深部断续节理岩体中渗流对巷道稳定性影响的数值分析
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摘要
应用自主开发的岩石破坏过程渗流与应力耦合分析软件F-RFPA2D,通过对高应力节理岩体中巷道的失稳破坏过程所进行的数值模拟分析,研究了深部断续节理岩体中地应力及渗流对巷道稳定性的影响。模拟结果不但直观形象地给出了巷道的渗流场、应力场、破坏区分布,而且得到了巷道周边关键部位的位移变化情况,并与无地下水的稳定性进行了比较。结果表明,岩体中断续节理与地应力及渗流相互作用,对巷道失稳的演化起了重要作用,如巷道与节理的相对方位决定了巷道坍塌的方向;岩桥对巷道的稳定起了重要的作用;虽然渗流应力加速了巷道的失稳破坏,但没有改变高地应力对巷道的主要破坏模式。该研究对于进一步理解深部岩体中节理、地应力及渗流对巷道稳定性的影响进而采取有效的加固措施具有重要的理论和实践意义。
Based on mesoscopic damage mechanics,numerical code F-RFPA2D is developed to simulate the failure process of roadway in high stress rock mass with intermittent joints.The influence of geostress and seepage on stability of deep roadway surrounding rock mass with intermittent joints is investigated.The simulation results give not only the visual image of seepage field,stress field,failure areas distribution of the roadway surrounding rock mass,but also displacement changes of key points of the roadway surrounding rock mass;moreover,stabilites of the roadway surrounding rock mass with groundwater and without groundwater is compared.The simulation results reveal that interaction among intermittent joints and geostress and seepage in rock mass plays an important role in evolution of roadway instability;for example,the direction of roadway collapse depends on the relative orientation of roadways and joints.Rock bridge plays an important role in the stability of the roadway.Although the seepage stress may accelerate instability of the roadway;the main failure modes of the roadway under high geostress is not changed by the seepage stress.The study has important theoretical and practical significance for further understanding the effect of the joints,stress and seepage on stability of deep roadway;and then to take effective reinforcement measures to deep roadway.
Based on mesoscopic damage mechanics,numerical code F-RFPA2D is developed to simulate the failure process of roadway in high stress rock mass with intermittent joints.The influence of geostress and seepage on stability of deep roadway surrounding rock mass with intermittent joints is investigated.The simulation results give not only the visual image of seepage field,stress field,failure areas distribution of the roadway surrounding rock mass,but also displacement changes of key points of the roadway surrounding rock mass;moreover,stabilites of the roadway surrounding rock mass with groundwater and without groundwater is compared.The simulation results reveal that interaction among intermittent joints and geostress and seepage in rock mass plays an important role in evolution of roadway instability;for example,the direction of roadway collapse depends on the relative orientation of roadways and joints.Rock bridge plays an important role in the stability of the roadway.Although the seepage stress may accelerate instability of the roadway;the main failure modes of the roadway under high geostress is not changed by the seepage stress.The study has important theoretical and practical significance for further understanding the effect of the joints,stress and seepage on stability of deep roadway;and then to take effective reinforcement measures to deep roadway.
引文
[1]左宇军,李夕兵,张义平.动静组合加载下岩石的破坏特性[M].北京:冶金工业出版社,2008.
[2]刘爱华,彭述权,李夕兵,等.深部开采承压突水机制相似物理模型试验系统研制及应用[J].岩石力学与工程学报,2009,28(7):1335-1441.LIU Ai-hua,PENG Shu-quan,LI Xi-bing,et al.Development and application of similar physical modelexperiment system for water inrush mechanism in deepmining[J].Chinese Journal of Rock Mechanics andEngineering,2009,28(7):1335-1341.
[3]周宏伟,谢和平,左建平.深部高地应力下岩石力学行为研究进展[J].力学进展,2005,35(1):91-99.ZHOU Hong-wei,XIE He-ping,ZUO Jian-ping.Developments in researches on mechanical behaviors ofrocks under the condition of high ground pressure in thedepths[J].Advances in Mechanics,2005,35(1):91-99.
[4]殷黎明,杨春和,王贵宾,等.地应力对裂隙岩体渗流特性影响的研究[J].岩石力学与工程学报,2005,24(17):3071-3075.YIN Li-ming,YANG Chun-he,WANG Gui-bin,et al.Study on effect of geostress on permeability of fracturedrock mass[J].Chinese Journal of Rock Mechanics andEngineering,2005,24(17):3071-3075
[5]周创兵,熊文林.地应力对裂隙岩体渗透特性的影响[J].地震学报,1997,19(2):154-163.ZHOU Chuang-bing,XIONG Wen-lin.The effect ofgeostress on the permeability character of fractured rockmass[J].Acta Seismologica Sinica,1997,19(2):154-163.
