Appendix C7. Geotechnical Assessment Report

Transcription

1 Appendix C7 Geotechnical Assessment Report

2 a Old Main Road, Judges Walk, Kloof, Kwazulu-Natal, South Africa, 6 PO Box 89, Gillitts, 6, South Africa Tel: +7 () 76 7 Fax: +7 () 76 7 Web: Geotechnical Investigation for the Maquasa East new Coal Discard Dump Report Version June Kangra GCS Project Number: -7 Client Reference: Kangra GCS (Pty) Ltd. Reg No: /76/7 Est. 987 Offices: Durban Johannesburg Lusaka Ostrava Pretoria Windhoek Directors: AC Johnstone (Managing) PF Labuschagne AWC Marais S Pilane F Pieterse

3 Kangra Kangra Maquasa East Discard Dump Report Version June Kangra -7 DOCUMENT ISSUE STATUS Report Issue Draft GCS Reference Number GCS Ref - -7 Client Reference Kangra Title Geotechnical Investigation for the Kangra Maquasa East Discard Dump Name Signature Date Author Document Reviewer Director Stephen Kelly Andrew Johnstone Andrew Johnstone LEGAL NOTICE This report or any proportion thereof and any associated documentation remain the property of GCS until the mandator effects payment of all fees and disbursements due to GCS in terms of the GCS Conditions of Contract and Project Acceptance Form. Notwithstanding the aforesaid, any reproduction, duplication, copying, adaptation, editing, change, disclosure, publication, distribution, incorporation, modification, lending, transfer, sending, delivering, serving or broadcasting must be authorised in writing by GCS. -7 June Page ii

4 Kangra Kangra Maquasa East Discard Dump EXECUTIVE SUMMARY GCS (Pty) Ltd. was contracted by Kangra to undertake a Geotechnical Investigation for the Maquasa East Coal Discard Dump. The report is outlined below and includes the geology of the site and gives recommendations pertaining to the proposed development. The site is characterised by residual sandstone and shale with a pedogenic horizon in different stages of cementation. The bulk of the material is clayey sand with occurrences of silt and gravel. -7 June Page iii

5 Kangra Kangra Maquasa East Discard Dump CONTENTS PAGE INTRODUCTION... SCOPE OF WORK... SITE DESCRIPTION... FIELD WORK... GEOLOGY SITE GEOLOGY: COLLUVIUM: RESIDUAL SANDSTONE: RESIDUAL SHALE SHALE BEDROCK PEDOGENIC FERROCRETE... 7 GROUNDWATER LABORATORY TESTING LABORATORY TESTING SUMMARY MATERIALS CLASSIFICATION:... 7 DEVELOPMENT GUIDELINES PROPOSED DEVELOPMENT: EXCAVATION REQUIREMENTS AND TRENCHABILITY: MATERIALS EVALUATION AND SUBGRADE TREATMENT: STABILITY OF THE SITE DRAINAGE PIPE BEDDING DWAF MINIMUM REQUIREMENTS FOR LANDFILL CONSTRUCTION... 8 CONCLUSIONS AND RECOMMENDATIONS... 9 LIST OF FIGURES Figure. IP Figure. IP 9 Figure. IP Figure. IP 6 LIST OF TABLES Table. Site geology summary Table. Groundwater Inspection Summary Table. Average Rainfall Table. Summary of Laboratory Test Results Table. Material Classification and Usage Table 6. Summary of requirements set out by DWA and suitability of natural materials -7 June Page

6 Kangra Kangra Maquasa East Discard Dump LIST OF APPENDICES APPENDIX A... APPENDIX B... FIGURES June Page

7 Kangra Kangra Maquasa East Discard Dump INTRODUCTION GCS Water and Environment (Pty) Ltd. were appointed by Kangra Coal to conduct a Geotechnical Investigation for a new Discard Dump. The field work took place between the dates of - th May. The objective of the report is to provide an indication of the availability of any suitable natural materials for clay liner construction in landfills and the general stability of the site. Other investigations undertaken in close vicinity to the site include: Moore Spence Jones report 9-78, titled, Report to Groundwater Consulting Services (GCS) and Union Fenosa on a Geotechnical Investigation for the Proposed Kangra Coal-Fired Power Station to be Located at Driefontein near Piet Retief, Mpumalanga Province GCS report 9-6, titled, Magnetic and Electromagnetic Geophysical Investigation for Kangra Power Station. The report contains results of the geotechnical investigation with recommendations pertaining to drainage, site stability and materials classification and usage. SCOPE OF WORK The following outlines the scope of the work for the geotechnical investigation: Excavation and assessment of 7 inspection pits according to the Geoterminology Workshop (), Guidelines for Soil and Rock Logging SAIEG-AEG-SAICE; Submission of disturbed and undisturbed soil samples under chain of custody for laboratory testing at Matrolab and Drennan Maud and Partners, in Unmgeni Park and Berea respectively. SITE DESCRIPTION The location of the site is approximately km west of Piet Retief and. km west of Driefontein which can be seen on the Locailty Map provided. The site is topographically flat with a slight slope in a westerly direction at.9%. The site is currently bare with only a small stockpile found midway up the eastern boundary processed at the time of the field investigation. Subsistence grazing of cattle by locals also was observed. The vegetation consists of short to medium length grasses with a concentration of large gum trees towards the central eastern portion. There are no services found on the site, however a conveyer belt bounds the southern portion and construction roads bound the eastern portion. A nonperennial river also runs in a SW-NE direction bounding the western portion of the site. A good visual indication of the site can be seen below in Figures through. -7 June Page

8 Kangra Kangra Maquasa East Discard Dump Figure. IP Figure. IP 9 Figure. IP Figure. IP 6-7 June Page

9 Kangra Kangra Maquasa East Discard Dump FIELD WORK Field work comprised the excavation and assessment of 7 inspection pits, designated IP through IP 7. The inspection pits were excavated using a 7 Ton excavator to depths of between. to greater than. meters. The pits were profiled by an engineering geologist with representative disturbed and undisturbed samples taken to commercial laboratories for testing. IP 6 was emitted from the investigation due to its position in the close vicinity of the working stockpile. The positions of the inspection pits can be seen on the Test Pit Map provided. The logs of the inspection pits can be seen in Appendix A. Geoterminology Workshop (), Guidelines for Soil and Rock Logging in South Africa SAIEG, AEG, SAICE -7 June Page

