Research on Sublevel Coals Failure and Displacement of Eztremely Thick Seams Mining Face
Based on advancing abutment and displacements site measurements method, the extremely thick coal seaM mined in 21121 fully mechanized sublevel caving longwall working face of Qianqiu Mine, is studied in detail. It can be seemed from site measurements results that the advancing abutment zone of 21121 working face is longer, and that the interval of top coal can generate apparent abscission layers. On the basis of analysis of these characters, the advancing abutment zone with the maximum scope of 90m is divided into initial compression and plastic deformation zone, strong compression and damage zone, roofs rotation action and supports action zone. Also the sublevel coal with the average thickness of llm above support is divided into roof action layer and short beam structure layer and supports action layer. Whats important, the mechanic model of the short beam layer which is vital to successful sublevel mining is built and studied, which can do great benefit to extremely thick coal seams high efficient mining.
sublevel caving mining eztremely thick coal seam short beam structure
Nan Hua Zhou ying Xu Tao
Department of Resources Science and Engineering, Henan Polytechnic University, Jiaozuo 454000, China Research Center for Numerical Tests on Material Failure, Dalian University, Dalian 116622 China
国际会议
The 3rd International Symposium on Modern Mining & Safety Technology Proceedings(第三届现代采矿与安全技术国际学术会议)
辽宁阜新
英文
79-82
2008-08-04（万方平台首次上网日期，不代表论文的发表时间）