[6]LIU J,ELSWORTH D,BRADY B H.Linkingstress-dependent effective porosity and hydraulicconductivity fields to RMR[J].International Journal ofRock Mechanics and Mining Sciences,1999,36(5):581-589.
[7]蒋宇静,李博,王刚,等.岩石裂隙渗流特性试验研究的新进展[J].岩石力学与工程学报,2008,27(12):2377-2386.JIANG Yu-jing,LI Bo,WANG Gang,et al.Newadvances in experimental study on seepage characteristicsof rock fractures[J].Chinese Journal of RockMechanics and Engineering,2008,27(12):2377-2386
[8]王媛.单裂隙面渗流与应力的耦合特性[J].岩石力学与工程学报,2002,21(1):83-87.WANG Yuan.Coupling characteristic of stress and fluidflow within a single fracture[J].Chinese Journal ofRock Mechanics and Engineering,2002,21(1):83-87.
[9]王贵宾,杨春和.岩体节理三维网络模拟技术及渗透率张量分析[J].岩石力学与工程学报,2004,23(21):3591-3594.WANG Gui-bin,YANG Chun-he.3D network simulationtechnique of joints in rock mass and permeability tensoranalysis[J].Chinese Journal of Rock Mechanics andEngineering,2004,23(21):3591-3594.
[10]仵彦卿,张倬元.岩体水力学导论[M].成都:西南交通大学出版社,1995.
[11]HOEK E,BROWN E T.Underground excavations inrock[M].London:Institution of Mining and Metallurgy,1980.
[12]GRAN J K,SENSENY P E,GROETHE M A,et al.Dynamic response of an opening jointed rock[J].International Journal of Rock Mechanics and MiningSciences,1998,35(8):1021-1035.
[13]SHEN B,BARTON N.The disturbed zone around tunnelsin jointed rock masses[J].International Journal of RockMechanics and Mining Sciences,1997,34(1):117-125.
[14]张哲,王大国,洪林.深部岩体中断续节理对巷道稳定性影响的数值试验[J].辽宁工程技术大学学报,2007,26(4):481-484.ZHANG Zhe,WANG Da-guo,HONG Lin.Numericalexperiment on effect of circular roadway stability byintermittent joint in deep rock mass[J].Journal ofLiaoning Technical University,2007,26(4):481-484.
[15]孙爱花,麻红宝,朱维申.Interface模型模拟断续节理洞群渗流效应的数值分析[J].隧道建设,2007,(增刊):183-187.SUN Ai-hua,MA Hong-bao,ZHU Wei-shen.Numericalsimulation of seepage effect in intermittent joint cavernswith interface model[J].Tunnel Construction,2007,(Supp.):183-187.
[16]褚卫江,徐卫亚,苏静波,等.充水节理岩体中大断面隧洞开挖的数值模型研究[J].岩土力学,2006,27(增刊):156-160.CHU Wei-jang,XU Wei-ya,SU Jing-bo,et al.Study ofnumerical model for large tunnel during constructionprocess in water filling jointed rock mass[J].Rock andSoil Mechanics,2006,27(Supp.):156-160.
[17]TANG C A.Numerical simulation of progressive rockfailure and associated seismicity[J].InternationalJournal of Rock Mechanics and Mining Sciences,1997,34(2):249-261.
[18]TANG C A,YANG T H,THAM L G,et al.Coupledanalysis of flow,stress and damage(FSD)in rockfailure[J].International Journal of Rock Mechanicsand Mining Sciences,2002,39:477-489.
[19]杨天鸿,唐春安,朱万成,等.岩石破裂过程渗流与应力耦合分析[J].岩土工程学报,2001,23(4):489-493.YANG Tian-hong,TANG Chun-an,ZHU Wan-cheng,etal.Coupling analysis of seepage and stresses in rockfailure proces[J].Chinese Journal of GeotechnicalEngineering,2001,23(4):489-493.
[20]YANG T H,LIU J,ZHU W C,et al.Coupledflow-stress-damage model for groundwater outburstsfrom an underlying aquifer into mining excavations[J].International Journal of Rock Mechanics and MiningSciences,2007,44(1):87-97.
[2]刘爱华,彭述权,李夕兵,等.深部开采承压突水机制相似物理模型试验系统研制及应用[J].岩石力学与工程学报,2009,28(7):1335-1441.LIU Ai-hua,PENG Shu-quan,LI Xi-bing,et al.Development and application of similar physical modelexperiment system for water inrush mechanism in deepmining[J].Chinese Journal of Rock Mechanics andEngineering,2009,28(7):1335-1341.
[3]周宏伟,谢和平,左建平.深部高地应力下岩石力学行为研究进展[J].力学进展,2005,35(1):91-99.ZHOU Hong-wei,XIE He-ping,ZUO Jian-ping.Developments in researches on mechanical behaviors ofrocks under the condition of high ground pressure in thedepths[J].Advances in Mechanics,2005,35(1):91-99.
