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针对海孜矿1026运输巷发生冲击矿压的工程背景,基于关键层理论,采用FLAC3D数值模拟,分析巨厚火成岩作用下工作面周围支承压力的变化规律,从采动应力集中的大小和影响范围解释发生冲击矿压的原因。研究结果表明:已采1024工作面帮部残余支承压力和现采1026工作面超前支承压力形成叠加,叠加后的应力大小和影响范围显著增加,应力影响范围到达了1026运输巷所在的位置,从而诱发了冲击矿压的发生。根据研究结果,采用监测与防治相结合的办法,先监测出煤岩体的冲击性,然后钻孔释放煤体中积聚的弹性能,消除应力升高区,从而减小煤层发生冲击灾害的几率。
In view of the engineering background of rockburst occurring in 1026 transport lane of Haizi mine, based on the key layer theory, FLAC3D numerical simulation is used to analyze the variation of bearing pressure around the working face under megalithic igneous rock. From the viewpoints of the size of mining induced stress and its influence range Explain the cause of rock burst. The results show that the residual abutment pressure of 1024 working face and the advanced bearing pressure of the existing mining face 1026 are superposed, and the stress magnitude and the influence range after superposition increase significantly, and the influence range of stress reaches the position of 1026 transportation lane. Induced the occurrence of rock burst. According to the research results, a combination of monitoring and control is adopted to firstly monitor the impact of coal and rock mass, and then drill holes to release the elastic energy accumulated in the coal and eliminate the stress riser so as to reduce the probability of impact and disasters in the coal seam. .