Numerical simulation research on control joint slide and separation of coal roadway roof with pre-tensioned bolt supporting
In coal roadway stratiform roof, joint slide and separation are the main forms of roof deformation failure and chiefly results in caving accident. By means of ANSYS, interlayer-pressure, as well as interlayer-friction pressure, interlayer-sliding distance, separation displacement changing rule, and roadway displacement distribution regularities were analyzed and obtained before and after bolting. The results show that the pre-tensioned rock bolts increase the interlayer-pressure and interlayer-friction pressure which is the strengthening mechanics for stratiform roof of roadway. Thereby the interlayer-sliding distance, the value of roof separation and the roadway displacement all are reduced. So pre-tensioned bolting is an effective way to improve joint roof stability.
coal roadway joint rock mass pre-tensioned rock bolts separation FEM numerical simulation
WANG Tongxu WANG Wenbin ZHANG Zhenyu QI Yuliang WANG Rongchao
Key Laboratory of Mine Disaster Prevention and Control, Shandong University of Science and Technology, Qingdao, 266510, China
国际会议
The 2007 International Symposium on Safety Science and Technology(2007采矿科学与安全技术国际学术会议)
河南焦作
英文
625-629
2007-04-17（万方平台首次上网日期，不代表论文的发表时间）