Rockburst mechanism in soft coal seam within deep coal mines  

作　　者：Zhang Junfei Jiang Fuxing Yang Jianbo Bai Wushuai Zhang Lei 

机构地区：[1]School of Civil and Environmental Engineering, University of Science & Technology Beijing, Beijing 100083, China

出　　处：《International Journal of Mining Science and Technology》2017年第3期551-556,共6页矿业科学技术学报（英文版）

基　　金：Financial supports for this work by the National Program on Key Basic Research Project (No.210CB226800);the National Natural Science Foundation of China (Nos.51274022 and 51174016)

摘　　要：A number of rockburst accidents occurring in soft coal seams have shown that the rockburst mechanism involved in soft coal seams is significantly different from that involved in hard coal seams. Therefore, the method used to evaluate rockburst in hard coal seams is not applicable to soft coal seams. This paper established an energy integral model for the rockburst-inducing area and a friction work calculation model for the plastic area. If the remaining energy after the coal seam is broken in the rockburstinducing area is greater than the friction work required for the coal to burst out, then a rockburst accident will occur. Mechanisms of ‘‘quaking without bursting" and ‘‘quaking and bursting" are clarified for soft coal seams and corresponding control measures are proposed as the optimization of roadway layouts and use of ‘‘three strong systems"(strong de-stressing, strong supporting, and strong monitoring).A number of rockburst accidents occurring in soft coal seams have shown that the rockburst mechanism involved in soft coal seams is significantly different from that involved in hard coal seams. Therefore, the method used to evaluate rockburst in hard coal seams is not applicable to soft coal seams. This paper established an energy integral model for the rockburst-inducing area and a friction work calculation model for the plastic area. If the remaining energy after the coal seam is broken in the rockburstinducing area is greater than the friction work required for the coal to burst out, then a rockburst accident will occur. Mechanisms of ＂quaking without bursting＂ and ＂quaking and bursting＂ are clarified for soft coal seams and corresponding control measures are proposed as the optimization of roadway layouts and use of ＂three strong systems＂ （strong de-stressing, strong supporting, and stron（ monitoring）.

关 键 词：Soft coal seam ROCKBURST Plastic zone Elastic strain energy Friction work 

分 类 号：TD771[矿业工程—矿井通风与安全]