Numerical Simulation Research on Surrounding Rock Activities in Shallow Coal Seam Face
The typical shallow seam mining will lead to pressure strongly. Unlike the general stope roof collapsing down layer by layer to form lenitive pressure, the typical shallow seam mining has cutting roof directly to the surface which causes the surface step-style sink. The movement of roof is distinctive and hard to control, easy to lead to damage equipment and endanger safety of the workers. So the research on surrounding rock activities and strata behavior of shallow coal seam is great significance in safety and production. The mining face NO.24205 in Tong Gonggou mine is shallow seam mining. FLAC3D numerical simulation is carried out to study strike and incline stress distribution during mining. The simulation results combining mine pressure monitoring results show that the pressure strength is low and stress concentration factor is less in the mining condition of the shallow seam. It is different from pressure behavior in typical shallow seam. It is proposed that mining pressure behavior is related to except for buried depth, influence on overlying strata nature, strata occurrence characteristics, mining equipment, mining craft and face parameters and other factors.
shallow seam FLAC3D numerical simulation stress concentration factor
CHEN Ying YU Lei LAN Tianwei
College of resource and environment engineering, Liaoning technical university, Fuxin 123000, Liaoni China Coal Research Institute, Beijing 100013, 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
1618-1622
2010-10-26（万方平台首次上网日期，不代表论文的发表时间）