高应力特厚突出煤层水力割缝卸压防突技术研究  

Research on hydraulic slotting technology for pressure relief and outburst prevention in high-stress and extra-thick outburst coal seam

作　　者：王想刚 张世范 许继宗 张吉福 陈国红[3,4] 陈玉东 马占海 WANG Xianggang;ZHANG Shifan;XU Jizong;ZHANG Jifu;CHEN Guohong;CHEN Yudong;MA Zhanhai(Yaojie Coal and Electricity Group Corporation,Lanzhou,Gansu 730084,China;Gansu Energy Chemical Industry Co.,Ltd.,Baiyin,Gansu 730913,China;State Key Laboratory of Gas Disaster Monitoring and Emergency Technology,Shapingba,Chongqing 400037,China;CCTEG Chongqing Research Institute,Shapingba,Chongqing 400037,China)

机构地区：[1]窑街煤电集团有限公司,甘肃省兰州市730084 [2]甘肃能化股份有限公司,甘肃省白银市730913 [3]瓦斯灾害监控与应急技术国家重点实验室,重庆市沙坪坝区400037 [4]中煤科工集团重庆研究院有限公司,重庆市沙坪坝区400037

出　　处：《中国煤炭》2024年第10期48-56,共9页China Coal

摘　　要：针对采动形成的高应力煤柱区瓦斯动力灾害防控难题,以窑街煤电集团有限公司金河煤矿16219工作面为工程背景,综合采用数值模拟、理论分析、微震分析、工程实践相结合的研究方法,揭示了煤柱区的应力演化规律,在分析水力割缝卸压增透原理的基础上,优化并实施了水力割缝卸压增透措施,并对卸压防突效果进行了考察。结果表明,受周边采动影响,16219工作面首分层开切眼及回风巷交叉区域的煤体出现了高应力集中现象;通过对常规掘进与开挖缝槽后掘进2种情况的模拟对比分析,表明开挖缝槽能有效缓解高应力集中区内巷道周边煤体的应力集中状况;针对均一的缝槽尺寸可能导致巷道周边形成小范围应力增高区的现象,进一步优化了高应力集中区的水力割缝参数,合理增加了巷道周边水力割缝钻孔的出渣量。割缝作业实施后,微震监测数据显示大能量事件的占比有所减少、小能量事件的占比增加,煤体的弹性能有所释放,测试煤层残余瓦斯含量降低至4.73 m^(3)/t,表明煤层的突出及冲击危险性均有所降低。In response to the difficulty of preventing and controlling of gas dynamic disasters in the high stress coal pillar area formed by mining,taking the 16219 working face of Jinhe Coal Mine in Yaojie Coal and Electricity Group Corporation as the engineering background,a research method combining numerical simulation,theoretical analysis,microseismic analysis,and engineering practice was comprehensively adopted to reveal the stress evolution law of the coal pillar area.Based on the analysis of the principle of hydraulic slotting to relieve pressure and increase permeability,hydraulic slotting measures to relieve pressure and increase permeability were optimized and implemented,and the effect of pressure relief and outburst prevention was investigated.The research results indicated that due to the influence of surrounding mining,high stress concentration occurred in the coal body at the intersection area of the first layer open-off cut and return air roadway in the 16219 working face.Through simulation and comparative analysis of conventional excavation and excavation after slotting,it was shown that slotting could effectively alleviate the stress concentration of coal around the roadway in high stress concentration areas;in response to the phenomenon that uniform slot size might lead to the formation of a small-scale stress increase zone around the roadway,the hydraulic cutting parameters of the high stress concentration zone were further optimized,and the slag output of the hydraulic cutting boreholes around the roadway was appropriately increased.After the cutting operation was implemented,microseismic monitoring data showed that the proportion of high-energy events decreased and the proportion of low-energy events increased,and the elastic energy of the coal body was released.The residual gas content of the tested coal seam decreased to 4.73m^(3)/t,indicating that the risk of coal seam outburst and impact was reduced.

关 键 词：特厚突出煤层 高应力煤柱区 超高压水力割缝 卸压增透措施 

分 类 号：TD713[矿业工程—矿井通风与安全]