10 Kangra Kangra Maquasa East Discard Dump GEOLOGY The : Geological Series Map indicates that the site is underlain by Sandstone and Shale of the Vryheid Formation and disseminated Dolerite intrusions of the Karoo Super Group.. Site Geology: The site is predominately characterized by a colluvial horizon underlain by either residual sandstone or shale, which is underlain by either sandstone or shale bedrock. A fairly common pedogenic ferrocrete horizon in different stages of cementation was found, with the excavator refusing on an impenetrable very dense to hardpan ferrocrete horizon in some inspection pits.. Colluvium: The colluvium found on site is characterized by either a dry to slightly moist light grey medium dense intact silty fine sand, or in some of the southern lower lying areas a moist dark grey soft intact slightly silty clay. The horizon ranges in depth from surface to an average.m.. Residual Sandstone: The residual sandstone varied in its characteristics according to depth in the soil profile and presence of water, and could be roughly broken into three different horizons, from..m;..m and. to.m. Residual sandstone was found in IP - IP 8; IP IP ; IP7 IP and IP IP9. From approximately. to between..m a dry to slightly moist yellowish brown to light grey loose to medium dense intact, clayey fine to medium sand. From roughly. to between. -.m a slightly moist to wet reddish brown occasionally mottled yellowish brown medium dense to dense intact with intermittent relic rock structures such as bedding, gravelly clayey sand to clayey sand. Within the sand fraction, majority of the material is fine grained. From. to greater than.m a slightly moist to moist light yellow and light grey dense to very dense and stiff to very stiff intact clayey silty fine sand to sandy silt.. Residual Shale Residual shale was found at IP, IP, IP6, IP and IP to IP7. It is generally dry to moist with various colours ranging from dark grey to yellowish brown soft to very stiff intact with laminations and bedding planes fine sandy gravelly clay to clay. -7 June Page 6

11 Kangra Kangra Maquasa East Discard Dump. Shale Bedrock Shale bedrock was only encountered in IP, IP and IP. It consists of a dark grey highly weathered laminated very fine grained very soft to soft rock, from the Vryheid Formation..6 Pedogenic Ferrocrete Pedogenic ferrocrete was found in IP8, IP9, IP, IP6 to IP8, IP, IP, IP, IP and IP7. The horizon consists of a slightly moist to moist reddish brown to yellowish grey dense becoming very dense intact with varying degrees of cementation, sandy clayey silty fine to medium gravel. Ferrocrete nodules are sub-rounded to rounded fine to medium grained gravel and occasionally occur as an angular cobbled sized mass due to cementation, when breaking up the hardpan. Cementation of the hardpan ferrocrete in some instances was so hard that the excavator refused. A summary of the site geology is observed below in Table. Table. Site Geology Summary Depth (m) Lithology Material description.-. Colluvium.-. Res. Sandstone.-. Res. Sandstone.-. Res. Sandstone Light grey to dark grey; medium dense and soft; silty fine sand and silty clay Yellowish brown to light grey; loose to medium dense; clayey fine to medium sand Reddish brown mottled yellowish brown; medium dense to dense; gravelly clayey sand to clayey sand Light yellow and grey; dense to very dense and stiff to very stiff; clayey silty fine sand to sandy silt Depth (m) Lithology Material Description.-. Res. Shale Yellowish brown; soft to very stiff; sandy gravelly clay to sandy clay.7-. Shale bedrock Dark grey; highly weathered; very soft to soft rock Depth (m) Lithology Material Description.6-. Ferrocrete Reddish brown; dense to very dense occasionally hardpan; sandy clayey silty fine to medium gravel -7 June Page 7

12 Kangra Kangra Maquasa East Discard Dump GROUNDWATER Groundwater seepage was observed in of the inspection pits excavated on site (summarised in Table. below). A ferrocrete horizon was observed in some of the inspection pits investigated. These findings are confirmed by the Moore Spence Jones report 9-78 where permanent water levels were measured in two boreholes at. and 7.m below ground level. Table. Groundwater Inspection Summary IP No. Groundwater seepage depth (m)* Comments. Slow flow rate. Slow to moderate flow rate. Slow flow rate * Below natural ground level Table. Average Rainfall Month Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Avg. mm June Page 8

13 Kangra Kangra Maquasa East Discard Dump 6 LABORATORY TESTING 6. Laboratory Testing Summary In order to classify the materials underlying the site and to assess their suitability for use, laboratory testing was performed on selected samples obtained from selected layers in the exposure profiles. The following tests were conducted: Foundation Indicator tests (Particle size analysis including Hydrometer and Atterberg Limit Determination) Materials strength tests comprising Mod AASHTO moisture-density relationship and California Bearing Ration (CBR) tests. Shear strength analysis Permeability testing (Falling head test done at 9% Mod AASHTO) The results of the laboratory tests are given in Appendix B and summarised in Table below. -7 June Page 9

14 Kangra Kangra Maquasa East Discard Dump IP No. Depth (m) Description Reddish brown silty SAND, Res. Sandstone Reddish brown GRAVEL, Ferrocrete Reddish brown clayey gravelly SAND, Res. Sandstone Yellowish brown clayey SAND, Res. Sandstone Yellowish brown clayey SAND, Res. Sandstone Light pink silty SAND, Res. Sandstone Light greyish yellow sandy SILT, Res. Sandstone Light grey silty gravelly SAND, Colluvium Reddish brown clayey SAND, Res. Sandstone Reddish brown clayey gravelly SAND, Res. Sandstone Table. Summary of Laboratory Test results Atterberg Limits Particle Size % Modified AASHTO GM Clay Silt Sand Gravel LL PI LS% MDD (kg/m ) CBR Values (%) Compaction MDD (%) Swell (%) Classification and Activity OMC % A-(); SM; LOW A--(); GW-GC; G6; LOW A--6(); SC; G7; LOW A-(); SC; LOW A-6(); SC; Inferred G8/G9; LOW-MED A--(); SM; Inferred G; SP LOW A-7-(); OL; MED A--(); SM-SC; LOW A-6(6); OL; LOW A--(); SC; LOW -7 June Page

15 Kangra Kangra Maquasa East Discard Dump LL - Liquid Limit GM - Grading Modulus Classification in Terms of: PI - Plasticity Index MDD - Maximum Dry Density USPRA LS - Linear Shrinkage OMC - Optimum Moisture Content Unified Soil Classification System TRH (98) van de Merwe TRH -7 June Page

