特厚煤层综放采场瓦斯运移规律
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摘要
采用高精度微地震监测技术,结合岩石力学理论进行分析,得到了特厚煤层综放工作面采场围岩破裂规律。根据综放采场瓦斯运移规律和工作面超前煤体的百米钻孔瓦斯自然涌出量的现场实测,确定了导致工作面超限的瓦斯主要来自于采空区,给出了可抽放瓦斯的范围。通过分析岩层运动规律与工作面瓦斯浓度变化规律,证明工作面瓦斯的涌出主要受高位岩层周期运动的影响。
Using the underground high precision microseismic monitoring system,analyzed the gas emission laws,combining rock mechanics and rock pressure theory,extra-thick coal seam of the top-coal caving face rock movement and the relationship between gas emission were studied.Monitoring results show the distribution laws of three-dimensional fracture and the movement of strata,thus the reasonable scope of gas drainage can be pointed out.Meanwhile,natural gas emission measurement of the 100 meters drilling site show that a large number of overrun gas mainly transfer from the goaf area.Comparative study on rock movement and the gas concentration changes show that face gas emission is primarily affected by the periodic fracture of the high altitude roof.
Using the underground high precision microseismic monitoring system,analyzed the gas emission laws,combining rock mechanics and rock pressure theory,extra-thick coal seam of the top-coal caving face rock movement and the relationship between gas emission were studied.Monitoring results show the distribution laws of three-dimensional fracture and the movement of strata,thus the reasonable scope of gas drainage can be pointed out.Meanwhile,natural gas emission measurement of the 100 meters drilling site show that a large number of overrun gas mainly transfer from the goaf area.Comparative study on rock movement and the gas concentration changes show that face gas emission is primarily affected by the periodic fracture of the high altitude roof.
引文
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[8]姜福兴,Xun Luo,杨淑华.采场覆岩空间破裂与采动应力场的微震探测研究[J].岩土工程学报,2003,25(1):23-25.Jiang Fuxing,Xun Luo,Yang Shuhua.Study on microseismic monito-ring for spatial structure of overlying strata and mining pressure fieldin longwall face[J].Chinese Jounal of Geotechnical Engineering,2003,25(1):23-25.
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[11]孔令海,姜福兴.基于高精度微震监测的特厚煤层综放工作面顶板运动规律研究[J].北京科技大学学报,2010,32(5):552-558,588.Kong Linghai,Jiang Fuxing.Roof strata movement in extra-thickcoal seam in fully mechanized sublevel caving mining based on highprecision microseismic monitoring system[J].Journal of Universityof Science and Technology Beijing,2010,32(5):552-558,588.
[12]钱鸣高,缪协兴.采场上覆岩层结构的形态与受力分析[J].岩石力学与工程学报,1995,14(2):97-106.Qian Minggao,Miao Xiexing.Theoretical analysis on the structureform and stability of overlying strata in long wall mining[J].Chi-nese Journal of Rock Mechanics and Engineering,1995,14(2):97-106.
[13]姜福兴,宋振祺,宋扬.基本顶的基本结构形式[J].岩石力学与工程学报,1993,12(4):366-379.Jiang Fuxing,Song Zhenqi,Song Yang.Basic structure forms ofmain roof[J].Chinese Journal of Rock Mechanics and Engineer-ing,1993,12(4):366-379.
[14]郭惟嘉,孔令海.岩层及地表移动与冲击地压相关性研究[J].岩土力学,2009,30(2):447-451.Guo Weijia,Kong Linghai.Correlation between rock burst andmovement of strata and ground surface[J].Rock and Soil Mechan-ics,2009,30(2):447-451.
[15]古全忠,史元伟,齐庆新.放顶煤采场顶板运动规律的研究[J].煤炭学报,1996,21(1):45-50Gu Quanzhong,Shi Yuanwei,Qi Qingxin.Rules of roof movementin sub-level caving workings[J].Journal of China Coal Society,1996,21(1):45-50.
[16]陆明心,郝海金,吴健.综放开采上位岩层的平衡结构及其对采场矿压显现的影响[J].煤炭学报,2002,27(6):591-595.Lu Mingxin,Hao Haijin,Wu Jian.The balance structure of mainroof and its action to top coal in long wall top-coal caving workface[J].Journal of China Coal Society,2002,27(6):591-595.
[2]俞启香,王凯,杨胜强.中国采煤工作面瓦斯涌出规律及其控制研究[J].中国矿业大学学报,2000,29(1):9-14.Yu Qixiang,Wang Kai,Yang Shengqiang.Study on pattern and con-trol of gas emission at coal face in China[J].Jounal of China Uni-versity of Mining&Technology,2000,29(1):9-14.
