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针对深井综采工作面断层区域冲击灾害频发的现状,研究了断层区域力学作用机制,提出动静载叠加诱发冲击的原理。数值分析了综采工作面断层区域动静载叠加对巷道的冲击破坏效应,结果表明:工作面断层区域的高静载与矿震产生的高动载叠加,促使煤岩体所受应力超过其强度极限而发生失稳破坏;断层区域顶板断裂幅频中的主频成分主要分布在0~40 Hz。分析制订了冲击危险的控制对策,保证综采工作面断层区域安全回采。
Aiming at the current situation of frequent impact disasters in the fault area of deep fully mechanized coal mining face, the mechanics mechanism of the fault area is studied, and the principle of dynamic and static load stacking plus induced impact is proposed. The results show that the high static load in the fault zone of the working face and the high dynamic load superimposed by the mine shock cause the stress of the coal and rock mass to exceed the strength limit The main frequency component in the amplitude of the roof fracture of the fault area is mainly distributed in 0 ~ 40 Hz. Analyzed and formulated the control strategy of impact danger to ensure safe mining in the fault area of fully mechanized coal mining face.