16 Kangra Kangra Maquasa East Discard Dump 6. Materials Classification: From the results of the laboratory tests provided in Table. above, materials encountered beneath the site have been assessed to provide an indication of their suitability for use in the construction of fills and road pavement layers, and summarized in Table below. Residual Sandstone Table. Materials Classification and Usage Material Type Classification Recommended use Clay =. to.8% Silt = 9. to.% Sand =.6 to 8.% Gravel =. to 6.7% PI = SP to GM =. to.9 Ferrocrete CBR =. 9% MDD CBR =.6 9% MDD CBR =.6 9% MDD CBD = 7. to 98% MDD CBR = 8.7 % MDD A--() to A-7-(); Anticipate <G to G7 Clay =.8% Silt =.% Sand = 7.7% Gravel = 76.% PI = 8 GM =.9 CBR = 9% MDD CBR = 9% MDD CBR 9% MDD CBD = 98% MDD CBR = % MDD Poor to good subgrade material. Generally suitable for use in subgrade layers in construction of bulk fills and selected layers in roads and paved areas, depending on the fines content. According to TRH for use in unpaved roads, material tends to be slippery and occasionally good depending on the sand content. Good subgrade material. Generally suitable for use in subgrade layers in the construction of bulk fills, selected and sub-base layers in road and paved areas. According to TRH for use in unpaved roads, material tends to ravel and corrugate. Colluvium A--(), Anticipate <G6 Clay = % Silt = 8.7% Sand = 6.% Gravel = % PI = GM =. Good subgrade material. Due to volume constraints, material should be stockpiled for final greening. A--(); Anticipate <G -7 June Page

17 Kangra Kangra Maquasa East Discard Dump 7 DEVELOPMENT GUIDELINES 7. Proposed development: The proposed development is a discard dump for coal tailings at the Kangra Maquasa East Site. The discard dump will include two HDPE lined Pollution Control Dams to the north, and a phase dump plan progressing in north to south direction. Toe-drains will be located along the length the western downslope side, with a storm water trench located towards the south of the site discharging into the surface water system. 7. Excavation Requirements and Trenchability: From the refusal depths of the excavator and the data from the Geophysical Survey, the site is deemed to be a Soft Excavation (SABS DM) from surface to approximately.m, thereafter Intermediate to Hard Excavation (SABS DM) is expected. The site proposed for the Pollution Control Dams will have a Soft Excavation (SABS DM) from surface to approximately.m, there after Intermediate to Hard Excavation can be expected due to the presence of scattered shale bedrock. Cognizance must be taken of the hardpan ferrocrete present, especially in the vicinity of IP8, 9,, and 7; IP6, 7, 8, and ; and IP 7. Due to the refusal of the excavator, it can be comfortably be assumed that either stronger plant equipment or blasting will be needed to break through this horizon. Allowance should be made for uncovering hardpan ferrocrete elsewhere on the site, due to its sporadic nature and variance in degree of cementation. 7. Materials Evaluation and Subgrade Treatment: The colluvium generally consists of a gravelly sand and should be stockpiled for later use in greening the top of the discard dump. It should be skimmed from surface to a depth of.m. The ferrocrete is typically very coarse grained, with a Grading Modulus of.9, PI of 8 and.% swell. According to TRH it classifies as a G6, USPRA a A--() and according to TRH, if used on unpaved roads tends to ravel and corrugate. The residual sandstone consists mainly of clayey sand with varying amounts of silt and gravel depending on the over- and underlying horizons. It has a Grading Modulus of. to.9 and PI of 7 to and typically exhibits low activity. The material is varied and is classified according to USPRA as A--() to A-7-(), according to TRH a G7 to <G and if used on unpaved roads tends to be slippery. The suitability of the various materials for use in clay liner construction is tabulated in Section 8.7 below. -7 June Page

18 Kangra Kangra Maquasa East Discard Dump 7. Stability of the site In the pursuit of a stable site all surface and subsurface water should be removed during construction. At the time of the investigation rainfall levels were dropping as winter approached, as seen in Table above. If possible, construction should be avoided during the rainy summer months. Slope stability is not of concern as the topography of the site is very gentle and does not cross any areas of potential concern. 7. Drainage A storm water management system should be designed to remove all surface water from the site and direct it to natural drainage lines. It is important that the storm water system accommodate the removal of any accumulated surface water. Removal of surface water from the site should in all circumstances conform to the local authorities requirements. 7.6 Pipe Bedding From both visual assessment of the materials encountered in the inspection pits and the laboratory test results in Table and their evaluation in Table, the following conclusions can be made regarding the suitability of the in situ materials for use in construction of bedding layers for buried flexible pipes according to SABS LB: According to SABS LB Selected Granular Material is classified as, granular, noncohesive and singularly graded between.6-9. mm. The material must be free draining and have a compactability factor of no more than.. It is uncommon to find natural material meeting these requirements. SABS LB Selected Fill is classified as, a material with a Plasticity Index (PI) not exceeding 6, free from lumps, vegetation and stones of a diameter exceeding mm. The residual sandstone generally has a PI of SP to, and a GM of. to.9. It has a clay content ranging between. to.8%, a silt content of 9. to.% and a sand content of.6 to 8.%. The material is highly variable and classifies as A--() to A-7-(). It does not meet the requirements set out for pipe bedding by SABS LB and therefore cannot be used as selected granular material or selected fill. All selected granular material and selected fill material is not naturally available and if required will need to be imported to site. -7 June Page

19 Kangra Kangra Maquasa East Discard Dump 7.7 DWAF Minimum Requirements for landfill construction Guidelines for the construction of a clay liner used in landfills are given in the document, Department of Water Affairs, Minimum Requirements for Landfills, Second Edition 998. A summary of the requirements for each layer in a landfill liner is given in Table 6 below, with the suitability of natural materials. -7 June Page

20 Kangra Kangra Maquasa East Discard Dump Table. Summary of requirements set out by DWA and suitability of natural materials Layer Requirements set out by the DWA for Landfill liners Proposed suitable of natural material Comments mm minimum layer thickness Sand, gravel and rubble or other suitable material to prevent desiccation Residual sandstone with higher silt content tends to have a GM of.8 to.9. Majority of the silty residual sandstone has a sand size fraction of fine to medium. O Layer Ferrocrete and residual sandstone Ferrocrete is gravelly and hardpan can be crushed/broken to cobble size. Blend ferrocrete and residual sandstone. Alternatively import suitable gravel and rubble. A Layer mm minimum layer thickness Single-sized gravel or crushed stone between 8-mm Hardpan ferrocrete Needs to be crushed to required size. Amount and position of hardpan ferrocrete throughout the site is not quantifiable. Alternatively import crushed stone B Layer mm minimum layer thickness Compacted to minimum 9% Standard Proctor MDD at OMC to OMC +% Residual sandstone Blend all residual sandstone material to get the PI to an average of or above. -7 June Page 6

21 Kangra Kangra Maquasa East Discard Dump Minimum PI of but not so high that excessive desiccation could occur Maximum particle size mm Difficult to remove ferrocrete nodules larger than mm due to sieving clayey materials. Significant amounts of fine sand. CBR of between 7 and at 9% MDD. Residual sandstone with high silt content predominantly has a lower PI (<) and if possible should be emitted. Alternatively import material with a suitable clay content. C Layer Geotextile D Layer mm minimum layer thickness Single-sized gravel or crushed stone between 8-mm Hardpan ferrocrete Needs to be crushed to the required size. Amount and position of hardpan ferrocrete throughout the site is not quantifiable. Alternatively import crushed stone. E Layer mm minimum layer thickness Fine to medium sand or similar suitable material Residual sandstone Residual sandstone with higher silt content tends to have a GM of.8 to.9 Majority of the more silty residual sandstone has a sand size fraction of fine to medium. -7 June Page 7

