地应力对裂隙岩体渗流特性影响的研究
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摘要
岩体总是赋存于一定的渗流场与应力场中的,研究地应力场对渗流场的影响具有重要的意义。首先分析了裂隙岩体渗流运动的基本规律,研究了应力对渗流作用影响的机理。在此基础上,结合甘肃某工程进行了现场地应力测量及高压压水试验,并且作了大量地表的、钻井岩芯的节理裂隙地质调查,得到了该地区的地应力值和渗透系数值。然后通过回归分析,可以发现该地区渗透系数随地应力值的增大呈负指数递减的变化规律。
Rock mass always exists in the fields of geostress and seepage,so it is important to study the effect of geostress on the permeability of rock mass.Firstly,the basic rule of seepage in fissured rock mass and the mechanism of the effect are studied.Then the in-situ geostress measurement and high water pressure test are made combining with an engineering project in Gansu Province.Investigations into joints on ground surface and in borehole are done;and the geostress and permeability coefficient of this area are obtained.By nonlinear regression analysis the change law is found that with the increase of geostress the permeability coefficient will decrease with negative exponential trend.
Rock mass always exists in the fields of geostress and seepage,so it is important to study the effect of geostress on the permeability of rock mass.Firstly,the basic rule of seepage in fissured rock mass and the mechanism of the effect are studied.Then the in-situ geostress measurement and high water pressure test are made combining with an engineering project in Gansu Province.Investigations into joints on ground surface and in borehole are done;and the geostress and permeability coefficient of this area are obtained.By nonlinear regression analysis the change law is found that with the increase of geostress the permeability coefficient will decrease with negative exponential trend.
引文
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[2]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 fluid flow within a single fracture[J].Chinese Journal of Rock Mechanics and Engineering,2002,21(1):83–87.(in Chinese))
[3]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):3 591–3 594.(Wang Guibin,Yang Chunhe.3D network simulation technique of joints in rock mass and permeability tensor analysis[J].Chinese Journal of Rock Mechanics and Engineering,2004,23(21):3 591–3 594.(in Chinese))
[4]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.(Wu Yanqing,Zhang Zhuoyuan.Introduction to Rock Hydraulics[M].Chengdu:Southwest Jiaotong University Press,1995.(in Chinese))
[5]孙广忠.岩体结构力学[M].北京:科学出版社,1988.(Sun Guangzhong.Structural Mechanics of Rock Mass[M].Beijing:Science Press,1988.(in Chinese))
[6]Louis C.A study of groundwater flow in jointed rock and its influence on stability of rock masses[R].London:Imperial College,1969.
[7]仵彦卿.裂隙岩体应力与渗流关系研究[J].水文地质工程地质,1995,6:30–35.(Wu Yanqing.The study of the relation between stress and seepage in fractured rock mass[J].Hydrogeology and Engineering Geology,1995,6:30–35.(in Chinese))
[8]刘继山.单裂隙受正应力作用时的渗流公式[J].水文地质工程地质,1987,14(2):28–32.(Liu Jishan.The seepage formula of single joint when acted with normal stress[J].Hydrogeology and Engineering Geology,1987,14(2):28–32.(in Chinese))
[9]刘继山.结构面力学参数与水力参数耦合关系及其应用[J].水文地质工程地质,1988,15(2):7–12.(Liu Jishan.The coupled relationships between mechanical and hydraulic parameters of a structural surface and their applications[J].Hydrogeology and Engineering Geology,1988,15(2):7–12.(in Chinese))
[2]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 fluid flow within a single fracture[J].Chinese Journal of Rock Mechanics and Engineering,2002,21(1):83–87.(in Chinese))
[3]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):3 591–3 594.(Wang Guibin,Yang Chunhe.3D network simulation technique of joints in rock mass and permeability tensor analysis[J].Chinese Journal of Rock Mechanics and Engineering,2004,23(21):3 591–3 594.(in Chinese))
[4]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.(Wu Yanqing,Zhang Zhuoyuan.Introduction to Rock Hydraulics[M].Chengdu:Southwest Jiaotong University Press,1995.(in Chinese))
[5]孙广忠.岩体结构力学[M].北京:科学出版社,1988.(Sun Guangzhong.Structural Mechanics of Rock Mass[M].Beijing:Science Press,1988.(in Chinese))
[6]Louis C.A study of groundwater flow in jointed rock and its influence on stability of rock masses[R].London:Imperial College,1969.
[7]仵彦卿.裂隙岩体应力与渗流关系研究[J].水文地质工程地质,1995,6:30–35.(Wu Yanqing.The study of the relation between stress and seepage in fractured rock mass[J].Hydrogeology and Engineering Geology,1995,6:30–35.(in Chinese))
[8]刘继山.单裂隙受正应力作用时的渗流公式[J].水文地质工程地质,1987,14(2):28–32.(Liu Jishan.The seepage formula of single joint when acted with normal stress[J].Hydrogeology and Engineering Geology,1987,14(2):28–32.(in Chinese))
[9]刘继山.结构面力学参数与水力参数耦合关系及其应用[J].水文地质工程地质,1988,15(2):7–12.(Liu Jishan.The coupled relationships between mechanical and hydraulic parameters of a structural surface and their applications[J].Hydrogeology and Engineering Geology,1988,15(2):7–12.(in Chinese))
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