Ezperimental study on top coals failure law of eztremely thick seams mining face

摘要：

Based on similar analog experiments on top coals displacement, the extremely thick coal seam mined in 21121 fully mechanized top caving longwall working face of Qianqiu mine, is studied in detail. It can be found that top coal above support is classifie I as the roofs rotation action layer and short beam structure layer and support action layer. Also it can be found that the thicker of top coal, the three layers are more clear. Whats important, the mechanic model of the short beam layer which is vital to successful top mining is built and studied, which can do great benefit to extremely thick coal seams high efficient mining.

关键词： fully mechanized face top caving mining eztremely thick coal seam three layers structure high production

作者: Hua Nan Guangtao Deng Tao Xu

作者单位: 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

会议类型: 国际会议

会议名称: 2009煤矿瓦斯灾害预防与控制国际研讨会(International Symposium on Prevention and Control of Gas Disaster in Coal Mine 2009)

会议地点: 重庆

会议语种:英文

页码: 342-346

在线出版日期: 2009-05-20（万方平台首次上网日期，不代表论文的发表时间）