Numerical simulation of protection scope and stress analysis in lower protective seam mining of multiple coal seams

摘要：

　　Taking certain coal mine No.5-2 coal seam for the study, combined with physical and mechanical parameters and geological characteristics of coal strata roof and floor of No.5121 working face protective seam, the paper uses UDEC simulation software to simulate overburden movement law of different stages in the process of lower protective seam mining of multiple coal seams as well as stress field and expansion deformation characteristics of the protected multiple coal seams, and protection scope of upper protected seams is defined in the paper.The simulation results show that: when the working face advancing to 70 m, the protected seam No.6-1 has an expansivity of 25 ‰.No.5-2 protective seam under the conditions of full exploitation, relief angles of up and down are 79°, 77° in the coal seam inclination.

关键词： multiple coal seams lower protective seam numerical simulation protection scope

作者: LOU Ya-bei LIU Jian ZHANG Ming-lei

作者单位: School of Mining and Safety, Anhui University of Science and Technology, Huainan 232001, China;Key Laboratory of Safety and High-efficieny Coal Mining ,Ministry of Education, Anhui University of Science and Technology, Huainan 232001, China

会议类型: 国际会议

会议名称: International Mining Conference 2014(2014国际采矿论坛)

会议地点: 安徽淮南

会议语种:英文

页码: 411-416

在线出版日期: 2014-09-19（万方平台首次上网日期，不代表论文的发表时间）