淋涌水型煤泥岩顶板巷道破坏机制与控制技术
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摘要
针对华亿五一煤业淋涌水型煤泥岩顶板巷道变形破坏问题,以该煤矿11101工作面运输巷为例,采用现场观测与室内试验方法,对巷道破坏特征及机制展开了研究。结果表明:11101工作面运输巷煤泥岩顶板下沉变形显著,最大下沉量达700mm,锚杆索和工字钢支架损坏现象严重;顶板泥岩含有大量高岭石和蒙脱石成分,遇水易发生泥化、软化和膨胀变形;巷道破坏失稳是围岩强度低、泥岩遇水易泥化、未采取防水措施、支护方式不合理等因素综合作用的结果。提出了顶板全锚索支护+防水型锚固剂+泄水孔排水的淋涌水型煤泥岩顶板巷道破坏控制措施,并应用于11101工作面回风巷。实践表明,回风巷掘出约30d后,巷道变形趋于平稳,顶板最大下沉量约为112mm,巷道断面满足生产需求。
For deformation and failure problem of water spraying and gushing type roadway with coalmudstone roof in Huayi Wuyi Coal Mine,taking haulage rodeway of 11101 working face in the coal mine as an example,roadway failure characteristics and mechanism was researched by use of field observation and indoor test.The results show that coal-mudstone roof of the haulage rodeway has evident deformation with the maximum subsidence of 700 mm,and bolts,anchors and I-steel supports are damaged seriously.Roof mudstone contains large amounts of kaolinite and montmorillonite,which cause argillization,softening and swelling deformation of the mudstone in contact with water.Failure and instability of the haulage gateway are a result of the combined action of low-strength of surrounding rock,argillization of mudstone in contact with water,lack of waterproof measures and unreasonable support modes.Failure control measures of water spraying and gushing type roadway with coal-mudstone roof were proposed including whole anchors support of roof,waterproof type anchoring agent and drainage through outlet entrances.The control measures have been applied in return airway of 11101 working face.The practice shows that deformation tends to stabilize after tunneling of the return airway is finished 30 days,the maximum subsidence of roof is about 112 mm,and section of the return airway satisfies production requirements.
For deformation and failure problem of water spraying and gushing type roadway with coalmudstone roof in Huayi Wuyi Coal Mine,taking haulage rodeway of 11101 working face in the coal mine as an example,roadway failure characteristics and mechanism was researched by use of field observation and indoor test.The results show that coal-mudstone roof of the haulage rodeway has evident deformation with the maximum subsidence of 700 mm,and bolts,anchors and I-steel supports are damaged seriously.Roof mudstone contains large amounts of kaolinite and montmorillonite,which cause argillization,softening and swelling deformation of the mudstone in contact with water.Failure and instability of the haulage gateway are a result of the combined action of low-strength of surrounding rock,argillization of mudstone in contact with water,lack of waterproof measures and unreasonable support modes.Failure control measures of water spraying and gushing type roadway with coal-mudstone roof were proposed including whole anchors support of roof,waterproof type anchoring agent and drainage through outlet entrances.The control measures have been applied in return airway of 11101 working face.The practice shows that deformation tends to stabilize after tunneling of the return airway is finished 30 days,the maximum subsidence of roof is about 112 mm,and section of the return airway satisfies production requirements.
引文
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[14]王德超,李术才,王琦,等.深部厚煤层综放沿空掘巷煤柱合理宽度试验研究[J].岩石力学与工程学报,2014,33(3):539-548.WANG Dechao,LI Shucai,WANG Qi,et al.Experimental study of reasonable coal pillar width in fully mechanized top coal caving face of deep thick coal seam[J].Chinese Journal of Rock Mechanics and Engineering,2014,33(3):539-548.
[15]ZHANG Guangchao,LIANG Saijiang,TANYunliang,et al.Numerical modeling for longwall pillar design:a case study from a typical longwall panel in China[J].Journal of Geophysics and Engineering,2018,15(1):121-134.
[2]何富连,张广超.大断面采动剧烈影响煤巷变形破坏机制与控制技术[J].采矿与安全工程学报,2016,33(3):423-430.HE Fulian,ZHANG Guangchao.Deformation and failure mechanism and control technology of large section coal roadway subjected to severe mining dynamic load[J].Journal of Mining&Safety Engineering,2016,33(3):423-430.
[3]李学华,梁顺,姚强岭,等.泥岩顶板巷道围岩裂隙演化规律与冒顶机理分析[J].煤炭学报,2011,36(6):903-908.LI Xuehua,LIANG Shun,YAO Qiangling,et al.Analysis on fissure-evolving law and roof-falling mechanism in roadway with mudstone roof[J].Journal of China Coal Society,2011,36(6):903-908.