22 Kangra Kangra Maquasa East Discard Dump F Layer Geomembrane or Flexible Membrane Liner (FML) G Layer mm minimum layer thickness Compacted to minimum 9% Standard Proctor MDD at OMC to OMC +% Residual sandstone Rip and re-compact in situ residual sandstone -7 June Page 8

23 Kangra Kangra Maquasa East Discard Dump 8 CONCLUSIONS AND RECOMMENDATIONS The results of the Geotechnical Investigation for the Kangra Coal Discard Dump indicate that the site is deemed acceptable for the proposed use. The in situ characteristics of the site and associated subsoils have been assessed both visually and by laboratory testing. Recommendations pertaining to the natural materials found on site and their specific use in landfill liner construction are given, however the use of these materials is up to the discretion of the design engineer. Finally, ground conditions described in this report refer specifically to those encountered in the inspection pits excavated on site. It is therefore quite possible that conditions at variance with those discussed may be encountered elsewhere. -7 June Page 9

24 Kangra Kangra Maquasa East Discard Dump APPENDIX A -7 June Page

25 Client Project Name Job No. Date Excavated Date Typed Kangra Kangra Coal Discard Dump Hole No. IP Depth (m) Lithology Depth (m) Lithology Description.. Slightly moist to moist, dark brown, loose to medium dense, intact, silty clayey fine to medium SAND, Colluvium Moist, yellowish brown, firm, intact, sandy CLAY, Residual Sandstone.. Moist, reddish brown mottled yellow, soft to firm, intact, slightly gravelly CLAY, Residual Sandstone.... Moist, light orange becoming light yellow, dense becoming very dense, intact, clayey fine to medium SAND, Residual Sandstone.. END OF HOLE Notes:. Final Depth:.m on very dense clayey fine to medium SAND. NSWC. NGWS. No Samples Coordinates X coord: Y coord: 69.7 Hole No. IP

26 Client Project Name Job No. Date Excavated Date Typed Kangra Kangra Coal Discard Dump Hole No. IP Depth (m) Lithology Depth (m) Lithology Description Dry, light grey, medium dense, intact, silty fine SAND, Colluvium.. Dry, yellowish brown, firm, intact, silty sandy CLAY, Residual Sandstone.. Slightly moist to moist, reddish brown, firm, intact, slightly gravelly CLAY, Residual Sandstone.... Moist, reddish brown mottled yellow becoming light grey streaked pink, firm, intact thinly bedded, fine sandy CLAY, Residual Sandstone.. END OF HOLE Notes:. Final Depth:.m on firm fine sandy CLAY. NSWC. NGWS. No Samples Coordinates X coord: Y coord: Hole No. IP

27 Client Project Name Job No. Date Excavated Date Typed Kangra Kangra Coal Discard Dump Hole No. IP Depth (m) Lithology Depth (m) Lithology Description Dry, light greyish brown, medium dense, intact, silty fine to medium SAND, Colluvium.. Dry, yellowish brown, loose to medium dense, intact, slightly clayey fine to medium SAND, Residual Sandstone.... Slightly moist, reddish brown, firm to stiff, intact, sandy CLAY, Residual Sandstone.. Slightly moist becoming moist, light brownish yellow, dense, intact, clayey fine SAND becoming sandy CLAY with depth, Residual Sandstone.. END OF HOLE Notes:. Final Depth:.m on stiff sandy CLAY. NSWC. NGWS. No Samples Coordinates X coord: Y coord: 66.7 Hole No. IP

28 Client Project Name Job No. Date Excavated Date Typed Kangra Kangra Coal Discard Dump Hole No. IP Depth (m) Lithology Depth (m) Lithology Description.. Dry, light greyish brown, medium dense, intact, silty fine to medium SAND, Colluvium Dry, yellowish brown, loose to medium dense, intact, slightly clayey fine to medium SAND, Residual Sandstone.. Slightly moist, reddish brown, firm, intact, sandy CLAY, Residual Sandstone.... Slightly moist becoming moist with depth, light yellowish grey, medium dense to dense, intact, silty clayey SAND, Residual Sandstone.. END OF HOLE Notes:. Final Depth:.m on medium dense to dense silty SAND. NSWC. NGWS. No Samples Coordinates X coord: Y coord: 67.6 Hole No. IP

29 Client Project Name Job No. Date Excavated Date Typed Kangra Kangra Coal Discard Dump Hole No. IP Depth (m) Lithology Depth (m) Lithology Description.. Dry, brown, medium dense to dense, intact, silty fine to medium SAND, Colluvium Dry, yellowish brown, medium dense, intact, silty clayey fine SAND, Residual Sandstone.. Slightly moist, reddish brown mottled yellow, firm to stiff, intact, slightly gravelly slightly sandy CLAY, Residual Sandstone.... Slightly moist, light grey and yellow, dense, intact, clayey silty fine SAND, Residual Sandstone.. END OF HOLE Notes:. Final Depth:.m on dense silty clayey fine SAND. NSWC. NGWS. No Samples Coordinates X coord: Y coord: 6866 Hole No. IP

30 Client Project Name Job No. Date Excavated Date Typed Kangra Kangra Coal Discard Dump Hole No. IP 7 Depth (m) Lithology Depth (m) Lithology Description.. Dry, brown, medium dense to dense, intact, silty fine to medium SAND, Colluvium.. Dry, yellowish brown, medium dense, intact, clayey fine SAND, Residual Sandstone.... Slightly moist, reddish brown mottled yellow, firm, slightly sandy CLAY, Residual Sandstone.. Moist, light grey, dense, intact, clayey fine to medium SAND, Residual Sandstone END OF HOLE Notes:. Final Depth:.m on dense clayey fine to medium SAND. NSWC. NGWS. No Samples Coordinates X coord: Y coord: 689. Hole No. IP 7

31 Client Project Name Job No. Date Excavated Date Typed Kangra Kangra Coal Discard Dump Hole No. IP 8 Depth (m) Lithology Depth (m) Lithology Description Dry, light grey, medium dense, intact, silty SAND, Colluvium.. Dry, yellowish brown, loose, intact, clayey fine to medium SAND, Residual Sandstone.. Slightly moist, reddish brown, dense becoming very dense, intact, sandy clayey fine to medium GRAVEL, Ferrocrete Horizon.... END OF HOLE.. Notes:. Final Depth: Refusal at.m on a Ferrocrete Horizon. NSWC. NGWS. Samples: Coordinates X coord: Y coord: Hole No. IP 8

