R M T Rock Mechanics Technology

Transcription

1 THE ROTARY SINGLE HEIGHT TELL TALE R M T Rock Mechanics Technology

2 STEP 1 Drill a vertical 25mm diameter hole in the roof to 4m minimum above the roofline. Min: 4m 25mm Ø M T ck Mechanics

3 STEP 2 Remove the telltale from its packaging. nwind the anchor wire, taking care not to tangle the wire M T ck Mechanics

4 STEP 3 Connect together the telltale installation rods ensuring the special adapter is at the top M T ock Mechanics Anchor spring adaptor to the top

5 STEP 4 Clip the telltale wire end anchor spring into he adapter at the top of the installation rods M T ock Mechanics

6 STEP 5 Place the installation rods and anchor spring into the mouth of the roof hole, ensuring concentricity M T ock Mechanics

7 STEP 6 Make sure the anchor wire is hanging freely, then push the rods to the back of the roof hole. Remove installation rods M T ock Mechanics

8 STEP 7 M T ock Mechanics Slide the telltale reference tube / dial plate assembly up the anchor wire and install the reference tube into the hole.

9 STEP 8 M T ock Mechanics Turn the dial pointer fully anticlockwise until it reaches the bottom of its travel

10 STEP 9 M T ock Mechanics Using a pair of pliers, slide the free ferrule from the end of the hanging wire until it contacts the end of the telltale pointer. arefully position the ferrule on the wire such that the telltale indicator is lifted approximately mm of indication off the bottom of its travel, then crimp the ferrule lightly

11 STEP 10 M T ock Mechanics Once satisfied with the position of the ferrule crimp the ferrule 3 times to secure

12 STEP 11 M T ock Mechanics Remove surplus wire

13 STEP 12 M T ock Mechanics urn the dial backing plate until the zero aligns with the pointer

14 SYSTEMATIC TELL TALE MONITORING FOR NORMAL ZERO SEAM CONDITIONS Tell Tales installed as section advances L5 L4 L3 L2 L1 BR AR R2 R3 R4 R TRACTOR ROAD BELT ROAD = ROTARY TELL TALE

15 TELL TALE LOCATIONS FOR A SECTION WORKING THROUGH AN AREA OF CONCERN L5 L4 L3 L2 L1 M R1 R2 R3 R4 R = ROTARY TELL TALE = AREA OF CONCERN TRACTOR ROAD BELT ROAD

16 TELL TALES INSTALLED AT INTERSECTIONS SHOULD BE AT THE CENTRE OF THE SPAN AND SHOULD BE INSTALLED BEFORE THE JUNCTION GEOMETRY IS FORMED STEP 1: STEP 2: STEP 3: X X X X X X Road excavated just past junction. Tell tale installed at the junction centre following support. Three way geometry formed Four way geometry formed RMT Rock Mechanics Technology This sequence illustrates the ideal timing of tell tale installation in relation to geometry formation to maximise the effectiveness of the tell tale.

17 Tell Tale Tell Tale SLIP WEAK SIDE WEAK SIDE SLIP CROSS SECTION CROSS SECTION SLIP Tell Tale 0.6m 0.6m Tell Tale SLIP RMT Rock Mechanics Technology PLAN PLAN

18 BOLTS SHOWN ARE IN ADDITION TO NORMAL SUPPORT AND MUST BE AT LEAST 0.5m LONGER THAN HEIGHT OF BROW NORMAL PATTERN RESUMED INCREASED BOLT DENSITY FOR 3 ROWS FROM BROW TELL TALE APPRROX 0.5m FROM ROADWAY CENTRE ADDITIONAL BOLTS WITHIN 0.3m OF 1.0m SPACINGS (max) LOW SIDE BROW HIGH SIDE NORMAL PATTERN RESUMED

19 NORMAL PATTERN BROW NORMAL PATTERN RESUMED TELL TALE 0.3m max 3 ROWS AT HIGHER BOLT DENSITY SECTION

20 REFERENCE CODES FOR TELL TALES INSTALLED IN A SECTION SECTION / ROAD / LEVEL X/ 1R-2R / L5 2R 1R X / 1R / L5 L5 X / 1R / L4-L5 L4 RMT Rock Mechanics Technology

21 READING TELL TALES It should be the the responsibility of the MINER each shift to record the tell tales by colour for all active areas in the section. A book should be kept at the section WAITING PLACE in which each shifts tell tale readings are recorded. Where a colour change takes place this should be reported on the Shift Boss s statutory shift report, together with comment on any remedial actions taken. In addition the Shift Boss should record the millimetre reading of the relevant tell tales. RMT Rock Mechanics Technology EACH SHIFT READ BY COLOUR :- GREEN YELLOW, OR RED IF A COLOUR CHANGE TAKES PLACE READ BY NUMBER

22 READING TELL TALES Once per week, the MINER should, in addition to recording his shiftly observations by colour, record the millimetre reading on each tell tale in his section (active areas). This information should be recorded on a weekly sheet, which should be passed to the nominated ROOF CONTROL AUDITOR for trend analysis. EACH WEEK READ BY MILLIMETRES : 0 mm RMT Rock Mechanics Technology

23 ACTION LEVELS GREEN 0-5 mm YELLOW 5-10 mm RED 10 mm + RMT Rock Mechanics Technology

24 ACTIONS REEN ELLOW ED No action required, continue routine monitoring Install additional reinforcement. Length and type of support to be determined by investigations co-ordinated by Shift Boss / Mine Overseer / Roof Control Officer. Restrict access. Consult Shift Boss / Mine Overseer Roof Control Officer. RMT Rock Mechanics Technology

25 GOLDEN RULE IF YOU SEE ANY TELL TALE IN YELLOW SECTOR INFORM YOUR SUPERVISOR RMT Rock Mechanics Technology

26 GOLDEN RULE IF YOU SEE ANY TELL TALE IN RED SECTOR WITHDRAW FROM AREA AND INFORM YOUR SUPERVISOR RMT Rock Mechanics Technology