Numerical Simulation for Protection Range of Steep Inclined Upper-Protective Layer of Pitching Oblique Mining

摘要：

Aiming at the problem of determining the protection range of steep inclined upper-protective layer of pitching oblique mining, based on the method of three-dimensional fast Lagrange method and the geological properties and physico-mechanical parameters of roof and floor rock strata of protective layer, the dynamic development process of stress distribution and deformation of protected coal seam with exploitation of steeply inclined protective seam of pitching oblique mining are simulated. Besides, the law of the stress and normal deformation are analyzed with the advance of upper protective layer coalface. According to the protection criterion of stress relief criterion and normal deformation criterion of protected seam, the protection angle on the dip and strike are ascertained. The result shows that the protection angles on the upper and bottom dip direction are 81.5 ° and 74 °, respectively; while the protection angle on strike direction are variational, ranging from 30 ° to 52 °; the largest protection angle is in the middle pitching oblique coalface. By comparison with the field investigation, the result of the numerical simulation is consistent with the field investigation. This research provides significant reference value to the prevention of coal and gas outburst with the same mining condition.

关键词： numerical simulation upper-protective layer pitching oblique mining protection range

作者: YUAN Zhigang WANG Hongtu FAN Xiaogang LIU Nianping LIU Jingcheng

作者单位: Key Laboratory for Exploitation of China Southwestern Resources and Environmental Disaster Control Engineering, Ministry of Education, Chongqing University, Chongqing 400030, China

会议类型: 国际会议

会议名称: The 2010 International Symposium on Safety Science and Technology(2010 安全科学与技术国际会议)

会议地点: 杭州

会议语种:英文

页码: 2535-2541

在线出版日期: 2010-10-26（万方平台首次上网日期，不代表论文的发表时间）