特厚煤层综放采场支架合理工作阻力研究
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摘要
采用微震监测技术、相似材料模拟试验和现场支架工作阻力宏观观测等方法,对15 m以上特厚煤层综放采场支架合理工作阻力进行研究。支架阻力宏观观测表明,正常情况和老顶来压情况下,支架安全阀开启都较为频繁,说明13 000 kN/架的支架额定工作阻力不能满足目前工作面开采的需要,支架工作阻力在正常情况下为9 000～12 000 kN/架,老顶来压时大于13 000 kN/架。通过相似模拟试验研究,得到特厚煤层综放采场支架工作阻力为:正常情况下,支架合理工作阻力为9 000～13 000 kN/架;低位老顶来压情况下,为13 000～17 500 kN/架;高位老顶动压情况下,为17 500～23 000 kN/架。微震监测结果表明,支架工作阻力在正常情况下平均为10 971.45 kN/架,异常来压时大于13 333.95 kN/架。将相似材料模拟试验、现场宏观观测和微地震监测研究结果进行定性对比研究,可得支架工作状态分为三类:正常情况、低位老顶来压和高位老顶来压。
By using microseismic monitoring technology,similar material simulation test and macro observation of support resistance in project site,the reasonable working resistance of hydraulic support is studied.Macro observation of support resistances shows that the support resistances under normal circumstance and abnormal circumstance(the main roof strata pressure) are 9 000–12 000 kN/frame and 13 000 kN/frame respectively.Similar material simulation test shows that the resaonable working resistances of support are 9 000–12 000 kN/frame under normal circumstance and in the case of the lower main roof pressure and the higher main roof pressure those are 13 000–15 000 kN/frame and 17 500–23 000 kN/frame respectively.Microseismic monitoring results show that the support resistance under normal circumstance is 10 971.45 kN/frame on average,and that under abnormal pressure is greater than 13 333.95 kN/frame.Hydraulic support working resistance is obtained through the similar material simulation test.Comparative study among similar material simulation experimentf,ield macro observation and microseismic monitoring shows that the working state of support can be divided into three categories,i.e.normal state,low roof strata pressure and high roof strata pressure.
By using microseismic monitoring technology,similar material simulation test and macro observation of support resistance in project site,the reasonable working resistance of hydraulic support is studied.Macro observation of support resistances shows that the support resistances under normal circumstance and abnormal circumstance(the main roof strata pressure) are 9 000–12 000 kN/frame and 13 000 kN/frame respectively.Similar material simulation test shows that the resaonable working resistances of support are 9 000–12 000 kN/frame under normal circumstance and in the case of the lower main roof pressure and the higher main roof pressure those are 13 000–15 000 kN/frame and 17 500–23 000 kN/frame respectively.Microseismic monitoring results show that the support resistance under normal circumstance is 10 971.45 kN/frame on average,and that under abnormal pressure is greater than 13 333.95 kN/frame.Hydraulic support working resistance is obtained through the similar material simulation test.Comparative study among similar material simulation experimentf,ield macro observation and microseismic monitoring shows that the working state of support can be divided into three categories,i.e.normal state,low roof strata pressure and high roof strata pressure.
引文
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[10]缪协兴,钱鸣高.综放采场围岩–支架整体力学模型及分析[J].煤,1998,7(6):1–13.(MIAO Xiexing,QIAN Minggao.The integer mechanical model of support and strata in fully-mechanized sublevel caving face[J].Chinese Journal of Coal,1998,7(6):1–13.(in Chinese))
[11]史元伟.综放工作面围岩动态及液压支架载荷力学模型[J].煤炭学报,1997,22(3):253–258.(SHI Yuanwei.Behaviour of rocks and mechanical model of loads on the powered supports in a fully mechanized sublevel caving face[J].Journal of China Coal Society,1997,22(3):253–258.(in Chinese))
[12]毛德兵,康立军.综放开采支架工作阻力不唯一性原因分析[J].煤炭科学技术,2003,31(11):29–31.(MAO Debing,KANG Lijun.Reasons analysis of different working resistances of top coal caving power supports in the same seam[J].Coal Science and Technology,2003,31(11):29–31.(in Chinese))
[13]郝宪杰,许家林.综采支架工作阻力确定方法综述[J].神华科技,2009,7(4):12–16.(HAO Xianjie,XU Jialin.Summary on determination of the reasonable working resistance of hydraulic support in fully-mechanized face[J].Chinese Journal of Shenhua Technology,2009,7(4):12–16.(in Chinese))
[14]姜福兴.放顶煤采场的顶板结构及其支架围岩关系探讨[J].世界煤炭技术,1994,(12):32–34.(JIANG Fuxing.A study on microseismic monitoring of rock burst in coal mine[J].Chinese Journal of World Coal Technology,1994,(12):32–34.(in Chinese))