[4]殷黎明,杨春和,王贵宾,等.地应力对裂隙岩体渗流特性影响的研究[J].岩石力学与工程学报,2005,24(17):3071-3075.YIN Li-ming,YANG Chun-he,WANG Gui-bin,et al.Study on effect of geostress on permeability of fracturedrock mass[J].Chinese Journal of Rock Mechanics andEngineering,2005,24(17):3071-3075
[5]周创兵,熊文林.地应力对裂隙岩体渗透特性的影响[J].地震学报,1997,19(2):154-163.ZHOU Chuang-bing,XIONG Wen-lin.The effect ofgeostress on the permeability character of fractured rockmass[J].Acta Seismologica Sinica,1997,19(2):154-163.
[6]LIU J,ELSWORTH D,BRADY B H.Linkingstress-dependent effective porosity and hydraulicconductivity fields to RMR[J].International Journal ofRock Mechanics and Mining Sciences,1999,36(5):581-589.
[7]蒋宇静,李博,王刚,等.岩石裂隙渗流特性试验研究的新进展[J].岩石力学与工程学报,2008,27(12):2377-2386.JIANG Yu-jing,LI Bo,WANG Gang,et al.Newadvances in experimental study on seepage characteristicsof rock fractures[J].Chinese Journal of RockMechanics and Engineering,2008,27(12):2377-2386
[8]王媛.单裂隙面渗流与应力的耦合特性[J].岩石力学与工程学报,2002,21(1):83-87.WANG Yuan.Coupling characteristic of stress and fluidflow within a single fracture[J].Chinese Journal ofRock Mechanics and Engineering,2002,21(1):83-87.
[9]王贵宾,杨春和.岩体节理三维网络模拟技术及渗透率张量分析[J].岩石力学与工程学报,2004,23(21):3591-3594.WANG Gui-bin,YANG Chun-he.3D network simulationtechnique of joints in rock mass and permeability tensoranalysis[J].Chinese Journal of Rock Mechanics andEngineering,2004,23(21):3591-3594.
[10]仵彦卿,张倬元.岩体水力学导论[M].成都:西南交通大学出版社,1995.
[11]HOEK E,BROWN E T.Underground excavations inrock[M].London:Institution of Mining and Metallurgy,1980.
[12]GRAN J K,SENSENY P E,GROETHE M A,et al.Dynamic response of an opening jointed rock[J].International Journal of Rock Mechanics and MiningSciences,1998,35(8):1021-1035.
[13]SHEN B,BARTON N.The disturbed zone around tunnelsin jointed rock masses[J].International Journal of RockMechanics and Mining Sciences,1997,34(1):117-125.
[14]张哲,王大国,洪林.深部岩体中断续节理对巷道稳定性影响的数值试验[J].辽宁工程技术大学学报,2007,26(4):481-484.ZHANG Zhe,WANG Da-guo,HONG Lin.Numericalexperiment on effect of circular roadway stability byintermittent joint in deep rock mass[J].Journal ofLiaoning Technical University,2007,26(4):481-484.
[15]孙爱花,麻红宝,朱维申.Interface模型模拟断续节理洞群渗流效应的数值分析[J].隧道建设,2007,(增刊):183-187.SUN Ai-hua,MA Hong-bao,ZHU Wei-shen.Numericalsimulation of seepage effect in intermittent joint cavernswith interface model[J].Tunnel Construction,2007,(Supp.):183-187.
[16]褚卫江,徐卫亚,苏静波,等.充水节理岩体中大断面隧洞开挖的数值模型研究[J].岩土力学,2006,27(增刊):156-160.CHU Wei-jang,XU Wei-ya,SU Jing-bo,et al.Study ofnumerical model for large tunnel during constructionprocess in water filling jointed rock mass[J].Rock andSoil Mechanics,2006,27(Supp.):156-160.
[17]TANG C A.Numerical simulation of progressive rockfailure and associated seismicity[J].InternationalJournal of Rock Mechanics and Mining Sciences,1997,34(2):249-261.
[18]TANG C A,YANG T H,THAM L G,et al.Coupledanalysis of flow,stress and damage(FSD)in rockfailure[J].International Journal of Rock Mechanicsand Mining Sciences,2002,39:477-489.
[19]杨天鸿,唐春安,朱万成,等.岩石破裂过程渗流与应力耦合分析[J].岩土工程学报,2001,23(4):489-493.YANG Tian-hong,TANG Chun-an,ZHU Wan-cheng,etal.Coupling analysis of seepage and stresses in rockfailure proces[J].Chinese Journal of GeotechnicalEngineering,2001,23(4):489-493.
[20]YANG T H,LIU J,ZHU W C,et al.Coupledflow-stress-damage model for groundwater outburstsfrom an underlying aquifer into mining excavations[J].International Journal of Rock Mechanics and MiningSciences,2007,44(1):87-97.
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