大断面回采巷道围岩耦合支护技术
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摘要
为研究支护参数对深部大断面巷道耦合支护技术的影响,结合红庙矿大断面回采巷道支护效果不佳问题,运用FLAC~(3D)5.0数值模拟软件,建立深部大断面巷道数值模型,模拟不同支护体参数下支护结构与围岩及各支护结构间应力场变化情况。从锚杆长度,锚杆预应力,锚杆直径,锚杆排距,锚索长度等方面分析支护体与围岩的耦合情况。研究结果表明:锚杆、锚索支护参数越大,排间距越密只能增加支护体与围岩在强度和刚度方面的耦合,而各支护体间和围岩在结构上并没有很好的耦合效果。最后选取在强度、刚度、结构3个方面耦合效果俱佳的支护参数设计出新支护方案,并成功指导了工程实践。
To study the influence of supporting parameters on the coupling support technology of deep large section roadway,combined with the problem of poor supporting effect of large cross section roadways in Hongmiao Coal Mine, we used FLAC~(3D)5.0 numerical calculation and established numerical model of deep large section roadway, simulated the variation of stress field between supporting structure of surrounding rock and each supporting structure under different supporting parameters. From the aspects of bolt length, bolt pre-stress, bolt diameter, bolt row spacing and anchor cable length, we analyzed the coupling condition between the supporting structure and the surrounding rock. The results show that: the larger bolt and anchor cable support parameters, the denser row spacing can only increase the coupling between the support body and the surrounding rock in strength and stiffness, but there is no good coupling effect in structure. Finally, a new supporting scheme is designed by selecting the supporting parameters with good coupling effect in strength, stiffness and structure.
To study the influence of supporting parameters on the coupling support technology of deep large section roadway,combined with the problem of poor supporting effect of large cross section roadways in Hongmiao Coal Mine, we used FLAC~(3D)5.0 numerical calculation and established numerical model of deep large section roadway, simulated the variation of stress field between supporting structure of surrounding rock and each supporting structure under different supporting parameters. From the aspects of bolt length, bolt pre-stress, bolt diameter, bolt row spacing and anchor cable length, we analyzed the coupling condition between the supporting structure and the surrounding rock. The results show that: the larger bolt and anchor cable support parameters, the denser row spacing can only increase the coupling between the support body and the surrounding rock in strength and stiffness, but there is no good coupling effect in structure. Finally, a new supporting scheme is designed by selecting the supporting parameters with good coupling effect in strength, stiffness and structure.
引文
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[12]姚成松,于相坤,刘敏.软岩回采巷道变形机理分析研究[J].山东煤炭科技,2014(9):12-13.
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[14]赵占全.石拉乌素煤矿多层复合岩层大巷围岩稳定性控制技术研究[D].徐州:中国矿业大学,2015.
[15]乔鸿波.长沟峪矿急倾斜中厚煤层锚杆支护技术研究[D].阜新:辽宁工程技术大学,2009.
[2]何满潮,陈新,梁国平,等.深部软岩工程大变形力学分析设计系统[J].岩石力学与工程学报,2007,26(5):934-943.
[3]孙晓明,何满潮,杨晓杰.深部软岩巷道锚网索耦合支护非线性设计方法研究[J].岩土力学,2006,27(7):1061-1065.
[4]刘泉声,张华,林涛.煤矿深部岩巷围岩稳定与支护对策[J].岩石力学与工程学报,2004,23(21):3732.
[5]牛双建,靖洪文,张忠宇,等.深部软岩巷道围岩稳定控制技术研究及应用[J].煤炭学报,2011,36(6):914-919.
[6]柏建彪,王襄禹,贾明魁,等.深部软岩巷道支护原理及应用[J].岩土工程学报,2008,30(5):632-635.
[7]王进锋.高应力软岩回采巷道锚杆(索)耦合支护技术研究[D].西安:西安科技大学,2008.
[8]范加冬.深部软岩巷道耦合支护机制及参数优化研究[D].徐州:中国矿业大学,2014.
[9]张宝安.深部软岩回采巷道高应力复杂条件下锚网索复合支护研究[D].阜新:辽宁工程技术大学,2005.
[10]周扬.红庙矿高应力软岩巷道联合支护研究[D].阜新:辽宁工程技术大学,2005.
[11]张渝.红庙矿工作面采动影响下采区下山围岩稳定控制技术研究[D].阜新:辽宁工程技术大学,2013.
[12]姚成松,于相坤,刘敏.软岩回采巷道变形机理分析研究[J].山东煤炭科技,2014(9):12-13.
[13]王俊超.高应力软岩回采巷道锚网索耦合支护技术研究[D].西安:西安科技大学,2013.
[14]赵占全.石拉乌素煤矿多层复合岩层大巷围岩稳定性控制技术研究[D].徐州:中国矿业大学,2015.
[15]乔鸿波.长沟峪矿急倾斜中厚煤层锚杆支护技术研究[D].阜新:辽宁工程技术大学,2009.