Journal Published Online: 02 March 2018
Volume 41, Issue 3

A New Laboratory Short Encapsulation Pull Test for Investigating Load Transfer Behavior of Fully Grouted Cable Bolts

CODEN: GTJODJ

Abstract

A new laboratory short-encapsulation pull test was developed to better understand load transfer behavior of fully grouted cable bolts that are commonly used in underground mines. Within the embedment section, a series of tests was performed to examine the effect of confining medium diameter on the maximum bearing capacity of cable bolts. A bearing plate appropriate for the investigation of bond failure at both cable/grout and grout/rock interfaces was designed. To prevent a cable bolt from rotating during the pull-out process, a system of locking keys and nuts was integrated into the design to couple together the holder tube, anchor tube, and bearing plate while still allowing axial movement of the cable bolt. Three experiments were conducted. First, different termination methods were used and compared to evaluate the effect of termination instruments on the performance of cable bolts. Then, the confining medium was subjected to a range of preconfinement pressures to determine its effect on cable bolt performance. And finally, the effect of borehole roughness on the pull-out behavior of plain and modified cable bolts was investigated. Once the testing environment was determined, pull-out tests were undertaken on plain and modified cable bolts in a medium-strength material.

Author Information

Chen, Jianhang
School of Mining Engineering, University of New South Wales, Sydney, New South Wales, Australia
Hagan, Paul C.
School of Mining Engineering, University of New South Wales, Sydney, New South Wales, Australia
Saydam, Serkan
School of Mining Engineering, University of New South Wales, Sydney, New South Wales, Australia
Pages: 13
Price: $25.00
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Details
Stock #: GTJ20170139
ISSN: 0149-6115
DOI: 10.1520/GTJ20170139