32 Client Project Name Job No. Date Excavated Date Typed Kangra Kangra Coal Discard Dump Hole No. IP 9 Depth (m) Lithology Depth (m) Lithology Description Dry, light grey, medium dense, intact, silty SAND, Colluvium.. Dry, reddish brown, very dense, intact, silty sandy GRAVEL, Ferrocrete Horizon.... END OF HOLE.... Notes:. Final Depth: Refusal at.m on a Ferrocrete Horizon. NSWC. NGWS. No Samples Coordinates X coord: Y coord: 67.6 Hole No. IP 9

33 Client Project Name Job No. Date Excavated Date Typed Kangra Kangra Coal Discard Dump Hole No. IP Depth (m) Lithology Depth (m) Lithology Description Dry, light grey, medium dense, intact, silty SAND, Colluvium.... Dry to slightly moist, yellowish brown, medium dense, intact, clayey fine SAND, Residual Shale.. Slightly moist, dark grey, firm, intact, CLAY, Residual Shale.. Dark grey, highly weathered, laminated, very fine grained, VERY SOFT TO SOFT ROCK, Shale, Vryheid Formation.. END OF HOLE Notes:. Final Depth: Refusal at.m on a Shale Bedrock. NSWC. NGWS. Samples: Coordinates X coord: 99.9 Y coord: 6.8 Hole No. IP

34 Client Project Name Job No. Date Excavated Date Typed Kangra Kangra Coal Discard Dump Hole No. IP Depth (m) Lithology Depth (m) Lithology Description Dry, light grey, medium dense, intact, silty SAND, Colluvium.. Dry to slight moist, yellowish brown, firm intact sandy CLAY, Residual Sandstone.... Slightly moist to moist, light pink mottled yellowish brown, dense, intact, clayey fine SAND, Residual Sandstone.... Slightly moist to moist, light yellow, dense becoming very dense with depth, intact, slightly clayey fine SAND, Residual Sandstone END OF HOLE Notes:. Final Depth:.m on very dense clayey fine SAND. NSWC. NGWS. Samples: Coordinates X coord: 99.7 Y coord: 6.89 Hole No. IP

35 Client Project Name Job No. Date Excavated Date Typed Kangra Kangra Coal Discard Dump Hole No. IP Depth (m) Lithology Depth (m) Lithology Description Dry, light grey, medium dense, intact, silty SAND, Colluvium.. Dry to slightly moist, yellowish brown, loose to medium dense, intact, silty clayey fine to medium SAND, Residual Sandstone.... Slightly moist to moist, yellowish brown mottled reddish brown, medium dense, intact with relic rock structure, fine to medium sandy CLAY, Residual Sandstone.... Slightly moist to moist, light yellow, dense becoming very dense, intact, slightly clayey fine to medium SAND, Residual Sandstone END OF HOLE Notes:. Final Depth:.m on very dense slightly clayey fine to medium SAND. NSWC. NGWS from. No Samples Coordinates X coord: Y coord: Hole No. IP

36 Client Project Name Job No. Date Excavated Date Typed Kangra Kangra Coal Discard Dump Hole No. IP Depth (m) Lithology Depth (m) Lithology Description Slightly moist to moist, dark grey, firm, intact, sandy CLAY, Colluvium.. Moist, reddish brown to yellowish grey, dense, intact, clayey GRAVEL, Ferrocrete Horizon.. Slightly moist to moist, reddish brown, firm to stiff, intact CLAY, Residual Sandstone.... Moist, light pink, dense becoming very dense, intact, slightly clayey fine to medium SAND, Residual Sandstone.. END OF HOLE Notes:. Final Depth:.m on very dense slightly clayey fine to medium SAND. NSWC. GWS from.-.m slow flow rate. No Samples Coordinates X coord: Y coord: 6.6 Hole No. IP

37 Client Project Name Job No. Date Excavated Date Typed Kangra Kangra Coal Discard Dump Hole No. IP Depth (m) Lithology Depth (m) Lithology Description.. Dry to slighly moist, grey becoming yellowish brown, medium dense, intact, silty fine to medium SAND, Colluvium.. Slightly moist to moist, reddish brown, soft to firm, intact, CLAY, Residual Sandstone.... Moist, light pink, dense becoming very dense past.m, intact, slightly clayey fine to medium SAND, Residual Sandstone.. END OF HOLE Notes:. Final Depth:.m on very dense slightly clayey fine to medium SAND. NSWC. NGWS. Samples Coordinates X coord: Y coord: Hole No. IP

38 Client Project Name Job No. Date Excavated Date Typed Kangra Kangra Coal Discard Dump Hole No. IP Depth (m) Lithology Depth (m) Lithology Description Dry, dark grey, soft, intact, slightly silty CLAY, Colluvium.. Dry, yellowish brown, loose, intact, clayey sandy GRAVEL, Residual Shale.. Slightly moist to moist, reddish brown, soft to firm, intact, slightly sandy CLAY, Residual Shale.. Slightly moist to moist, dark grey streaked red, firm, intact with laminations, CLAY, Residual Shale.... Moist, reddish brown, soft to firm, intact, CLAY, Residual Shale END OF HOLE Notes:. Final Depth:.m on firm CLAY. NSWC. NGWS. No Samples Coordinates X coord: Y coord: Hole No. IP

39 Client Project Name Job No. Date Excavated Date Typed Kangra Kangra Coal Discard Dump Hole No. IP 6 Depth (m) Lithology Depth (m) Lithology Description Moist, dark grey, loose, intact, clayey fine to medium SAND, Colluvium.. Slightly moist to moist, light grey speckled red, dense, intact, clayey sandy GRAVEL, Residual Shale Slightly moist to moist, reddish brown, very dense, intact, clayey GRAVEL, Ferrocrete Horizon.... END OF HOLE.... Notes:. Final Depth: Refusal at.97m on Ferrocrete Horizon. NSWC. NGWS. No Samples Coordinates X coord: Y coord: 6.78 Hole No. IP 6

40 Client Project Name Job No. Date Excavated Date Typed Kangra Kangra Coal Discard Dump Hole No. IP 7 Depth (m) Lithology Depth (m) Lithology Description Slightly moist, dark brown, medium dense, intact, silty clayey fine to medium SAND, Colluvium.. Slightly moist, to moist, yellowish brown, soft, intact, sandy CLAY, Residual Sandstone.. Slightly moist to moist, reddish brown mottled yellow, firm, intact, slightly gravelly CLAY, Residual Sandstone Slightly moist to moist, reddish brown, dense becoming very dense, cemented, clayey GRAVEL, Ferrocrete Horizon.. END OF HOLE.... Notes:. Final Depth: Refusal at.7m on Ferrocrete Horizon. NSWC. NGWS. No Samples Coordinates X coord: Y coord: 6.8 Hole No. IP 7

