厚硬顶板宽煤柱临空巷道冲击地压防治技术研究

为研究厚硬顶板宽煤柱临空巷道冲击地压致灾机理，以彬长矿区文家坡矿4104工作面为工程背景，采用理论分析、数值模拟、现场监测等方法，研究分析了两次回采扰动下宽煤柱垂直压力分布状态及覆岩活动规律，得出了该矿工作面集中动、静载荷的演化机制及冲击地压致灾机理。针对4104工作面临空巷道44.5m宽煤柱及顶板以上20m处厚硬砂岩岩层，设计了基于帮部煤体爆破卸压及顶板深孔爆破预裂卸压的动静载荷分源治理补强方案，通过微震监测结果分析，相比措施调整前临空巷道围岩活动性降低了95%，防治效果显著。

Rock burst control technology for gob-side roadway with thick and hard roof and wide coal pillar

In order to study the disaster-causing mechanism of rock burst in wide-pillar gob-side entry with thick and hard roof,taking the 4104 working face of a mine in Binchang mining area as the engineering background,theoretical analysis,numerical simulation,field monitoring and other methods were used to study and analyze the vertical pressure distribution of the wide-pillar and the law of overlying rock activity under two mining disturbances,and the evolution mechanism of concentrated dynamic and static loads and the disaster-causing mechanism of rock burst in the working face of the mine were obtained.Aiming at the thick and hard sandstone strata of 44.5 m wide coal pillar and 20 m above the roof in 4104 working face,the dynamic and static load source separation treatment and reinforcement scheme based on the blasting pressure relief of the coal body in the rib,and the pre-splitting pressure relief of the roof deep hole blasting is designed.According to the microseismic monitoring results,the surrounding rock activity of the empty roadway is reduced by 95%compared with that before the adjustment of the measures,and the control effect is remarkable.