断层影响区煤厚变异带对煤岩动力灾害的影响分析
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摘要
为了揭示临近断层与煤厚变异区煤岩瓦斯动力灾害频发现象,以潘一矿的典型煤与瓦斯突出事故为工程背景,采用现场实践与数值模拟相结合的方法,研究了断层与煤厚变异区叠加影响下煤岩动力灾害发生的力学机制,揭示了工作面靠近断层由厚向薄煤层开采与远离断层由薄煤向厚煤层开采的采场应力场的分布规律,提出了靠近断层且由厚向薄煤层开采更易诱发煤岩瓦斯动力灾害的观点。
To reveal the frequent occurrence of coal-rock gas dynamic disasters in the adjacent fault and coal-thickness variation area, based on the typical coal and gas outburst accident in Panyi Coal Mine, the mechanical mechanism of coal and rock dynamic disaster under the influence of superposition of fault and coal thickness variation area was studied by combining field practice and numerical simulation. The distribution laws of stress field that the working face mined from thick to thin coal seam near the fault and the face mined from thin to thick coal seam away from the fault were revealed. The view that the face mined from thick to thin coal seam near the fault is easier to induce dynamic disasters of coal and rock gas was proposed.
To reveal the frequent occurrence of coal-rock gas dynamic disasters in the adjacent fault and coal-thickness variation area, based on the typical coal and gas outburst accident in Panyi Coal Mine, the mechanical mechanism of coal and rock dynamic disaster under the influence of superposition of fault and coal thickness variation area was studied by combining field practice and numerical simulation. The distribution laws of stress field that the working face mined from thick to thin coal seam near the fault and the face mined from thin to thick coal seam away from the fault were revealed. The view that the face mined from thick to thin coal seam near the fault is easier to induce dynamic disasters of coal and rock gas was proposed.
引文
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[2]吕进国,王涛,丁维波,等.深部开采逆断层对冲击地压的诱导机制[J].煤炭学报,2018,43(2):405-416.
[3]郝国军.鹤壁矿区煤与瓦斯突出地质控制因素分析[J].中州煤炭,2014(7):100-102.
[4]李志华.采动影响下断层滑移诱发煤岩冲击机理研究[D].徐州:中国矿业大学,2009.
[5]孟召平,彭苏萍,冯玉,等.断裂结构面对回采工作面矿压及顶板稳定性的影响[J].煤田地质与勘探,2006,34(3):24-27.
[6]孟召平,彭苏平,黎洪.正断层附近煤的物理力学性质变化及其对矿压分布的影响[J].煤炭学报,2001,26(6):561-566.
[7]孙振武.煤厚局部变化区域地应力场分布的数值模拟[J].矿山压力与顶板管理,2003,20(3):95-100.
[8]赵同彬,郭伟耀,谭云亮,等.煤厚变异区开采冲击地压发生的力学机制[J].煤炭学报,2016,41(7):1659.
[9]宋卫华,张宏伟,徐秀茹.区域构造应力场的数值模拟与应用[J].辽宁工程技术大学学报,2006(1):39-42.