综放开采条件下沿空掘巷煤柱留设尺寸数值模拟分析
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摘要
为了增强沿空掘巷巷道的稳定性,提高资源回采率,本文以大同矿区塔山煤矿8204工作面为研究背景,对沿空掘巷留设区段煤柱的合理宽度进行了研究。通过模拟实验结果得出:区段煤柱的宽度在5~10m时,巷道处于低应力区,支护相对稳定。将理论计算和数值模拟相结合,同时参考塔山矿综放工作面矿压显现规律及微地震监测得出的相关结论,综合考虑巷道跨度大、隔绝采空区瓦斯等安全因素,确定了特厚煤层综放工作面沿空掘巷留设区段煤柱的合理宽度。
In order to improve the stability of the wall rock around the gob-side entry drift and the utilization of coal resources, take Datangtashan Colliery in Datong mining area as a research object, the reasonable width of segment coal-pillar for the gob-side entry drift in ultra-thick coal seam fully mechanized caving face is studied in this paper. The result of numerical stimulation shows that when the width of segment coal-pillar is 5~10 meters, roadway is in the low stress area and the support would be effective. Considering the ground pressure law and the result of microseismic monitoring, taking roadway and gas into account, define the reasonable width of segment coal-pillar.
In order to improve the stability of the wall rock around the gob-side entry drift and the utilization of coal resources, take Datangtashan Colliery in Datong mining area as a research object, the reasonable width of segment coal-pillar for the gob-side entry drift in ultra-thick coal seam fully mechanized caving face is studied in this paper. The result of numerical stimulation shows that when the width of segment coal-pillar is 5~10 meters, roadway is in the low stress area and the support would be effective. Considering the ground pressure law and the result of microseismic monitoring, taking roadway and gas into account, define the reasonable width of segment coal-pillar.
引文
[1]高明仕,张农,成隆.综放沿空掘巷窄煤柱合理宽度的确定[J].矿山压力与顶板管理,2004(3):4-7.
[2]钱鸣高,石平五.矿山压力与岩层控制[M].徐州:中国矿业大学出版社,2003:201-204.
[3]杨吉平.沿空掘巷合理窄煤柱宽度确定与围岩控制技术[J].辽宁工程技术大学学报,2012,32(1):39~43.
[4]韩承强,张开智,徐小兵,等.区段小煤柱破坏规律及合理尺寸研究[J]采矿与安全工程学报,2007,24(3):370-373.
[5]柏建彪,王卫军,候朝炯,等.综放沿空掘巷围岩控制机理及支护技术研究[J].煤炭学报,2000,25(5):478-481.
[6]宋振骐.实用矿山压力[M].徐州:中国矿业大学出版社,1988:41-78.
[7]成云海,姜福兴,庞继禄.特厚煤层综放开采采空区侧向矿压特征及应用[J].煤炭学报,2012,37(7):1088-1093.
[8]候朝炯,马念杰.煤层巷道两帮煤体应力和极限平衡区的探讨[J].煤炭学报,1989,14(4):21~29.
[9]谢广祥,杨科,刘全明.综放面倾向支承压力分布规律研究[J].岩石力学与工程学报,2006,25(3):545~549.
[10]吴永平.大同矿区特厚煤层综放采场矿压显现规律研究[J].煤炭科学技术,2008,36(1):8-10.
[11]孔令海,姜福兴,刘杰,等.特厚煤层综放工作面区段煤柱合理宽度的微地震监测[J].煤炭学报,2009,34(7).
[2]钱鸣高,石平五.矿山压力与岩层控制[M].徐州:中国矿业大学出版社,2003:201-204.
[3]杨吉平.沿空掘巷合理窄煤柱宽度确定与围岩控制技术[J].辽宁工程技术大学学报,2012,32(1):39~43.
[4]韩承强,张开智,徐小兵,等.区段小煤柱破坏规律及合理尺寸研究[J]采矿与安全工程学报,2007,24(3):370-373.
[5]柏建彪,王卫军,候朝炯,等.综放沿空掘巷围岩控制机理及支护技术研究[J].煤炭学报,2000,25(5):478-481.
[6]宋振骐.实用矿山压力[M].徐州:中国矿业大学出版社,1988:41-78.
[7]成云海,姜福兴,庞继禄.特厚煤层综放开采采空区侧向矿压特征及应用[J].煤炭学报,2012,37(7):1088-1093.
[8]候朝炯,马念杰.煤层巷道两帮煤体应力和极限平衡区的探讨[J].煤炭学报,1989,14(4):21~29.
[9]谢广祥,杨科,刘全明.综放面倾向支承压力分布规律研究[J].岩石力学与工程学报,2006,25(3):545~549.
[10]吴永平.大同矿区特厚煤层综放采场矿压显现规律研究[J].煤炭科学技术,2008,36(1):8-10.
[11]孔令海,姜福兴,刘杰,等.特厚煤层综放工作面区段煤柱合理宽度的微地震监测[J].煤炭学报,2009,34(7).
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