双回撤通道冲击地压防治技术研究与应用

doi:10.11799/ce202203014

摘要/Abstract

摘要： 针对冲击地压矿井的回撤通道易发生失稳破坏，工作面采动过程中对于回撤通道的影响进行了分析，并结合现场数据分析了双回撤通道内支架压力变化情况，制定针对性防治措施并进行了效果分析。研究结果表明：回撤通道的失稳破坏受工作面采动影响，当工作面剩余长度距离主回撤通道越近时，回撤通道的支承压力越大，巷道两帮的压力越集中，巷道越容易发生失稳破坏。基于主回撤通道易失稳破坏的特点对其顶板预裂爆破效果进行了分析，在预裂爆破后，爆破区域的应力变化幅度明显降低，说明顶板预裂爆破可降低回撤通道受工作面采动影响产生的应力集中。同时，也起到了将采空区应力传递路径阻断和本工作面的超前支承压力传递路径的弱化作用。

关键词: 冲击地压, 双回撤通道, 失稳破坏, 预裂爆破

Abstract: In view of the deformation and failure of the withdrawal channel of the rock burst mine, the influence on the withdrawal roadway in the mining process of the working face is analyzed, and the change of the support pressure in the double withdrawal channel is analyzed combined with the field data, Formulate targeted prevention and control measures and analyze the effect. The results show that the deformation and failure of the withdrawal roadway are affected by the mining of the working face. When the remaining length of the working face is closer to the main withdrawal channel, the greater the bearing pressure of the withdrawal channel and the more concentrated the pressure on the two sides of the roadway, the more prone the roadway to deformation and failure. Based on the characteristics of easy deformation and damage of the main withdrawal channel, the effect of roof presplitting blasting is analyzed. After presplitting blasting, the range of stress variation in the blasting area is significantly reduced, indicating that roof presplitting blasting can reduce the stress concentration of the withdrawal channel affected by the mining of the working face. At the same time, it also blocks the stress transmission path in the goaf and weakens the transmission path of advance bearing pressure in the working face.

中图分类号:

TD325

秦喜文, 牟亮, 韩刚, 吕玉磊. 双回撤通道冲击地压防治技术研究与应用[J]. 煤炭工程, 2022, 54(3): 73-78.

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