41 Client Project Name Job No. Date Excavated Date Typed Kangra Kangra Coal Discard Dump Hole No. IP 8 Depth (m) Lithology Depth (m) Lithology Description Slightly moist, greyish brown, medium dense, intact, silty clayey fine to medium SAND, Colluvium.. Moist, yellowish brown, soft, intact, sandy CLAY, Residual Sandstone Moist, reddish brown mottled yellow, soft becoming firm to stiff with depth, intact, slightly gravelly CLAY, Residual Sandstone Moist, reddish brown, very dense, cemented, clayey GRAVEL, Ferrocrete Horizon.... END OF HOLE.... Notes:. Final Depth: Refusal at.m on Ferrocrete Horizon. NSWC. NGWS. No Samples Coordinates X coord: Y coord: Hole No. IP 8

42 Client Project Name Job No. Date Excavated Date Typed Kangra Kangra Coal Discard Dump Hole No. IP 9 Depth (m) Lithology Depth (m) Lithology Description Dry, light greyish brown, medium dense, intact, silty fine to medium SAND, Colluvium.. Dry, yellowish brown, loose to medium dense, intact, slightly clayey fine to medium SAND, Residual Sandstone.. Slightly moist, dark reddish brown becoming mottled yellow with depth, stiff, intact, slightly sandy CLAY, Residual Sandstone.... Slightly moist becoming moist with depth, light pink mottled light grey, stiff to very stiff, intact with relic rock structure, fine sandy CLAY, Residual Sandstone.. END OF HOLE Notes:. Final Depth:.m on very stiff very fine sandy CLAY. NSWC. NGWS. No Samples Coordinates X coord: Y coord: Hole No. IP 9

43 Client Project Name Job No. Date Excavated Date Typed Kangra Kangra Coal Discard Dump Hole No. IP Depth (m) Lithology Depth (m) Lithology Description Dry, light grey, loose to medium dense, intact, silty fine SAND, Colluvium.. Dry, yellowish brown, medium dense, intact, clayey fine SAND, Residual Sandstone.... Slightly moist becoming moist with depth, reddish brown mottled yellow, soft to firm, intact with relic bedding, sandy CLAY becoming clayey fine SAND with depth, Residual Sandstone.... END OF HOLE Notes:. Final Depth:.m on medium dense clayey fine SAND. NSWC. NGWS. Samples: Coordinates X coord: Y coord: Hole No. IP

44 Client Project Name Job No. Date Excavated Date Typed Kangra Kangra Coal Discard Dump Hole No. IP Depth (m) Lithology Depth (m) Lithology Description Moist, dark grey, loose, intact, clayey fine to medium SAND, Colluvium.. Moist, light brown, soft, intact, sandy CLAY, Residual Shale.. Moist, reddish brown mottled yellow, dense, becoming very dense, cemented, clayey GRAVEL, Ferrocrete Horizon.... END OF HOLE.. Notes:. Final Depth: Refusal at.86m on Ferrocrete Horizon. NSWC. NGWS. No Samples Coordinates X coord: Y coord: 6.88 Hole No. IP

45 Client Project Name Job No. Date Excavated Date Typed Kangra Kangra Coal Discard Dump Hole No. IP Depth (m) Lithology Depth (m) Lithology Description Moist, dark grey, soft, intact, slightly silty CLAY, Colluvium.. Moist, light grey, soft, intact, CLAY, Residual Sandstone.. Moist to wet, reddish brown mottled light grey, stiff to very stiff, intact, gravelly CLAY with cobbles, Ferrocrete Horizon.... END OF HOLE.. Notes:. Final Depth: Refusal at.98m on Ferrocrete Horizon. NSWC. GWS from.m. Samples Coordinates X coord: Y coord: Hole No. IP

46 Client Project Name Job No. Date Excavated Date Typed Kangra Kangra Coal Discard Dump Hole No. IP Depth (m) Lithology Depth (m) Lithology Description.. Dry, brown, medium dense to dense, intact, silty fine to medium SAND, Colluvium Dry, yellowish brown, medium dense, intact, silty clayey fine SAND, Residual Sandstone.... Slightly moist, reddish brown mottled yellow, firm becoming stiff with depth, intact, sandy CLAY, Residual Sandstone.... Slightly moist to moist with depth, orangeish brown mottled light grey, dense to very dense, intact, clayey GRAVEL, Residual Sandstone END OF HOLE Notes:. Final Depth:.m on very dense clayey GRAVEL. NSWC. GWS from.m slow to moderate flow rate. No Samples Coordinates X coord: Y coord: 696. Hole No. IP

47 Client Project Name Job No. Date Excavated Date Typed Kangra Kangra Coal Discard Dump Hole No. IP Depth (m) Lithology Depth (m) Lithology Description Dry, light grey, loose to medium dense, intact, silty SAND, Colluvium.... Slightly moist light yellowish brown, medium dense, intact slightly clayey fine to medium SAND, Residual Sandstone.... Slightly moist, reddish brown, firm, intact, sandy CLAY, Residual Sandstone.. End of hole Notes:. Final Depth:.m on firm sandy CLAY. NSWC. NGWS. No Samples Coordinates X coord: Y coord: Hole No. IP

48 Client Project Name Job No. Date Excavated Date Typed Kangra Kangra Coal Discard Dump Hole No. IP Depth (m) Lithology Depth (m) Lithology Description Dry, light grey, loose to medium dense, intact, silty fine SAND, Colluvium.... Slightly moist, reddish brown mottled yellow, soft to firm, intact with relic rock structure, slightly sandy CLAY, Residual Sandstone.... Slightly moist to moist, light grey yellowish brown, firm, intact with relic rock structure, silty CLAY, Residual Sandstone.. END OF HOLE Notes:. Final Depth:.m on firm silty CLAY. NSWC. NGWS. No Samples Coordinates X coord: Y coord: 6.7 Hole No. IP

49 Client Project Name Job No. Date Excavated Date Typed Kangra Kangra Coal Discard Dump Hole No. IP 6 Depth (m) Lithology Depth (m) Lithology Description Dry, light grey, loose to medium dense, intact, silty fine SAND, Colluvium.. Dry, yellowish brown, medium dense, intact, sandy CLAY, Residual Sandstone.... Slightly moist, dark brown, stiff, intact with relic rock structure, sandy CLAY, Residual Sandstone.... Slightly moist to moist, reddish brown, firm to stiff, intact, slightly sandy slightly gravelly CLAY, Residual Sandstone END OF HOLE Notes:. Final Depth:.m on stiff slightly slightly gravelly sandy CLAY. NSWC. NGWS. Samples: Coordinates X coord: Y coord: 6.78 Hole No. IP 6