[4]严红,何富连,段其涛.淋涌水碎裂煤岩顶板煤巷破坏特征及控制对策研究[J].岩石力学与工程学报,2012,31(3):524-533.YAN Hong,HE Fulian,DUAN Qitao.Failure characteristic of coal roadway with water spraying and gushing in fragmentation roof and its control countermeasures[J].Chinese Journal of Rock Mechanics and Engineering,2012,31(3):524-533.
[5]姚强岭,李学华,瞿群迪,等.泥岩顶板巷道遇水冒顶机理与支护对策分析[J].采矿与安全工程学报,2011,28(1):28-33.YAO Qiangling,LI Xuehua,QU Qundi,et al.Supporting countermeasures and roof falling mechanism reacting with water in mudstone roof roadway[J].Journal of Mining&Safety Engineering,2011,28(1):28-33.
[6]卞跃威,夏才初,肖维民,等.考虑围岩软化特性和应力释放的圆形隧道黏弹塑性解[J].岩土力学,2013,34(1):211-220.BIAN Yuewei,XIA Caichu,XIAO Weimin,et al.Visco-elastoplastic solutions for circular tunnel considering stress release and softening behaviour of rocks[J].Rock and Soil Mechanics,2013,34(1):211-220.
[7]严红,何富连,徐腾飞.深井大断面煤巷双锚索桁架控制系统的研究与实践[J].岩石力学与工程学报,2012,31(11):2248-2257.YAN Hong,HE Fulian,XU Tengfei.Study of doublecable-truss controlling system for large section coal roadway of deep mine and its practice[J].Chinese Journal of Rock Mechanics and Engineering,2012,31(11):2248-2257.
[8]康荣,何富连,李宏彬.桁架锚索在碎裂顶板巷道支护中的应用[J].煤炭科学技术,2010,38(5):28-30.KANG Rong,HE Fulian,LI Hongbin.Application of truss and anchor to support seam gateway with broken roof[J].Coal Science and Technology,2010,38(5):28-30.
[9]康红普,王金华,林健.煤矿巷道锚杆支护应用实例分析[J].岩石力学与工程学报,2010,29(4):649-664.KANG Hongpu,WANG Jinhua,LIN Jian.Case studies of rock bolting in coal mine roadways[J].Chinese Journal of Rock Mechanics and Engineering,2010,29(4):649-664.
[10]严红,何富连,王思贵.特大断面巷道软弱厚煤层顶板控制对策及安全评价[J].岩石力学与工程学报,2014,33(5):1014-1023.YAN Hong,HE Fulian,WANG Sigui.Safety control and evaluation of roadway with super-large crosssection and soft-weak thick coal roof[J].Chinese Journal of Rock Mechanics and Engineering,2014,33(5):1014-1023.
[11]苏学贵,宋选民,李浩春,等.特厚松软复合顶板巷道拱-梁耦合支护结构的构建及应用研究[J].岩石力学与工程学报,2014,33(9):1828-1836.SU Xuegui,SONG Xuanmin,LI Haochun,et al.Study on coupled arch-beam support structure of roadway with extra-thick soft compound roof[J].Chinese Journal of Rock Mechanics and Engineering,2014,33(9):1828-1836.
[12]张广超,何富连.大断面综放沿空巷道煤柱合理宽度与围岩控制[J].岩土力学,2016,37(6):1721-1728.ZHANG Guangchao,HE Fulian.Pillar width determination and surrounding rocks control of gobside entry with large cross-section and fullymechanized mining[J].Rock and Soil Mechanics,2016,37(6):1721-1728.
[13]张广超,何富连,来永辉,等.高强度开采综放工作面区段煤柱合理宽度与控制技术[J].煤炭学报,2016,41(9):2188-2194.ZHANG Guangchao,HE Fulian,LAI Yonghui,et al.Reasonable width and control technique of segment coal pillar with high-intensity fully-mechanized caving mining[J].Journal of China Coal Society,2016,41(9):2188-2194.
[14]王德超,李术才,王琦,等.深部厚煤层综放沿空掘巷煤柱合理宽度试验研究[J].岩石力学与工程学报,2014,33(3):539-548.WANG Dechao,LI Shucai,WANG Qi,et al.Experimental study of reasonable coal pillar width in fully mechanized top coal caving face of deep thick coal seam[J].Chinese Journal of Rock Mechanics and Engineering,2014,33(3):539-548.
[15]ZHANG Guangchao,LIANG Saijiang,TANYunliang,et al.Numerical modeling for longwall pillar design:a case study from a typical longwall panel in China[J].Journal of Geophysics and Engineering,2018,15(1):121-134.