煤层群底部巷道围岩破坏机理及控制技术

Failure Mechanism and Control Technology of Roadway Surrounding Rock Below Coal Seam Group

摘要: 针对山西大同晋华宫煤矿11^#煤层8714工作面运输巷在掘进期间出现片帮、底鼓等严重矿压显现现象，采用理论分析和数值模拟等方法，探讨了煤层群底部煤层巷道围岩变形破坏机理，并提出了相应的控制技术。

Abstract: According to the problems of rib spalling and heaving floor and serious mine pressure behavior phenomenon occurred during the excavation of 8714 haulage roadway in 11^# coal seam of Jinhuagong Mine, methods of theoretical analysis and numerical simulation were adopted in this paper. The failure mechanism of roadway surrounding rock below coal seam group was firstly studied, and then the corresponding control technologies were proposed.