[3]许家林,钱鸣高,金宏伟.基于岩层移动的“煤与煤层气共采”技术研究[J].煤炭学报,2004,29(2):129-132.Xu Jialin,Qian Minggao,Jin Hongwei.Study on coal and coal bedmethane simultaneous extraction technique on the basis of stratamovement[J].Journal of China Coal Society,2004,29(2):129-132.
[4]俞启香,程远平,蒋承林,等.高瓦斯特厚煤层煤与卸压瓦斯共采原理及实践[J].中国矿业大学学报,2004,33(2):127-131.Yu Qixiang,Cheng Yuanping,Jiang Chenglin,et al.Principles andapplications of exploitation of coal and pressure relief gas in thickand high-gas seams[J].Jounal of China University of Mining&Technology,2004,33(2):127-131.
[5]袁亮,刘泽功.淮南矿区开采煤层顶板抽放瓦斯技术的研究[J].煤炭学报,2003,28(2):149-152.Yuan Liang,Liu Zegong.Study on the technique of roof gas drainagefrom mine coal seam in Huainan mine area[J].Journal of ChinaCoal Society,2003,28(2):149-152.
[6]滕桂荣,谭云亮,高明,等.基于LBM方法的裂隙煤体内瓦斯抽放的模拟分析[J].煤炭学报,2008,33(8):914-919.Teng Guirong,Tan Yunliang,Gao Ming,et al.Simulation of gasdrainage in fissured coal based on lattice boltzmann method[J].Journal of China Coal Society,2008,33(8):914-919.
[7]孔令海,姜福兴.基于高精度微地震监测技术的特厚煤层综放面支架围岩关系研究[J].岩土工程学报,2010,32(3):401-407.Kong Linghai,Jiang Fuxing.Relationship between support and stratabased on high precision microseismic monitoring technology in extra-thick coal seam fully-mechanized sublevel caving mining[J].Chi-nese Journal of Geotechnical Engineering,2010,32(3):401-407.
[8]姜福兴,Xun Luo,杨淑华.采场覆岩空间破裂与采动应力场的微震探测研究[J].岩土工程学报,2003,25(1):23-25.Jiang Fuxing,Xun Luo,Yang Shuhua.Study on microseismic monito-ring for spatial structure of overlying strata and mining pressure fieldin longwall face[J].Chinese Jounal of Geotechnical Engineering,2003,25(1):23-25.
[9]Luo X,Hatherly P.Understanding of high gas emissions at AppinColliery through microseismic monitoring[A].Proc.Int.MiningTech.'98 Symp[C].Chingqing,1998:74-79.
[10]孔令海,姜福兴.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,2009,37(7):871-874.Kong Linghai,Jiang Fuxing.High precision microseismic monitoringsystem to reasonable width of segment coal pillar in extra thick coalseam fully mechanized top coal caving mining[J].Journal of ChinaCoal Society,2009,37(7):871-874.
[11]孔令海,姜福兴.基于高精度微震监测的特厚煤层综放工作面顶板运动规律研究[J].北京科技大学学报,2010,32(5):552-558,588.Kong Linghai,Jiang Fuxing.Roof strata movement in extra-thickcoal seam in fully mechanized sublevel caving mining based on highprecision microseismic monitoring system[J].Journal of Universityof Science and Technology Beijing,2010,32(5):552-558,588.
[12]钱鸣高,缪协兴.采场上覆岩层结构的形态与受力分析[J].岩石力学与工程学报,1995,14(2):97-106.Qian Minggao,Miao Xiexing.Theoretical analysis on the structureform and stability of overlying strata in long wall mining[J].Chi-nese Journal of Rock Mechanics and Engineering,1995,14(2):97-106.
[13]姜福兴,宋振祺,宋扬.基本顶的基本结构形式[J].岩石力学与工程学报,1993,12(4):366-379.Jiang Fuxing,Song Zhenqi,Song Yang.Basic structure forms ofmain roof[J].Chinese Journal of Rock Mechanics and Engineer-ing,1993,12(4):366-379.
[14]郭惟嘉,孔令海.岩层及地表移动与冲击地压相关性研究[J].岩土力学,2009,30(2):447-451.Guo Weijia,Kong Linghai.Correlation between rock burst andmovement of strata and ground surface[J].Rock and Soil Mechan-ics,2009,30(2):447-451.
[15]古全忠,史元伟,齐庆新.放顶煤采场顶板运动规律的研究[J].煤炭学报,1996,21(1):45-50Gu Quanzhong,Shi Yuanwei,Qi Qingxin.Rules of roof movementin sub-level caving workings[J].Journal of China Coal Society,1996,21(1):45-50.
[16]陆明心,郝海金,吴健.综放开采上位岩层的平衡结构及其对采场矿压显现的影响[J].煤炭学报,2002,27(6):591-595.Lu Mingxin,Hao Haijin,Wu Jian.The balance structure of mainroof and its action to top coal in long wall top-coal caving workface[J].Journal of China Coal Society,2002,27(6):591-595.
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