Technology Study and Practice on Safe Simultaneous Mining of Ultra Short Distance Seams
Seam mining with ultra short distance to other seam is one of the most primary ways of recycling resources in Yang Yi coal mine, and there are two coal seams which are Daqing and Xiajia in exploitation area.The thickness of shale interbed is about 0.45～1.5m between Daqing and XiaJia coal seams. In the process of mining, Daqing coal and Xiajia coal which belong to the same section and simultaneous mining interact with each other, so the determination of reasonable staggered distance has become a critical factor of safety mining. Through the analysis of stope strata-pressure behaviors and roof structure, staggered distance is reasonable when it is 25~30m. This essay has done the numerical simulation and statistics of falling height, height of crack belt, peak of leading abutment pressure of stope overlying rock in different ways of stope mining staggered distance through the FLAC3D software, and it comes up that Xiajia coal seam shows the minimal influence on Daqing coal seam when both coal seams mine simultaneously. According to the reasonable staggered distance of working face and concrete conditions of field construction, safety mining has succeeded by adapting reasonable mining technology and relevant safety supporting measures.
ultra short distance seams safety mining the reasonable staggered distance mining technology
YANG Bensheng QIAO Yanguo LUO Feng LIU Chao
College of Resource, Hebei University of Engineering, Handan 056038, Hebei, China
国际会议
The 2010 International Symposium on Safety Science and Technology(2010 安全科学与技术国际会议)
杭州
英文
1343-1347
2010-10-26（万方平台首次上网日期，不代表论文的发表时间）