ICGCM Papers:
New Roof Support Product Developments
 
 
A Comprehensive Analysis of Cable Bolt Anchorage Characteristics
32nd International Conference on Ground Control in Mining
A Comprehensive Analysis of Cable Bolt Anchorage Characteristics
by
Dakota D. FaulknerThomas M. CookJohn C. Stankus, Jennmar Corporation, Inc, Pittsburgh, United States
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[Conference] 32nd International Conference on Ground Control in Mining
[Price] Free  [Comments] 0
[Topical Area] New Roof Support Product Developments
[Author] Dakota D. FaulknerThomas M. CookJohn C. Stankus, Jennmar Corporation, Inc, Pittsburgh, United States
[Abstract] 
Key Conclusions:
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The anchorage capacity versus the linear length of encapsulation of the various forms of cable bolts was determined as well as the other cable characteristics. This is instrumental in determining the capabilities of each type of cable bolt so that the mine operator estimate a confidence factor in their cable bolt ground supports.
Key Findings:
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The anchorage capacity versus the linear length of encapsulation, Ability to effectively mix resin, Off-axis capacity associated with angle bolting, Effects of reverse spinning on installation, & Effects of long term creep were all determined from the summation of tests for each respective form of cable.
Objective of the Paper:
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Keystone Mining Services, LLC, the affiliate engineering company of Jennmar Corporation, has conducted a variety of highly controlled tests which were developed to closely model actual underground installations. These tests will compare the five commonly used cable bolt varieties including plain, bird caged, buttoned, epoxy coated, and indented seven strand cable through a multitude of tests. The tests will determine the following performance characteristics for each respective cable: (1) anchorage capacity per linear length of encapsulation, (2) ability to effectively mix resin, (3) off-axis capacity associated with angle bolting, (4) effects of reverse spinning on installation, and (5) effects of long term creep. This paper will detail the laboratory testing and compare the analysis of each result.
Problem Statement:
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The market today maintains a range of cable bolt varieties for the end user. Over the years the increased volume of cables bolts is from the constant improvement on safety, mines being developed in difficult geologic conditions, and longer lifespans of underground mines. These factors have led to the development of new designs for cable bolts: Non-Tensioned, Post-Tensioned, Tensionable, and Fully Grouted. Now cable bolts can be produced with multiple birdcages, no birdcages, and indented (dimple) cable without birdcages. Each cable bolt maintains a precise installation procedure and is implemented in certain mining conditions. However, to date there has not been a thorough analysis comparing the performance characteristics of each respective cable type with real world installations.