50 Client Project Name Job No. Date Excavated Date Typed Kangra Kangra Coal Discard Dump Hole No. IP 7 Depth (m) Lithology Depth (m) Lithology Description Dry, light grey, medium dense, intact, silty fine SAND, Colluvium.. Dry, yellowish brown becoming mottled red with depth, firm to stiff, intact with relic rock structure, sandy CLAY, Residual Sandstone.... Slightly moist, reddish brown mottled yellow, dense becoming very dense, intact, clayey gravelly fine to medium SAND, Residual Sandstone.... END OF HOLE Notes:. Final Depth:.7m onvery dense clayey gravelly fine to medium SAND. NSWC. NGWS. Samples: Coordinates X coord: Y coord: 6.8 Hole No. IP 7

51 Client Project Name Job No. Date Excavated Date Typed Kangra Kangra Coal Discard Dump Hole No. IP 8 Depth (m) Lithology Depth (m) Lithology Description Dry, light grey, medium dense, intact, silty SAND, Colluvium.. Dry, light grey, dense, intact, silty sandy GRAVEL, Residual Sandstone.. Slightly moist to moist, reddish brown, soft becoming firm, intact, CLAY, Residual Sandstone.... Slightly moist to moist, greyish brown, firm becoming stiff with depth, intact with relic rock structure, CLAY, Residual Sandstone.. END OF HOLE Notes:. Final Depth:.m on stiff CLAY. NSWC. NGWS. Samples: Coordinates X coord: Y coord: 6.66 Hole No. IP 8

52 Client Project Name Job No. Date Excavated Date Typed Kangra Kangra Coal Discard Dump Hole No. IP 9 Depth (m) Lithology Depth (m) Lithology Description Dry, light grey, medium dense, intact, silty SAND, Colluvium.... Dry, yellowish brown, medium dense to dense, intact, clayey fine to medium SAND, Residual Sandstone.... Slightly moist to moist, light pinkish white, medium dense becoming very dense with depth, intact, clayey fine to medium SAND, Residual Sandstone.. END OF HOLE Notes:. Final Depth:.m on very dense clayey fine to medium SAND. NSWC. NGWS. No Samples Coordinates X coord: Y coord: Hole No. IP 9

53 Client Project Name Job No. Date Excavated Date Typed Kangra Kangra Coal Discard Dump Hole No. IP Depth (m) Lithology Depth (m) Lithology Description Slightly moist, brown, loose, intact, silty fine to medium SAND, Colluvium.. Slightly moist, yellowish brown, loose, intact, clayey SAND, Residual Shale.. Slightly moist, reddish brown, very dense, partially cemented, gravelly CLAY becoming clayey GRAVEL, Ferrocrete Horizon.... Slightly moist, light yellowish brown, stiff to very stiff, intact, CLAY, Residual Shale.. END OF HOLE Notes:. Final Depth:.m on very stiff CLAY. NSWC. NGWS. No Samples Coordinates X coord: Y coord: 6.68 Hole No. IP

54 Client Project Name Job No. Date Excavated Date Typed Kangra Kangra Coal Discard Dump Hole No. IP Depth (m) Lithology Depth (m) Lithology Description Dry, light grey, loose to medium dense, intact, silty gravelly fine SAND, Colluvium.. Slightly moist, yellowish brown, medium dense, intact, clayey sandy GRAVEL, Residual Shale.. Slightly moist to moist, reddish brown mottled yellow, stiff, intact, gravelly CLAY, Residual Shale.... Slightly moist to moist, yellowish brown bedded with various colours, stiff to very stiff, intact and laminated, CLAY, Residual Shale.. END OF HOLE Notes:. Final Depth:.m on very stiff CLAY. NSWC. NGWS. No Samples Coordinates X coord: Y coord: Hole No. IP

55 Client Project Name Job No. Date Excavated Date Typed Kangra Kangra Coal Discard Dump Hole No. IP Depth (m) Lithology Depth (m) Lithology Description Dry, light grey, medium dense, intact, silty fine SAND, Colluvium.. Slightly moist, yellowish brown, medium dense, intact, clayey SAND, Residual Shale.. Slightly moist to moist, reddish brown mottled light grey, very dense, cemented, clayey GRAVEL, Ferrocrete Horizon.... Moist, yellowish brown becoming light grey, stiff becoming very stiff, intact, fine sandy CLAY, Residual Shale.. END OF HOLE Notes:. Final Depth:.m on very stiff fine sandy CLAY. NSWC. NGWS. No Samples Coordinates X coord: Y coord: Hole No. IP

56 Client Project Name Job No. Date Excavated Date Typed Kangra Kangra Coal Discard Dump Hole No. IP Depth (m) Lithology Depth (m) Lithology Description Dry, light grey, medium dense, intact, silty fine SAND, Colluvium.. Slightly moist, yellowish brown, medium dense, intact, clayey gravelly fine SAND, Residual Shale.... Slightly moist to moist, reddish brown, firm to stiff, intact, sandy CLAY, Residual Shale.. Slightly moist to moist, light yellowish brown, stiff, intact, CLAY, Residual Shale.. Dry to slightly moist, dark grey, very stiff, intact and laminated, organic CLAY, Residual Shale Dark grey, highly weathered, laminated, very fine grained, VERY SOFT ROCK, Shale, Vryheid Formation END OF HOLE Notes:. Final Depth:.m on very soft rock SHALE. NSWC. NGWS. Samples: Coordinates X coord: Y coord: Hole No. IP

57 Client Project Name Job No. Date Excavated Date Typed Kangra Kangra Coal Discard Dump Hole No. IP Depth (m) Lithology Depth (m) Lithology Description.. Dry, light grey, loose to medium dense, intact, silty gravelly fine SAND, Colluvium Slightly moist, yellowish brown, medium dense, intact, clayey sandy GRAVEL, Residual Shale.. Slightly moist, reddish brown, very dense, cemented, GRAVEL, Ferrocrete Horizon.. Slightly moist, light orangey brown, stiff, intact and laminated, slightly sandy CLAY becoming CLAY with depth, Residual Shale.... Slightly moist, dark grey, stiff to very stiff with depth, intact and laminated, CLAY, Residual Shale Dark grey, highly weathered, laminated, very fine grained, VERY SOFT ROCK, Shale, Vryheid Fromation Notes:. Final Depth:.m on very soft rock SHALE. NSWC. NGWS. Samples: Coordinates X coord: Y coord: 689. Hole No. IP

