Study on Pressure-relief Law of Protective Seam Mining for Coal Seams with High Gas

摘要：

Pressure-relief process of overlying strata caused by protective seam mining was simulated by using FLAC3D numerical method. The results indicate that, along the advance direction of the protective seam working face, the stress contour is arch shape, and the top of arch forms a horizontal line gradually with the advancing of the protective face, while saddle shape along the working face tendency. And our analysis reveals that there is O-shape pressurerelief fracture circle in the protected seam, which provides theoretical basis for the selection of gas drainage position. The results of pressure-relief law are of great significance to gas drainage engineering practice.

关键词： Coal seams gas Protective seam mining Pressure-relief law Numerical simulation Gas drainage

作者: XIAO Tongqiang FAN Kegong YU Yang LIU Guolei

作者单位: School of mines, China University of Mining and Technology, Xuzhou 221008, Jiangsu, China State Key State Key Laboratory of Coal Resources and Safe Mining, China University of Mining and Technology, X School of Mechanics and Civil Engineering, China University of Mining and Technology, Beijing 100083

会议类型: 国际会议

会议名称: 2010 International Conference on Mine Hazards Prevention and Control(第二届矿山灾害预防与控制国际学术会议 ICMHPC)

会议地点: 青岛

会议语种:英文

页码: 193-200

在线出版日期: 2010-10-15（万方平台首次上网日期，不代表论文的发表时间）