Relationship between Developed Degree of Joints and Roof Caving Risk in Bolting Roadway
Considered on broken degree of the roof strata of bolting roadway, roadway were divided into four sorts according to developed degree of joints. Using of large-size Discrete Element soft ware and based on theory of Newtons second law, the stress fields of four sorts of roof rocks and anchoring block which put forward above were analyzed and simulated. That stress level is higher on completer anchoring block in the developed joints zone in the roof has been pointed out. On the same time, what the important component of anchoring block-roof bolt and its load size is as direct ratio as developed degree of roof joint has been presented. The method offers monitoring object for forecasting risk of caving roof which supported by the bolt and establishes the new path to monitor supported quality of the bolt in roadway.
developed degree of joints stress state of anchoring-block roof casualty roof bolt
Zhang Ruhai Liu Shaowei Ma Nianjie
School of Resource and safety China University of Mining Technology(Beijing), Beijing China 100083;F School of Energy Science and Engineering,Henan Polytechnic University Jiaozuo,Henan China 454003 School of Resource and safety China University of Mining Technology(Beijing), Beijing China 100083
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
655-660
2007-04-17（万方平台首次上网日期，不代表论文的发表时间）