# HACETTEPE UNIVERSITY MINING ENGINEERIN DEPARTMENT

Size: px
Start display at page:

## Transcription

1 HACETTEPE UNIVERSITY MINING ENGINEERIN DEPARTMENT Name: Cem LAFCI ID: LECTURE:TUNNELING and SUPPORT DESIGN LECTURER:Prof. Dr. Bahtiyar UNVER

2 INTRODUCTION BOLTING THEORIES TYPE OF ROCK BOLTS, VARIATIONS and COMPRESSION ZONES REINFORCEMENT MECHANISM OF ROCK BOLTS

3 Previously timber props or cribs used In 1927, rock bolt was used in metal mine In 1943 Weigel proposed the basic concepts

4 According the Weigel theory; some of his idea are still acceptable. These are: Support weakened rock below the natural arch line Bolt weak, thin strata to create thicker, stronger strata Bolt early in the mining

5 Advantages of rock bolting: Reduce storage Decrease size of the openening Prevents any appreciable deformations by quick installation Improving ventilation by lowering resistance Provides freedom for trackless vehicles Providing natural supports

6 Increasing trend of rock bolting

7 The theories used to explain bolting mechanism vary from place to place and sometimes are elusive. But there is 3 basic mechanism: Suspension Beam building Keying

8 SUSPENSION EFFECT of ROCK BOLTING

9 BEAM BUILDİNG EFFECT of ROCK BOLTING

10 KEYING EFFECTof ROCK BOLTING

11 Bolts are installed inclined to the roofline and perpendicular to the fracture plane: Where; σb= min. Axial stress bolt must be provide σp= Horizontal stress α= Angle between the normal to the fracture plane and the horizontal plane; ɸ = Friction angle of the fracture plane.

12 When the bolt is installed perpendicular to the roofline: Where; σb= min. Axial stress bolt must be provide σp= Horizontal stress α= Angle between the normal to the fracture plane and the horizontal plane; ɸ = Friction angle of the fracture plane.

13 Conventional Bolt Type Special Bolts

14 Based on the basic anchor types, bolts can be categorized into: Point-anchored Full-length grouted

15

16 Many types of rock bolts are developed by combining of these two basic bolt types to meet the specific support requirements and geological or geotechnical conditions.

17 There are at least seven different Bolt types commonly used support tailgates: Full length grouted Combination Point-anchored Tensioned with T channel Truss Rebar with truss Double locks

18 Special bolt types such as: Cable bolts Trussers Split sets are designed to counteract such condition

19 Work better than steel bars Less costly Flexible Great facilating material handling Bolt length is no limited by opening geometry Flexibility also allowed horizontal movement( thus reducing tendency to shear)

20 Cables using the reinforce ground before mining Typical highstrength cable bolt

21 Cable bolts are widely used to stabilize slopes

22 Compression zone created by trussers

23 It consists of thin wall steel tube 1,5 inches Installation is very quick Stress imposed on the tube is not very large 3,5 million split sets are used in metal mines per year

24 The effectiveness of the bolt in mobilising the inherent strength of the rock mass depends on several parameters The presence laboratory investigation is aimed at verifying the effect of bolt inclination, type of bounding( full- bounded length and point- anchored) and level of tension on the performance of rock bolt.

25 The shear strengt and dilation versus shear displacement for this joint can be presented as

26 The orientation of bolt to the joint plane has pronounced effect on shear resistance offered by rock bolt. The stabilizing action of a tensioned (active) bolt intersecting a joint can be explained using

27 The main advantage of tensioned bolt is that it increases shear- stiffness of the bolted joint as soon as it is installed. Fast-setting resin permits tensioning of the bolt a few minutes installation.

28 Point anchoraged rock bolt is limited to hard rocks and for use as temporary reinforcement. When cement or resin is fills annulus around the full length of the bar as means of anchorage, the bolt is called full bonded bolt. Full-bonded bolt requires only a small amount of movement in the rock mass to mobilize its anchorage capacity.

29 The anchorage length (L) of rock bolt to maintain stability is calculated based on the following formula: Where, F is factor safety (2<F<3); Tt is ultimate load of rock bolt; D is fixed anchor diameter and τ u/t is ultimate bond stress.

