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以运河煤矿6303孤岛工作面开采过程中,第2带式输送机顺槽联络巷过BF7大断层时巷道围岩控制问题为工程背景,运用FLAC~(3D)软件模拟孤岛、断层及采动应力场对联络巷的影响,分析断层附近出现塑性区和应力集中的区域,以此确定过断层时巷道需要加强支护的范围。在此基础上,提出在应力集中区内采取“锚网索带架”联合支护。
In the process of mining the 6303 island face of the Yunhe coal mine, the control of the surrounding rock of the laneway when the second belt conveyor passes through the BF7 large fault in the gateway is the engineering background. FLAC 3D software is used to simulate the island, fault and mining stress Field influence on the contact lane, the plastic zone and the stress concentration zone near the fault are analyzed to determine the range of the roadway that needs strengthening support when the fault passes. On this basis, it is proposed to adopt “anchor net tie belt support” in the stress concentration area.