Simulation Experiment Study on Law of Gob Roof Fall Based on Gas Drainage

摘要：

In order to offer references for design of gob gas drainage with high-level long borehole, the laws of gob roof crack generation, fracture, fall and separation layer are analyzed with simulation experiment and key strata theory. Bending deformation of key strata under goes the course of slowness→acuteness→slowness→ fracture with the advance of working face, The bending and subsidence scopes of subordinate key strata are obviously smaller than those of major key strata. The elastic deformation of both side rock strata under key stratum will recover; and their subsidence will rebound after the fracture of key strata. Caving angles of roofs among key strata are different because of the differences of the load-bearing effect of key strata and mechanical characters of rock strata. The fracture of overlying key stratum results in decrease of the roof caving angle and the increase of periodic caving span and weighting intensity. The ultimate position and overlap distance of gas drainage boreholes can be determined based on fracture configuration of key strata roof caving angle and periodic caving span, and gas drainage effect of boreholes can be also forecasted.

关键词： mining engineering gas drainage gob roof fall key strata simulation experiment

作者: XIE Wen-bing LOU Pei-jie JING Sheng-guo LI Tao

作者单位: State Key Lab of Coal Resources and Safe Mining, China University of Mining and Technology, Xuzhou 2 School of Mines, China University of Mining and Technology, Xuzhou 221008, China

会议类型: 国际会议

会议名称: The 2nd International Conference on Mine Safety and Environment Protection(第二届采矿、安全与环境保护国际会议)

会议地点: 西安

会议语种:英文

页码: 290-298

在线出版日期: 2011-10-10（万方平台首次上网日期，不代表论文的发表时间）