### Module 10 : Improvement of rock mass responses. Content

IMPROVEMENT OF ROCK MASS RESPONSES Content 10.1 INTRODUCTION 10.2 ROCK REINFORCEMENT Rock bolts, dowels and anchors 10.3 ROCK BOLTING MECHANICS Suspension theory Beam building theory Keying theory 10.4

### Double Shear Testing of Bolts

University of Wollongong Research Online Coal Operators' Conference Faculty of Engineering and Information Sciences 23 Double Shear Testing of Bolts N. Aziz University of Wollongong, naj@uow.edu.au D.

### A New Technique to Determine the Load Transfer Capacity of Resin Anchored Bolts

University of Wollongong Research Online Coal Operators' Conference Faculty of Engineering and Information Sciences A New Technique to Determine the Load Transfer Capacity of Resin Anchored Bolts N. Aziz

### Moment Resisting Connections for Load Bearing Walls

PRECAST: MOMENT RESISTING CONNECTIONS Moment Resisting Connections for Load Bearing Walls Manish Khandelwal Sr. Structural Engineer, Building Structures, Sweco India Private Limited Design philosophy for

### Design of structural connections for precast concrete buildings

BE2008 Encontro Nacional Betão Estrutural 2008 Guimarães 5, 6, 7 de Novembro de 2008 Design of structural connections for precast concrete buildings Björn Engström 1 ABSTRACT A proper design of structural

### Rock and bolt properties and load transfer mechanism in ground reinforcement

University of Wollongong Research Online Faculty of Engineering - Papers (Archive) Faculty of Engineering and Information Sciences 2005 Rock and bolt properties and load transfer mechanism in ground reinforcement

### Factors Affecting Pre-Tension and Load Carrying Capacity in Rockbolts - A Review of Fastener Design

University of Wollongong Research Online Coal Operators' Conference Faculty of Engineering and Information Sciences 2018 Factors Affecting Pre-Tension and Load Carrying Capacity in Rockbolts - A Review

### COL504 : SIMPLE USER S GUIDE ON ROOF SUPPORT INSTALLATION AND EVALUATION

FINAL REPORT SIMRAC COL504 : SIMPLE USER S GUIDE ON ROOF SUPPORT INSTALLATION AND EVALUATION Prepared by : Dr J.N. van der Merwe, Itasca Africa (Pty) Ltd Date : 30 November 1998 1 Abstract The report traces

### STABILITY. SECURITY. INTEGRITY.

MODEL 150 HELICAL ANCHOR SYSTEM PN #MBHAT STABILITY. SECURITY. INTEGRITY. 150 Helical Anchor System About Foundation Supportworks is a network of the most experienced and knowledgeable foundation repair

### Numerical Modeling of Grouted Soil Nails

Numerical Modeling of Grouted Soil Nails Dr. Haider S. Al -Jubair Department of Civil Engineering University of Basrah-College of Engineering Basrah, Iraq Afaf A. Maki Department of Civil Engineering University

### Mechanical behavior of fiberglass reinforced timber joints

Mechanical behavior of fiberglass reinforced timber joints Chen, Chi-Jen 1 ABSTRACT The objective of this research is to investigate the mechanical performance of dowel-type timber joints reinforced by

### STRUCTURAL TIMBER DESIGN

STRUCTURAL TIMBER DESIGN to Eurocode 5 2nd Edition Jack Porteous BSc, MSc, DIC, PhD, CEng, MIStructE, FICE Director lack Porteous Consultancy and Abdy Kernlani BSc, MSc, PhD, CEng, FIStructE, FIWSc Professor

### AMTS STANDARD WORKSHOP PRACTICE. Bond Design

AMTS STANDARD WORKSHOP PRACTICE Reference Number: AMTS_SWP_0027_2008 Date: December 2008 Version: A 1 Contents 1 Technical Terms...3 2 Scope...3 3 Primary References...3 4 Basic...3 4.1 Typical joint types...4

### Modelling of Rebar and Cable Bolt Behaviour in Tension/Shear

University of Wollongong Research Online Coal Operators' Conference Faculty of Engineering and Information Sciences 2015 Modelling of Rebar and Cable Bolt Behaviour in Tension/Shear Xuwei Li University

### Reinforcement with Soil Nails

Reinforcement with Soil Nails GEO-SLOPE International Ltd. www.geo-slope.com 1400, 633-6th Ave SW, Calgary, AB, Canada T2P 2Y5 Main: +1 403 269 2002 Fax: +1 403 266 4851 Introduction Soil nailing is a