[15]杨淑华,姜福兴.综采放顶煤支架受力与顶板结构的关系探讨[J].岩石力学与工程学报,1999,18(3):287–290.(YANG Shuhua,JIANG Fuxing.Research on the relationship between sublevel caving support load and roof structure[J].Chinese Journal of Rock Mechanics and Engineering,1999,18(3):287–290.(in Chinese))
[2]姜福兴,宋广东,孔令海,等.微地震波在煤矿岩层中的传播特征研究[J].岩石力学与工程学报,2009,28(增1):2 674–2 679.(JIANG Fuxing,SONG Guangdong,KONG Linghai,et al.Research on spread characteristics of micro-seismic wave in mine strata[J].Chinese Journal of Rock Mechanics and Engineering,2009,28(Supp.1):2 674–2 679.(in Chinese))
[3]来兴平,王宁波,胥海东,等.复杂环境下急倾斜特厚煤层安全开采[J].北京科技大学学报,2009,31(3):277–280.(LAI Xingping,WANG Ningbo,XU Haidong,et al.Safety top-coal-caving of heavy and steep coal seams under complex environment[J].Journal of University of Science and Technology Beijing,2009,31(3):277–280.(in Chinese))
[4]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,2008,25(1):23–25.(KONG Linghai,JIANG Fuxing,LIU Jie,et al.High precision microseismic monitoring system to reasonable width of segment coal pillar in extra thick coal seam fully mechanized top coal caving mining[J].Journal of China Coal Society,2008,25(1):23–25.(in Chinese))
[5]孔令海,姜福兴,王存文,等.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,WANG Cunwen,et al.Relationship between support and strata based on high precision microseismic monitoring technology in extra-thick coal seam fully-mechanized sublevel caving mining[J].Chinese Journal of Geotechnical Engineering,2010,32(3):401–407.(in Chinese))
[6]孔令海,姜福兴,杨淑华,等.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):552–588.(KONG Linghai,JIANG Fuxing,YANG Shuhua,et al.Roof strata movement in extra-thick coal seam in fully mechanized sublevel caving mining based on high precision microseismic monitoring system[J].Journal of University of Science and Technology Beijing,2010,32(5):552–588.(in Chinese))
[7]姜福兴.放顶煤采场的顶板结构及其支架围岩关系探讨[J].世界煤炭技术,1994,(12):32–34.(JIANG Fuxing.A study on microseismic monitoring of rock burst in coal mine[J].Chinese Journal of World Coal Technology,1994,(12):32–34.(in Chinese))
[8]史红,姜福兴.综放采场初压阶段顶板稳定性与顶煤放出率关系探讨[J].岩土工程学报,2005,27(4):414–417.(SHI Hong,JIANG Fuxing.Study on relationship between roof stability and recovery ratio of top coal at first weight period in fully-mechanized sublevel caving face[J].Chinese Journal of Geotechnical Engineering,2005,27(4):414–417.(in Chinese))
[9]史红,姜福兴,汪华君.综放采场周期来压阶段顶板稳定性与顶煤放出率关系探讨[J].岩石力学与工程学报,2005,24(23):4 233–4 238.(SHI Hong,JIANG Fuxing,WANG Huajun.Study on relationship between roof stability ratio during cyclic weighting in fully-mechanized sublevel caving face[J].Chinese Journal of Rock Mechanics and Engineering,2005,24(23):4 233–4 238.(in Chinese))
[10]缪协兴,钱鸣高.综放采场围岩–支架整体力学模型及分析[J].煤,1998,7(6):1–13.(MIAO Xiexing,QIAN Minggao.The integer mechanical model of support and strata in fully-mechanized sublevel caving face[J].Chinese Journal of Coal,1998,7(6):1–13.(in Chinese))
[11]史元伟.综放工作面围岩动态及液压支架载荷力学模型[J].煤炭学报,1997,22(3):253–258.(SHI Yuanwei.Behaviour of rocks and mechanical model of loads on the powered supports in a fully mechanized sublevel caving face[J].Journal of China Coal Society,1997,22(3):253–258.(in Chinese))
[12]毛德兵,康立军.综放开采支架工作阻力不唯一性原因分析[J].煤炭科学技术,2003,31(11):29–31.(MAO Debing,KANG Lijun.Reasons analysis of different working resistances of top coal caving power supports in the same seam[J].Coal Science and Technology,2003,31(11):29–31.(in Chinese))
[13]郝宪杰,许家林.综采支架工作阻力确定方法综述[J].神华科技,2009,7(4):12–16.(HAO Xianjie,XU Jialin.Summary on determination of the reasonable working resistance of hydraulic support in fully-mechanized face[J].Chinese Journal of Shenhua Technology,2009,7(4):12–16.(in Chinese))
[14]姜福兴.放顶煤采场的顶板结构及其支架围岩关系探讨[J].世界煤炭技术,1994,(12):32–34.(JIANG Fuxing.A study on microseismic monitoring of rock burst in coal mine[J].Chinese Journal of World Coal Technology,1994,(12):32–34.(in Chinese))
[15]杨淑华,姜福兴.综采放顶煤支架受力与顶板结构的关系探讨[J].岩石力学与工程学报,1999,18(3):287–290.(YANG Shuhua,JIANG Fuxing.Research on the relationship between sublevel caving support load and roof structure[J].Chinese Journal of Rock Mechanics and Engineering,1999,18(3):287–290.(in Chinese))
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