GEO-TECHNICAL ENGINEERING DIRECTORATE
m) Pull out test on Rock Bolts shall be performed as per IS: 11309-1985 – Method for conducting Pull-Out Test on Anchor Bars and Rock Bolts. - Minimum three pull out tests shall be conducted in one rock formation as mentioned in clause 4.8 of IS: 11309-1985 or as per the instructions of Engineer-in-charge.
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Swellex Rock Bolts, Swellex Bolts -ZongXiang
Swellex rock bolts can easily be pull tested. In fact, a Swellex rock bolt has the easiest pull test operation of any rock bolt type. Swellex Applications: Swellex rock bolts are extremely versatile and can be used in a variety of excavation, from tunneling to mining. A very typical application in tunneling is to use Swellex as pattern bolts to ...
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[PDF] Analysis of Swellex bolt performance and a ...
Corpus ID: 117194665. Analysis of Swellex bolt performance and a standardized rockbolt pull test datasheet and database @inproceedings{Soni2000AnalysisOS, title={Analysis of Swellex bolt performance and a standardized rockbolt pull test datasheet …
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(PDF) Performance of Grouted Rock Bolts in Rock Mass
Distribution of Shear stress along a grouted rock bolt during pull out test. (After Li & Stillborg, 1999). Distribution of axial load along a grouted rock bolt during pull out test.
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APPENDIX 3 STATE-OF-THE-ART AND PHYSICAL PROPERTIES …
Gilman, Colorado, used rock bolts to support the large openings which housed its underground mill constructed during the late 1920's. The Anaconda Mining Company of Butte, Montana, began making rock bolt installations in 1939. In that year, an exhaust air crosscut was rock bolted and shotcreted at the time it was driven. The crosscut was still ...
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Analytical analysis of pullout resistance of the hydraulic ...
Kilic A, Yasar E, Celik AG (2002) Effect of grout properties on the pull-out load capacity of fully grouted rock bolt. Tunnelling and Underground Space Technology 17: 355–362. DOI: 10.1016/S0886-7798(02)00038-X. Article Google Scholar Kim SH, Pelizza S, Kim JS (2006) A study of strength parameters in the reinforced ground by rock bolts ...
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LOAD CAPACITY OF GROUTED ROCK BOLTS DUE TO …
analyses. Therefore, field tests have been performed on rock bolts that been in service for 50 years. A previously developed test rig had been modified in this project to register both load and deflection of the pull-out test. The test rig consists of a hydraulic jack that presses a cylinder towards the rock surrounding the bolt.
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Introduction of Mechanical Dynamic bolts as part of ...
walls) using resin grouted 8 ft long D-Bolts as part of the dynamic support system. • Initially, considered to use 8 ft long super swellex bolts (MN-24) as an alternate to D-Bolts. However, the idea was dropped in view of the fact that super swellex bolts are relatively weak in shear.
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Practical Rock Engineering Chapter 14 Rockbolts and Cables
than the bolt otherwise the bail will be dislodged by being forced against the end of the hole. Once the assembly is in place, a sharp pull on the end of the bolt will seat the anchor. Tightening the bolt will force the cone further into the wedge thereby increasing the anchor force.
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Secoroc Rock Drilling Tools SWELLEX ROCK BOLTS
Swellex pull test equipment ... It is a unique rock bolt, as it is made out of a welded tube folded onto itself and sealed at one extremity. It is re-expanded using a high pressure water flow provided by a special pump and adapter. The bolt is expanded inside the borehole drilled
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Rock bolt and anchoring - SlideShare
Rock bolt and anchoring 1. 14 Rockbolts and cables 14.1 Introduction Rockbolts and dowels have been used for many years for the support of underground excavations and a wide variety of bolt and dowel types have been developed to meet different …
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Safety in Swellex | Epiroc
personnel completed onsite training on the Swellex bolts installation and inflation arm instruction using both the PSP 300RDP air operated pump and H1 hydraulic Swellex pumps. Part of the product offering was to train Technicore personnel in the use of our pull test equipment for both the PM12 and MN24 Swellex bolts.
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Chapter 1.0 Introduction
The mechanical anchor bolt consists of a smooth bar with a threaded anchor end. A mechanical shell anchor attached to the threaded end of the bolt is used to anchor the system. When a torque is applied to the bolt, the force drives a plug against the outer shell, which then expands and sets against the rock in the borehole walls (Figure 2-2).
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Safety in Swellex | Epiroc US
personnel completed onsite training on the Swellex bolts installation and inflation arm instruction using both the PSP 300RDP air operated pump and H1 hydraulic Swellex pumps. Part of the product offering was to train Technicore personnel in the use of our pull test equipment for both the PM12 and MN24 Swellex bolts.
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(PDF) Inflatable Rock Bolt Bond Strength vs. Rock Mass ...
Soni, A, "Analysis of Swellex Bolt Performance and a standardized rockbolt pull-test datasheet and database," M.S. Thesis, Department of Civil Engineering, University of Toronto (2000). Ground ...
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Thiessen Pull Test Kit 30 TEAM
• Suitable for tensioning Dywidag threadbar and testing virtually all types of rockbolts and soil nails • When testing Split Set, Swellex, or forged head bolts, the pull collar must be put onto the bolt BEFORE installation of the bolt • 30 ton units available for sale or rent • …
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Rock Bolt / Anchor (Elements) in situ Pull Out Test 54 ...