### Glulam Connection Details

T E C H N I C A L N O T E Glulam Connection Details Note: This version is superseded by a more current edition. Check the current edition for updated design and application recommendations. ENGINEERED

### Support Tutorial. Project Settings. Adding Bolts. Select: File New. Select: Analysis Project Settings. Select: Support Add Bolt

Support Tutorial 4-1 Support Tutorial Bolts may be added to a RocPlane model to evaluate the effect of support on wedge stability. Bolt orientation can be optimized, or the bolt capacity for a required

### MEASURING, UNDERSTANDING, AND IMPROVING THE PERFORMANCE OF FULLY GROUTED RESIN BOLTS IN UNDERGROUND COAL MINES

Southern Illinois University Carbondale OpenSIUC Theses Theses and Dissertations 12-1-2015 MEASURING, UNDERSTANDING, AND IMPROVING THE PERFORMANCE OF FULLY GROUTED RESIN BOLTS IN UNDERGROUND COAL MINES

### Glued laminated timber beams repair.

Glued laminated timber beams repair. Master s Degree Extended Abstract Ricardo Cardoso Henriques da Silva Keywords: glulam, delamination, self-tapping screw, plywood, repair November 2014 1. INTRODUCTION

### TECHNICAL MANUAL. HPM Rebar Anchor Bolt Easy and Fast Bolted Connections

TECHNICAL MANUAL HPM Rebar Anchor Bolt Easy and Fast Bolted Connections Version: PEIKKO GROUP 01/2015 HPM Anchor Bolt For bolted connections System benefits Standardized and approved rebar anchor bolt

### Pull-compression tests on glued-in metric thread rods parallel to grain in different timber species and laminated veneer lumber

COST FP1004 15-17 April 2015 Lisbon, Portugal Pull-compression tests on glued-in metric thread rods parallel to grain in different timber species and laminated veneer lumber Frank Hunger 1, Mislav Stepinac

### Bolts and Set Screws Are they interchangeable?

1903191HA Bolts and Set Screws Are they interchangeable? Prof. Saman Fernando Centre for Sustainable Infrastructure SUT Introduction: This technical note discusses the definitions, standards and variations

### Erstantie 2, FIN Villähde Tel , Fax

www.anstar.eu 2 www.anstar.eu 3 CONTENTS Page 1 PRODUCT DESCRIPTION...4 2 MATERIALS AND STRUCTURE...4 2.1 PRODUCT RANGE...4 2.2 MATERIALS...4 2.3 MANUFACTURING...4 2.4 MANUFACTURING TOLERANCES...4 2.5

### Connection and Tension Member Design

Connection and Tension Member Design Notation: A = area (net = with holes, bearing = in contact, etc...) Ae = effective net area found from the product of the net area An by the shear lag factor U Ab =

### Fasteners. Fastener. Chapter 18

Fasteners Chapter 18 Material taken from Mott, 2003, Machine Elements in Mechanical Design Fastener A fastener is any device used to connect or join two or more components. The most common are threaded

### 2015 BBUGS Suppliers Day Jennmar Queensland Presentation A Review of Cable Support Systems from Jennmar

2015 BBUGS Suppliers Day Jennmar Queensland Presentation A Review of Cable Support Systems from Jennmar AUS Jennmar Company History Review of Jennmar Cable Support Systems Point Anchored Cables Post Grouted

### Sprocket and Hub Bolt Analysis for Slip-Critical Bolted Applications in Mining and Mineral Processing Equipment

Title: Sprocket and Hub Bolt Analysis for Mining and Mineral Processing Case Study Section: FEA Keywords: Bolted joints, bolted connections, slip critical bolt design, bolt preload, FEA of bolted joints,

### Strength Properties of Fibre Glass Dowels Used for Strata Reinforcement in Coal Mines

University of Wollongong Research Online Coal Operators' Conference Faculty of Engineering and Information Sciences 2015 Strength Properties of Fibre Glass Dowels Used for Strata Reinforcement in Coal

### SCREWS WITH CONTINUOUS THREADS IN TIMBER CONNECTIONS

SCREWS WITH CONTINUOUS THREADS IN TIMBER CONNECTIONS Prof. Dr.-Ing. H. J. Blaß, Dipl.-Ing. I. Bejtka Universität Karlsruhe (TH), Germany Abstract Screws, bolts and dowels loaded perpendicular to the fastener