58 Client Project Name Job No. Date Excavated Date Typed Kangra Kangra Coal Discard Dump Hole No. IP Depth (m) Lithology Depth (m) Lithology Description Dry, light grey, loose, intact, silty fine to medium SAND, Colluvium.. Slightly moist, yellowish brown, loose, intact, clayey gravelly SAND, Residual Shale.. Slightly moist to moist, reddish brown, firm to stiff, intact with minor cementation, slightly gravelly CLAY, Residual Shale.... Slightly moist to moist, light orangeish brown mottled yellow, stiff, intact and laminated, slightly sandy CLAY, Residual Shale.. END OF HOLE Notes:. Final Depth:.m on stiff slightly sandy CLAY. NSWC. NGWS. No Samples Coordinates X coord: Y coord: 69. Hole No. IP

59 Client Project Name Job No. Date Excavated Date Typed Kangra Kangra Coal Discard Dump Hole No. IP 6 Depth (m) Lithology Depth (m) Lithology Description.. Dry, light grey, loose to medium dense, intact, silty gravelly fine SAND, Colluvium Slightly moist, yellowish brown, medium dense, intact, clayey sandy GRAVEL, Residual Shale.... Slightly moist to moist, reddish brown, firm to stiff, slightly gravelly slightly sandy CLAY, Residual Shale.. Slightly moist to moist, light yellowish brown, stiff to very stiff, intact, fine sandy CLAY, Residual Shale.. END OF HOLE Notes:. Final Depth:.m on very stiff fine sandy CLAY. NSWC. NGWS. Samples: Coordinates X coord: Y coord: Hole No. IP 6

60 Client Project Name Job No. Date Excavated Date Typed Kangra Kangra Coal Discard Dump Hole No. IP 7 Depth (m) Lithology Depth (m) Lithology Description.. Dry, light grey, loose to medium dense, intact, silty gravelly fine SAND, Colluvium Slightly moist, yellowish brown, medium dense, intact, clayey sandy GRAVEL, Residual Shale Slightly moist, reddish brown, very dense, cemented, GRAVEL, Ferrocrete Horizon.... END OF HOLE.... Notes:. Final Depth: Refusal at.m on Ferrocrete. NSWC. NGWS. Samples: Coordinates X coord: Y coord: 687. Hole No. IP 7

61 Kangra Kangra Maquasa East Discard Dump APPENDIX B -7 June Page

62 Date : Ref : Client : Project : -6-7 GCS (Pty) Ltd Kangra Discard Dump Falling Head Permeability Laboratory Number Sample Proctor OMC Dry Density Number MOD kg/m % Kg/m Permeability k = cm/sec x -7

63

64

65

66

67

68

69

70

71

72

73

74

75

76

77

78 CONSOLIDATED DRAINED SHEAR BOX TEST TEST RESULTS Project Kangra Discard Dump - Ref. -7 Ref no. 7 Description: Lab no Depth (m): Sample Type: Position: IP 6 Undisturbed Test Test Test Inputs Inputs Inputs Normal Stress (kpa) MC at Test (%). Normal Stress (kpa) MC at Test (%).67 Normal Stress (kpa) MC at Test (%). Prooving Ring Factor 8. Dry Density (kg/m ) Prooving Ring Factor 8.7 Dry Density (kg/m ) 9 Prooving Ring Factor 8.6 Dry Density (kg/m ) 7 Area (cm ) 6 Volume at Test (cm ) 78.7 Area (cm ) 6 Volume at Test (cm ) Area (cm ) 6 Volume at Test (cm ) 7.8 Volume (cm ) 79. Volume (cm ) 79. Volume (cm ) 79. Strain Prooving Vertical Total Total V/Vo Shear Strain Prooving Vertical Total Total V/Vo Shear Strain Prooving Vertical Total Total V/Vo Shear Guage Ring Gauge Strain Strain % Stress Guage Ring Gauge Strain Strain % Stress Guage Ring Gauge Strain Strain % Stress (mm) kn/m (mm) kn/m (mm) kn/m

79 CONSOLIDATED DRAINED SHEAR BOX TEST Project Kangra Discard Dump - Ref. -7 Ref no. 7 Lab no. 89 Sample Type Depth (m): Undisturbed Position: IP 6 Description: - Test Test Test Normal Stress (kn/m ) Dry Density (kg/m ) 9 7 Moisture Content (%)..7. Shear Strain (%)...6 Shear Strength Perameters Shear Stress (kn/m ) Angle of Internal Friction (o o ) 6 Cohesion (kpa) 7 Shear Stress vs Axial Strain 8 Test Test Test 6 Shear Stress (kn/m ) Shear Strain (%) Normal vs Shear Stress Shear Stress (kpa) Normal Stress (kpa)

80 CONSOLIDATED DRAINED SHEAR BOX TEST TEST RESULTS Project Kangra Discard Dump - Ref. -7 Ref no. 7 Description: Lab no. 9 - Depth (m):. -. Sample Type: Position: IP Undisturbed Test Test Test Inputs Inputs Inputs Normal Stress (kpa) MC at Test (%). Normal Stress (kpa) MC at Test (%). Normal Stress (kpa) MC at Test (%).9 Prooving Ring Factor Dry Density (kg/m ) 69 Prooving Ring Factor 8. Dry Density (kg/m ) 67 Prooving Ring Factor 86. Dry Density (kg/m ) 6 Area (cm ) 6 Volume at Test (cm ) 78. Area (cm ) 6 Volume at Test (cm ) 7.79 Area (cm ) 6 Volume at Test (cm ) 7. Volume (cm ) 79. Volume (cm ) 79. Volume (cm ) 79. Strain Prooving Vertical Total Total V/Vo Shear Strain Prooving Vertical Total Total V/Vo Shear Strain Prooving Vertical Total Total V/Vo Shear Guage Ring Gauge Strain Strain % Stress Guage Ring Gauge Strain Strain % Stress Guage Ring Gauge Strain Strain % Stress (mm) kn/m (mm) kn/m (mm) kn/m

81 CONSOLIDATED DRAINED SHEAR BOX TEST Project Kangra Discard Dump - Ref. -7 Ref no. 7 Lab no. 9 Sample Type Depth (m):. -. Undisturbed Position: IP Description: - Test Test Test Normal Stress (kn/m ) Dry Density (kg/m ) Moisture Content (%)...9 Shear Strain (%) Shear Strength Perameters Shear Stress (kn/m ) Angle of Internal Friction (o o ) Cohesion (kpa) 7 Shear Stress vs Axial Strain Test Test Test Shear Stress (kn/m ) Shear Strain (%) Normal vs Shear Stress Shear Stress (kpa) Normal Stress (kpa)

82 Kangra Kangra Maquasa East Discard Dump FIGURES -7 June Page

83

84