Study on Key Strata of Hard and Soft Composite Roofs and Their Breaking Intervals

摘要：

In order to control the rock pressure around coal face, it is necessary to determine the key strata and their breaking intervals. Taking Baijiao Coal Mine as an example, the key strata and their breaking intervals of hard and soft composite roofs are determined by using three methods which contain analog simulation experiment, key strata theory and numerical simulation. The results show that the first hard strata, the second hard strata and the third hard strata which break one after another are the inferior key strata. The fourth to the sixth hard strata are the combined key strata, and the average breaking interval of roof is 114m. Breakage of the key strata over the coal face leads to behavior of rock pressure when it is progressed at 108.2m. The application of engineering practice indicated that, through properly combined of the three methods, the key strata and their breaking intervals of hard and soft composite roofs can accurately be determined. Besides, the results provide references to coal face support and rock pressure control.

关键词： mining engineering combined roof key strata numerical simulation breaking interval of roof rock pressure

作者: FAN Xiaogang HU Guozhong JIA Jianqing HE Jianming LI Xiaohong WANG Hongtu

作者单位: Key Lab for Exploitation of China Southwestern Resources & the Environmental Disaster Control Engine Key Lab for Exploitation of China Southwestern Resources & the Environmental Disaster Control Engine Department of Engineering Mechanics, Chongqing Institute of Technology, Chongqing 400050, China

会议类型: 国际会议

会议名称: The 2007 International Symposium on Safety Science and Technology(2007采矿科学与安全技术国际学术会议)

会议地点: 河南焦作

会议语种:英文

页码: 318-323

在线出版日期: 2007-04-17（万方平台首次上网日期，不代表论文的发表时间）