### Experimental Study on Pile Groups Settlement and Efficiency in Cohesionless Soil

Experimental Study on Pile Groups Settlement and Efficiency in Cohesionless Soil Elsamny, M.K. 1, Ibrahim, M.A. 2, Gad S.A. 3 and Abd-Mageed, M.F. 4 1, 2, 3 & 4- Civil Engineering Department Faculty of

### Theory of Structures-I (CE-206)

Theory of Structures-I (CE-206) Course Contents: Introduction to structural analysis o Definition, type of structures, structural idealization, loads, determinacy, indeterminacy and stability of structures

### Moment-Resisting Connections In Laminated Veneer Lumber (LVL) Frames

Moment-Resisting Connections In Laminated Veneer Lumber (LVL) Frames Andy van Houtte Product Engineer-LVL Nelson Pine Industries Nelson, NZ Andy Buchanan Professor of Civil Engineering Peter Moss Associate

### Ground Improvement Prof. G. L. Sivakumar Babu Department of Civil Engineering Indian Institute of Science, Bangalore. Lecture No.

Ground Improvement Prof. G. L. Sivakumar Babu Department of Civil Engineering Indian Institute of Science, Bangalore Lecture No. # 33 Soil Nailing So, what I do is, now I talk about soil nail wall. This

### A new approach in determining the load transfer mechanism in fully grouted bolts

University of Wollongong Research Online University of Wollongong Thesis Collection 1954-2016 University of Wollongong Thesis Collections 2006 A new approach in determining the load transfer mechanism

### Unlimited work preparation of beams & bars

Unlimited work preparation of beams & bars Unlimited work preparation of beams & bars Why limit yourself when everything is possible? Traditionally the design and detailing of a structure was restricted

### 4.0 MECHANICAL TESTS. 4.2 Structural tests of cedar shingles

4.0 MECHANICAL TESTS 4.1 Basis for the test methodology The essence of deterioration is that while it may be caused by insects, weather, fungi or bacteria, the decay is not identical. Further, no two physical

### The predictive model for strength of inclined screws as shear connection in timber-concrete composite floor

The predictive model for strength of inclined screws as shear connection in timber-concrete composite floor F. Moshiri, C. Gerber, H.R. Valipour, R. Shrestha & K.I. Crews Centre for built infrastructure,

### Improved Arcan Shear Test For Wood

Improved Arcan Shear Test For Wood Jen Y. Liu, Robert J. Ross, and Douglas R. Rammer USDA Forest Service, Forest Products Laboratory, 1 Madison, WI, USA Abstract A new shear test fixture design that uses

### Butt Two pieces of wood meeting with flat sides adjoining usually at right angles. Some type of connector is needed to prevent movement.

Wood Connections There are basically five different types of connectors: Interlocking (carpentry joints), Dowel, Metal Connectors, Special Formed Connectors and Adhesives. I Interlocking (Carpentry Joints)

### Bolt Material Types and Grades 1- Bolts made of carbon steel and alloy steel: 4.6, 4.8, 5.6, 5.8, 6.8, 8.8, 10.9 Nuts made of carbon steel and alloy

Bolt Material Types and Grades 1- Bolts made of carbon steel and alloy steel: 4.6, 4.8, 5.6, 5.8, 6.8, 8.8, 10.9 Nuts made of carbon steel and alloy steel: 4, 5, 6, 8, 10, 12 2- Bolts made of stainless

### Evaluation of Roof Bolting Requirements Based on In-Mine Roof Bolter Drilling

Evaluation of Roof Bolting Requirements Based on In-Mine Roof Bolter Drilling (Contract No. ) Project Duration: Dec. 18, 2000 Dec. 17, 2003 Quarterly Technical Progress Report Report Period December 18,

### ANALYSIS OF PILE-RAFT FOUNDATIONS NON- RESTED AND DIRECTLY RESTED ON SOIL

ANALYSIS OF PILE-RAFT FOUNDATIONS NON- RESTED AND DIRECTLY RESTED ON SOIL Elsamny M. Kassem1, Abd EL Samee W. Nashaat2 and Essa. Tasneem.A1 1 Civil Engineering Department, Al-Azhar University, Cairo, Egypt

### Research on Deformation of Soil Nailing Structure with Flexible Facing

2017 International Conference on Transportation Infrastructure and Materials (ICTIM 2017) ISBN: 978-1-60595-442-4 Research on Deformation of Soil Nailing Structure with Flexible Facing Tao Sun 1, Yanfeng

