Journal Title
Title of Journal: Environ Earth Sci
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Abbravation: Environmental Earth Sciences
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Publisher
Springer Berlin Heidelberg
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Authors: Haijian Su Hongwen Jing Honghui Zhao Liyuan Yu Yingchao Wang
Publish Date: 2017/02/21
Volume: 76, Issue: 4, Pages: 179-
Abstract
Rock mass in the fault fracture zone has some characteristics such as low strength and poor selfstability so the control mechanism of stability has been a difficulty in the research of underground engineering A set of laboratory simulation method of fault fractured rock mass is developed to reflect the natural forming process of fault fracture zone Compared with intact rock mass the fault fractured rock mass has an obvious degradation in strength and deformation parameters and the degradation index is between 2279 and 8406 The bolt has a certain supporting effect on the fault fractured rock mass and in the situation of end anchoring the greater the pretightening force is the better the enforcement effect will be The stress field produced by high pretightening force can relieve the stress concentration around the bolt hole and make the initial cracks of rock mass away from the bolt plate The evolution curve of bolt axial force in the process of uniaxial compression of largescale specimen shows four stages which are the initial compression stage prepeak joint loadbearing stage postpeak joint loadbearing stage and the residual stage Research results could provide some theory reference for the stability control of rock mass in the fault fracture zoneThis study is financed by the National Program on Key Basic Research Project 973 Program Grant No 2013CB036003 the National Natural Science Foundation of China Grant Nos 51134001 51579239 51374198 41572263 and 51323004 and the China Postdoctoral Science Foundation 2016M590518
Keywords:
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