会议专题

Study on Cross-layer Stress Shell Mechanical Model of Water-inrush from Coal Seam Floor

North Type coalfields in China, due to the lower Carboniferous coal from near the Ordovician limestone, coal mine threatened by the karst water, especially water-inrush phenomenon. In this paper, the nonlinear three-dimensional computer laboratory simulation of stress distribution on the coal floor features in-depth research and found that there is mining floor formed by the concentrated stress crosslayer stress shell, the stress load on the shell is the pressure of overlying rock temporary structures, the stress ellipsoid shell base is more concentrated stress area, the stress ellipsoid shell morphology and stress concentration and structure of the mining field. According to the numerical simulation experiment showed that the stress shell shape equation, the stress analysis of cross-layer shell shell base, shell and shell top shoulder instability mode, pointing out that shell has experienced shoulder of the joint breaking, breaking the maximum bottom depth of the shoulder in the shell position, the shoulder when the shell reaches the maximum failure depth, mining lead rise cracks and fissures through the original, this time is easy to form when water burst; shell top, along with the height of the continuous development of cross-layer shell to form a stress in a semi-closed state halfshell, then turn coal mining floor fracture aquifer to form water-inrush.

cross-layer stress shell structure of the mining field water-inrush from seam floor surrounding rock structural instability

ZHANG Wen-zhong HUANG Qing-xiang

Xian University of Science and Technology, Xian 710054, China Xian Branch of China Coal Research Xian Branch of China Coal Research Institute, Xian 710054, China

国际会议

The 2nd International Conference on Mine Safety and Environment Protection(第二届采矿、安全与环境保护国际会议)

西安

英文

299-304

2011-10-10(万方平台首次上网日期,不代表论文的发表时间)