### The Behaviour Of Round Timber Sections Notched Over The Support On The Tension Face. Justin Dewey

The Behaviour Of Round Timber Sections Notched Over The Support On The Tension Face Justin Dewey Need for research In Queensland there are approximately 400 timber bridges still in use. Very little research

### Lawrence A. Soltis, M. and Robert J. Ross, M. 1

REPAIR OF WHITE OAK GLUED-LAMINATED BEAMS Lawrence A. Soltis, M. and Robert J. Ross, M. 1 Abstract Connections between steel side plates and white oak glued-laminated beams subjected to tension perpendicular-to-grain

### Development, Trials and Testing of a Two Componet Rapid Set Cement Grouting System

University of Wollongong Research Online Coal Operators' Conference Faculty of Engineering and Information Sciences 2018 Development, Trials and Testing of a Two Componet Rapid Set Cement Grouting System

### Evaluation of In-Pavement Light Fixture Designs and Performance

Evaluation of In-Pavement Light Fixture Designs and Performance Presented to: IES ALC Fall Technology Meeting By: Joseph Breen Date: Background In-Pavement Light Fixture Assemblies Utilize a Circle of

### Prying of a Large Span Base Plate Undergoing a Moment Load Applied by a Round Pier

Prying of a Large Span Base Plate Undergoing a Moment Load Applied by a Round Pier by Anastasia Wickeler A thesis submitted in conformity with the requirements for the degree of Masters of Applied Science

### 2016 AASHTO BRIDGE COMMITTEE AGENDA ITEM: 24 (REVISION 1) SUBJECT: LRFD Bridge Design Specifications: Section 6, Various Articles (2)

2016 AASHTO BRIDGE COMMITTEE AGENDA ITEM: 24 (REVISION 1) SUBJECT: LRFD Bridge Design Specifications: Section 6, Various Articles (2) TECHNICAL COMMITTEE: T-14 Steel REVISION ADDITION NEW DOCUMENT DESIGN

### Anti-check bolts as means of repair for damaged split ring connections

Anti-check bolts as means of repair for damaged split ring connections Quenneville, J.H.P. 1 and Mohammad, M. 2 ABSTRACT There are numerous large span timber hangars dating back to the Second World War.

### GLOSSARY OF TERMS SECTION 8

GLOSSARY OF TERMS SECTION 8 Anchor Bolt Angle Base Plate Bay Blocking CCB Centerline Chord Cladding Clip Closure Strip An A-307 steel bolt embedded in the concrete footing to anchor the base plate of the

### Evaluating methods of underground short encapsulation pull testing in Australian coal mines

University of Wollongong Research Online Coal Operators' Conference Faculty of Engineering and Information Sciences 2014 Evaluating methods of underground short encapsulation pull testing in Australian

### Name two reasons why bridges are built. Name two places where you would find a bridge?

Name two reasons why bridges are built. Name two places where you would find a bridge? Before bridges were invented how would an individual travel across a large span of land or huge masses of water Objectives:

### Experimental Study on the Seismic Behavior of Retrofitted Concrete Infill

ORIGINAL ARTICLE Received 22 Jun. 2014 Accepted 01 Sep. 2014 Copyright 2014 Scienceline Publication Journal of Civil Engineering and Urbanism Volume 4, Issue 5: 515-521 (2014) ISSN-2252-0430 Experimental

### THE EFFECT OF THREAD GEOMETRY ON SCREW WITHDRAWAL STRENGTH

THE EFFECT OF THREAD GEOMETRY ON SCREW WITHDRAWAL STRENGTH Doug Gaunt New Zealand Forest Research Institute, Rotorua, New Zealand ABSTRACT Ultimate withdrawal values for a steel 16mm diameter screw type

### SEA SELF DRILLING, THREADED, HOLLOW BAR / GROUT-ABLE SOIL NAILS / ANCHORS

SEA SELF DRILLING, THREADED, HOLLOW BAR / GROUT-ABLE SOIL NAILS / ANCHORS THE SEA SYSTEM SEA hollow T threaded bar Rock Anchors / Soil Nails provide the ultimate solution for securing unstable embankments

### Dowel-type fasteners. Timber Connections. Academic resources. Introduction. Deferent types of dowel-type fasteners. Version 1

