Hard Tectonic Structure Control Effect on Coal Stress and Gas in Heading Face

摘要：

　　To analyze the control effect of the hard tectonic structure to the coal stress and gas in coal heading face,two physical mechanical model are established:the normal coal heading and the hard tectonic structure containing coal seam heading.Then the numerical simulation analysis is carried but using the rock fracture finite element software RF-PA2D-GAS,which has solid-gas coupling analysis module.Finally,it gives two field examples to describe the simulating results.The results show that:The hard tectonic structure increases the range of the stress concentration zone and the degree of the stress gradient in coal heading face;Like a closed gate,the stress concentration zone further reduces the gas permeability of the influenced coal in the stress concentration zone.This seriously limits the normal migration of the gas form the deeper part to the free face and forms a very high gas pressure gradient near the hard tectonic structure;So,the hard tectonic structure provides favorable conditions for the occurrence of coal and gas outburst.

关键词： coal heading stress concentration gas pressure gradient permeability coal and gas outburst

作者: Zhang Chunhua

作者单位: College of Mining and Technology, Liaoning Technical University, Huludao, 125105, China;Postdoctoral Scientific Research Workstation, Shanxi Coking Coal, Taiyuan , 030022, China

会议类型: 国际会议

会议名称: International Symposium on Rock Mechanics and Mine Dynamic Disaster Prevention(岩石力学与矿井动力灾害防治国际学术研讨会)

会议地点: 辽宁阜新

会议语种:英文

页码: 128-134

在线出版日期: 2013-07-13（万方平台首次上网日期，不代表论文的发表时间）