千米深井中央泵房围岩控制技术研究
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摘要
为了研究锚注支护在千米深井软岩巷道围岩控制中的应用效果,以安居煤矿中央泵房为研究对象,利用FLAC3D,通过建立锚-网-索-喷支护之后注浆与非注浆加固两种条件下的数值模型,对安居煤矿泵房硐室的锚注支护加固效果进行数值对比分析。现场监测表明:泵房围岩的最大变形量为52.4mm,锚杆的最大受力为186.5kN,围岩最大应力均维持在5 MPa左右,没有出现应力集中现象。锚网索喷让压+锚注联合支护技术有效地控制了泵房硐室围岩的稳定。
In order to study the application effect of bolting-grouting support for surrounding rock control of soft rock roadway in deep mine,the central pump room of Anju coal mine was taken as the research object.Based on FLAC3D,the numerical models under two kinds of support ways,including bolt-mesh-anchor-shotcrete support without grouting and bolt-mesh-anchorshotcrete-grouting support,were established.And the reinforcement effects of two supports for pump room were numerically compared and analyzed.The field monitoring showed that the maximum deformation of surrounding rock in pump room was52.4mm,the maximum stress of rock bolt was 186.5kN,and the maximum stress of surrounding rock was about 5 MPa,without stress concentration phenomenon.The support scheme combining bolt-mesh-anchor-shotcrete support and boltinggrouting support could effectively control the stability of surrounding rock in pump room.
In order to study the application effect of bolting-grouting support for surrounding rock control of soft rock roadway in deep mine,the central pump room of Anju coal mine was taken as the research object.Based on FLAC3D,the numerical models under two kinds of support ways,including bolt-mesh-anchor-shotcrete support without grouting and bolt-mesh-anchorshotcrete-grouting support,were established.And the reinforcement effects of two supports for pump room were numerically compared and analyzed.The field monitoring showed that the maximum deformation of surrounding rock in pump room was52.4mm,the maximum stress of rock bolt was 186.5kN,and the maximum stress of surrounding rock was about 5 MPa,without stress concentration phenomenon.The support scheme combining bolt-mesh-anchor-shotcrete support and boltinggrouting support could effectively control the stability of surrounding rock in pump room.
引文
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[9]王襄禹,柏建彪,陈勇,等.软岩巷道锚注结构承载特性的时变规律与初步应用[J].岩土工程学报,2013(03):170-172.
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[2]李云,何宇雄,叶川,等.深部软岩巷道锚注支护技术研究现状与展望[J].煤矿安全,2015(04):193-194.
[3]曹栩.孔庄矿深井水泵房硐室围岩结构稳定性分析及控制技术[D].徐州:中国矿业大学,2014.
[4]范广建.千米深井中央水泵房围岩控制技术[J].煤炭工程,2012(07):34-36.
[5]孟庆斌,乔卫国,林登阁,等.深部高应力膨胀性软岩泵房支护技术[J].金属矿山,2010(08):11-12.
[6]王连国,李明远,王学知.深部高应力极软岩巷道锚注支护技术研究[J].岩石力学与工程学报,2005,24(16):2890-2892.
[7]王连福.软岩巷道锚注支护机理分析及工程应用[D].淮南:安徽理工大学,2005.
[8]刘福胜.基于非线性分析的锚注支护机理研究[D].泰安:山东科技大学,2006.
[9]王襄禹,柏建彪,陈勇,等.软岩巷道锚注结构承载特性的时变规律与初步应用[J].岩土工程学报,2013(03):170-172.
[10]陆银龙,王连国,张蓓,等.软岩巷道锚注支护时机优化研究[J].岩土力学,2012,33(5):1396-1397.