Academic resources Timber Connections Dowel-type fasteners Version 1 This unit covers the following topics: Deferent types of dowel-type fasteners Introduction There are four criteria designers should

### STRUCTURAL ATTACHMENTS

Brace Structural Attachment Selection Procedure ) Determine structure to be attached to from the following: A) Concrete B) Wood Beam C) Structural Steel 2) Reference structure connection type from Appendix

### WOODEN BUILDINGS 6.1 INTRODUCTION 6.2 TYPICAL DAMAGE AND FAILURE OF WOODEN BUILDINGS. Chapter 6

Chapter 6 WOODEN BUILDINGS 6.1 INTRODUCTION Wood has higher strength per unit weight and is, therefore, very suitable for earthquake resistant construction. But heavy cladding walls could impose high lateral

PILES Long, slender members that transmit foundation loads through soil strata of low bearing capacity or through water to deeper soil or rock strata having a high bearing capacity. End bearing piles End

### CCFSS Technical Bulletin

CCFSS Technical Bulletin Vol. 12, No. 1 February 2003 FREQUENTLY ASKED QUESTIONS CONCERNING THE AISI BASE TEST METHOD AND THE USE OF THE AISI ANCHORAGE EQUATIONS Answers Provided by the AISI Task Committee

### nineteen Wood Construction 1 and design APPLIED ARCHITECTURAL STRUCTURES: DR. ANNE NICHOLS FALL 2016 lecture STRUCTURAL ANALYSIS AND SYSTEMS ARCH 631

APPLIED ARCHITECTURAL STRUCTURES: STRUCTURAL ANALYSIS AND SYSTEMS DR. ANNE NICHOLS FALL 2016 lecture nineteen wood construction and design Wood Construction 1 Timber Construction all-wood framing systems

### EXAMINATION PAPER NUMBER OF PAGES: 5

EXAMINATION PAPER SUBJECT: CHAMBER OF MINES OF SOUTH AFRICA CERT. IN STRATA CONTROL (COAL) SUBJECT CODE: COMCSC EXAMINATION DATE: 4 OCTOBER 007 TIME: 09h00-1h00 EXAMINER: L MUNSAMY MODERATOR: B MADDEN

### Connection Philosophy. p NDS Chapter-by-chapter description Changes from previous editions Examples. Part 1: Member Design Webinar.

Outline ASD and LRFD with the 2005 NDS Part 2 Connection Design Presented by: John Buddy Showalter, P.E. Vice President, Technology Transfer Connection philosophy p NDS Chapter-by-chapter description Changes

### Product design: Structural systems

Product design: Structural systems Tension and compression The arch bridge and the aerial ropeway in the panels below were designed to resist specific loads and forces. The arch has to resist the load

### Optimum Design of Nailed Soil Wall

INDIAN GEOTECHNICAL SOCIETY CHENNAI CHAPTER Optimum Design of Nailed Soil Wall M. Muthukumar 1 and K. Premalatha 1 ABSTRACT: Nailed wall is used to support both temporary and permanent structures. The

### REINFORCEMENT DESIGN FOR METAL BUILDING SYSTEMS

REINFORCEMENT DESIGN FOR METAL BUILDING SYSTEMS By Donald L. Johnson, P.E. RETROFIT PROJECTS CAN BE NECESSARY FOR ANY NUMBER OF REASONS, though change in use is one of the most common. Change of use can

### Analysis of stress and deformation fields of shape complex beams

Analysis of stress and deformation fields of shape complex beams Miroslav Pástor 1, Pavol Lengvarský 1,* Department of Applied Mechanics and Mechanical Engineering, Faculty of Mechanical Engineering, Technical

### Sample Size and Sample Strength Effects on Testing the Performance of Cable Bolts

University of Wollongong Research Online Coal Operators' Conference Faculty of Engineering and Information Sciences 2016 Sample Size and Sample Strength Effects on Testing the Performance of Cable Bolts

### CONSIDERATIONS IN THE OPTIMISATION OF BENCH FACE ANGLE AND BERM WIDTH GEOMETRIES FOR OPEN PIT MINES

CONSIDERATIONS IN THE OPTIMISATION OF BENCH FACE ANGLE AND BERM WIDTH GEOMETRIES FOR OPEN PIT MINES W.H. Gibson, I.A. de Bruyn and D.J.H. Walker SRK Consulting, Australasia ABSTRACT The inclination of