Rock Bolt / Anchor (Elements) in situ Pull Out Test (Method for Conducting Pull Out Test on Anchor Bars and Rock BoltsIS 11309 reaffirmed 2016) (The rock anchors are of various types and are manufactured by different agencies.The anchor pull-out test is done to get assistance in design and acceptance after installation.
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Pull Out Test For Rock Bolts [k6nq6j98eplw]
1. Basic verification pull-out test 2. Performance pull-out test The main difference between the two pullout tests are in the test loads. In the basic verification test, the test load is taken as 80 % of the yield load of the bolt. In the performance test, the test load taken as 133% of working load of the rock bolt.
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ANALYSIS OF SWELLEX BOLT PERFORMANCE STANDARDIZED …
Standardized Rock Bolt Pull Test Database. Thanks also to Francois Charette and Mario Bureau of Ltd. (the manufacturer of the Swellex bolt), for their assistance and for providing the background information regarding Swellex bolts and pull testing. I would also like to thank the
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Rockbolt Tensile Loading Across a Joint
tests as a means of testing and comparing different rock bolt types. One obvious deficiency being that a standard pull-out test simply does not provide the load-deformation characteristics of a rockbolt subjected to loading across a joint in the rock, a situation for which rockbolts are ... than the bolt whereas the Swellex is expande~ inside the
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Tension Jack/Pull Test Kit - DSI Underground Canada
The pull test kit consists of two assemblies: a mechanical assembly which includes a claw, stand, nut, & spindle; a hydraulic assembly which includes a hollow core ram, hand pump, gauge, & hose; The gauge measures pressure, which is easily converted into tons of load; Suitable for testing virtually all types of rock bolts and soil nails
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Swellex Rock Bolts, Rock Bolts-ZongXiang
Swellex rock bolts can easily be pull tested. In fact, a Swellex rock bolt has the easiest pull test operation of any rock bolt type. Swellex Applications: Swellex rock bolts are extremely versatile and can be used in a variety of excavation, from tunneling to mining. A very typical application in tunneling is to use Swellex as pattern bolts to ...
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Pullout Test on Fully Grouted Bolt Sheathed by Different ...
In order to evaluate the anchorage performance of rebar bolt sheathed by different length of segmented steel tubes, a total of eight groups of pullout tests were conducted in this study. The steel tubes, segmented by 5 cm, 7 cm, 9 cm, 10 cm, and 15 cm, utilized in current study were bonded together by a high performance two-component adhesive to form standard 30 cm …
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Analysis of Inflatable Rock Bolts | SpringerLink
An inflatable bolt is integrated in the rock mass through the friction and mechanical interlock at the bolt–rock interface. The pullout resistance of the inflatable bolt is determined by the contact stress at the interface. The contact stress is composed of two parts, termed the primary and secondary contact stresses. The former refers to the stress established during bolt installation and ...
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New Anchorage Capacity Testing System and Pull-Out ...
Several types of rock bolt testing systems, such as destructive, non-destructive and overcoring tech niques, have been developed for understanding the working principle of a rock bolt in different rock masses. The pull-out test is a typical destructive test performed for determining the anchorage capacity of …
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University of Nevada, Reno A Study of Correlations between ...
A Study of Correlations between Rock Bolt Pull-Out Tests and Rock Mass Rating Scores in ... Rock bolt pullout testing is a common method of testing the strength of ground support in ... though primarily rock bolt types are Swellex bolts manufactured by . The Swellex rock bolt is …
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Rock bolts 2009.ppt | Screw | Mechanical Engineering
TYPES 0F ROCKBOLTS B. Friction Anchored Rock Bolts (heavily jointed rock) perlu wire mesh/shotcrete Split-set & Swellex 1. Swellex - collapsed tube, expanded in drillhole with water pressure Pull-out resistance dependent on applied water
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Montana Tech tests bolt integrity with Epiroc - MINING.COM
As part of the test, sleeves will be used on bolts to qualify the critical bond length of Swellex bolts under forced displacement without loss of integrity in …
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Factors influencing the effectiveness of split set ...
size, drive time, driver equipment, time elapsed from installation to test, rock type, rock quality (RMR), specific bolt application and pull-out, or slip load. Some of this information will be discussed subsequently in greater detail. The full data list is given in Appendix C. Split Set Specifications Split Set model SS33 SS39 SS46
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Swellex Rock Bolting System | Rock Reinforcement | Epiroc
Rock bolts. Since its introduction 30 years ago the Swellex expandable rock-bolting system has gained wide recognition in the mining and tunneling industry. This unique rock bolt consists of a welded tube folded in upon itself, sealed at one end. It is re-expanded using a high pressure water flow provided by a special pump and adapter.
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GEO-TECHNICAL ENGINEERING DIRECTORATE
Pull out test on Rock Bolts shall be performed as per IS: 11309-1985 – Method for conducting Pull-Out Test on Anchor Bars and Rock Bolts. - Minimum three pull out tests shall be conducted in one rock formation as mentioned in clause 4.8 of IS: 11309-1985 or as per the instructions of Engineer-in-charge.
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Montana Tech puts Epiroc Swellex bolts to the test ...
As part of the test, sleeves will be used on bolts to qualify the critical bond length of Swellex bolts under forced displacement without loss of integrity in the bolts. The Pull Test Kit supplied will be essential to testing the bolts' load and deformation characteristics in …
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