### COLUMN 11/2013 LINEAR STRUCTURAL ELEMENT

11/2013 LINEAR STRUCTURAL ELEMENT OÜ TMB Element produces linear structural elements with the product name column in conformity with the standard EVS-EN 13225 Precast concrete products. Linear structural

### PART MATERIALS. Section Fencing Materials. Description

PART 03000 - MATERIALS Section 03010 - Fencing Materials Description 03010.00 Scope - This section consists of the test requirements, specifications and tolerances for barbed wire, woven wire and chain

### Sutton Screened in Awning / Porch

Sutton Screened in Awning / Porch Sections: Project Overview Roof Work Cedar Framing Canopy Frame Screen Frames Misc. Sheet 1 - - - Index Sheet 2 - - - Project Summary Sheet 3 - - - Roof Work overview

### Product Guide Specification

Halfen USA, Inc. July 2014 8521 FM 1976 PO Box 547 Converse, Texas 78109 Toll Free 800-423-9140 Fax 877-683-4910 Website www.halfenusa.com Email info@halfenusa.com Product Guide Specification Specifier

### Installation Instructions for Solar Snow Pad (SSP-T-3)

Installation Instructions for Solar Snow Pad (SSP-T-3) Warning- Do not use this product on solar arrays where the calculated array snow loads exceed 50 pounds per square foot (psf). Most solar panels are

### EFFECTS OF GEOMETRY ON MECHANICAL BEHAVIOR OF DOVETAIL CONNECTION

EFFECTS OF GEOMETRY ON MECHANICAL BEHAVIOR OF DOVETAIL CONNECTION Gi Young Jeong 1, Moon-Jae Park 2, KweonHwan Hwang 3, Joo-Saeng Park 2 ABSTRACT: The goal of this study is to analyze the effects of geometric

### CH # 8. Two rectangular metal pieces, the aim is to join them

CH # 8 Screws, Fasteners, and the Design of Non-permanent Joints Department of Mechanical Engineering King Saud University Two rectangular metal pieces, the aim is to join them How this can be done? Function

### SECTION EXPANSION FITTINGS AND LOOPS FOR HVAC PIPING

SECTION 230516 - EXPANSION FITTINGS AND LOOPS FOR HVAC PIPING PART 1 - GENERAL 1.1 RELATED DOCUMENTS A. Drawings and general provisions of the Contract, including General and Supplementary Conditions and

### Essex County College - West Essex Campus Addition And Renovations dlb # / SECTION EXPANSION FITTINGS AND LOOPS FOR HVAC PIPING

SECTION 230516 - EXPANSION FITTINGS AND LOOPS FOR HVAC PIPING PART I - GENERAL 1.1 RELATED DOCUMENTS A. Drawings and general provisions of the Contract, including General and Supplementary Conditions and

### 3.1 General Provisions

WOOD FRAME CONSTRUCTION MANUAL 107 3.1 General Provisions 3.1.1 Prescriptive Requirements The provisions of this Chapter establish a specific set of resistance requirements for buildings meeting the scope

### Comparison of behaviour of laterally loaded round and squared timber bolted joints

Focussed on Modelling in Mechanics Comparison of behaviour of laterally loaded round and squared timber bolted joints Antonín Lokaj, Kristýna Klajmonová VŠB echnical University of Ostrava, Faculty of Civil

### HEALTH MONITORING OF ROCK BOLTS USING ULTRASONIC GUIDED WAVES

HEALTH MONITORING OF ROCK BOLTS USING ULTRASONIC GUIDED WAVES C. He 1, J. K. Van Velsor 2, C. M. Lee 2, and J. L. Rose 2 1 Beijing University of Technology, Beijing, 100022 2 The Pennsylvania State University,

### AN IMPROVED SHEAR TEST FIXTURE USING THE IOSIPESCU SPECIMEN

AMD-VOl. 231/MD-VOl. 85 Mechanics of Cellulosic Materials 1999 ASME 1999 ABSTRACT AN IMPROVED SHEAR TEST FIXTURE USING THE IOSIPESCU SPECIMEN Jen Y. Liu, Dwight D. Flach, Robert J. Ross, and Gary J. Lichtenberg

### Expanding the Frontiers of Geotechnical Engineering

Expanding the Frontiers of Geotechnical Engineering Software development is not an exact science. When a new version of a Rocscience program is being planned, what are the decisions that have to be made

What's New 2018 R2 Table of Contents ADVANCE BIM DESIGNERS CONCRETE SERIES... 4 REINFORCED CONCRETE FOOTING DESIGNER... 4 Multi-layer soil calculation... 4 Bottom Constructive Reinforcement... 5 REINFORCED

### FiReP GRP Bolts. Bolting systems for mining and tunnelling. Solutions from Materials Technology

FiReP GRP Bolts Bolting systems for mining and tunnelling Solutions from Materials Technology FiReP GRP Bolts overview In comparison to aluminium or steel, glass fibre reinforced plastics (GRP) have advantages

### BRACING BRACING SECTION 7 SECTION 7

If we are to learn from the past, it is clear that there is generally a lack of understanding of the purpose of roof bracing and who should be responsible for it. This has led to disputes, claims and,

### Nonlinear behavior of Reinforced Concrete Infilled Frames using ATENA 2D

Available online at www.ijacskros.com Indian Journal of Advances in Chemical Science S1 (2016) 173-178 Nonlinear behavior of Reinforced Concrete Infilled Frames using ATENA 2D M. D. Raghavendra Prasad,

### New Instrument for Rock Bolt Inspection Using Guided Waves

11th European Conference on Non-Destructive Testing (ECNDT 2014), October 6-10, 2014, Prague, Czech Republic New Instrument for Rock Bolt Inspection Using Guided Waves More Info at Open Access Database

### CONCEALED HOOK CONNECTORS UV-T / UV-C

CONCEALED OOK CONNECTORS / UV-C GEOMETRY Choice of connection system according to the secondary joist cross section SECONDARY JOIST [] SECONDARY JOIST DEPT [] 300 250 200 150 100 50 0 0 200 400 600 800

### Friction Grip in Wellheads: An Innovative Approach to Load Support & Sealing

Friction Grip in Wellheads: An Innovative Approach to Load Support & Sealing Brent Harrald Principal Engineer Plexus Ocean Systems Ltd. December 2009 Page 1 Table of Contents Introduction Plexus Ocean

### Simplified analysis of timber rivet connections

Simplified analysis of timber rivet connections Stahl, Douglas C., 1 Begel, Marshall, 2 and Wolfe, Ronald W. 3 ABSTRACT Timber rivets, fasteners for glulam and heavy timber construction, have been used

### CHARACTERISTICS OF LUMBER-TO-LUMBER FRAMING CONNECTIONS IN LIGHT-FRAME WOOD STRUCTURES

CHARACTERISTICS OF LUMBER-TO-LUMBER FRAMING CONNECTIONS IN LIGHT-FRAME WOOD STRUCTURES Andi Asiz 1*, Lina Zhou 1, Ying Hei Chui 1 ABSTRACT: Connections are arguably the most important part of light-frame

### MECH 344/M Machine Element Design

1 MECH 344/M Machine Element Design Time: M 14:45-17:30 Lecture 6 Contents of today's lecture Introduction Multitude of fasteners are available raging from nuts and bots to different varieties. Only a

### REHABILITATION OF A STEEL PENSTOCK

ABSTRACT One of the 29 hydroelectric stations owned and operated by the Tennessee Valley Authority (TVA) is a two-unit plant with vertical Francis turbines. The water passageways for these units consist

### PRO LIGNO Vol. 11 N pp

FINITE ELEMENT SIMULATION OF NAILED GLULAM TIMBER JOINTS Mats EKEVAD Luleå University of Technology Division of Wood Science and Engineering SE-931 87 Skellefteå, Sweden Tel: +46 910 585377; E-mail: mats.ekevad@ltu.se

### DOWEL ACTION OF TITANIUM BARS CONNECTING MARBLE FRAGMENTS AT DIFFERENT ANGLES

13 th International Brick and Block Masonry Conference Amsterdam, July 4-7, 2004 DOWEL ACTION OF TITANIUM BARS CONNECTING MARBLE FRAGMENTS AT DIFFERENT ANGLES E.Vintzileou 1, E.-E.Toumbakari 2 Abstract

### 1. In the Y direction: to the vertical axis of the wall (middle of the wall)

Installation of TENLOC Panel Connectors Precast Factory Installation of the TENLOC The is placed into the reinforcement of the wall and attached to the mold with nails. The wall thickness must be minimum