层状裂隙岩体有自由面的渗流分析
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摘要
针对互层状裂隙岩体中的渗流问题,总结了互层状裂隙岩体中的层面裂隙和构造裂隙发育规律,提出了一种互层状岩体中裂隙网络生成方法并基于双重介质饱和—非饱和渗流模型分析了软岩中存在和不存在切层裂隙两种情况下自由面渗流问题,讨论了层面裂隙、层间裂隙和切层裂隙隙宽对自由面的影响。结果表明,在互层状裂隙岩体有自由面渗流中可能出现多层自由面的现象,取决于层间、切层及层面裂隙隙宽的组合。
For the seepage problems in inter-bed layered fractured rock masses,the development rules of bed fractures and tectonic fractures in inter-bed layered rock masses are studied,and a fracture network generation method is put forward,and then the seepage problems with free surface is analyzed with double medium model with considering the unbounded fracture or not,at last the free surface variation caused by the varying aperture of bed fracture,bounded fracture and unbounded fracture are discussed.The analysis shows that there are probably more than one free surface existing in the seepage problem with free surface in inter-bed layered fractured rock masses,and which depends on the aperture of bed fracture,bounded fracture and unbounded fracture.
For the seepage problems in inter-bed layered fractured rock masses,the development rules of bed fractures and tectonic fractures in inter-bed layered rock masses are studied,and a fracture network generation method is put forward,and then the seepage problems with free surface is analyzed with double medium model with considering the unbounded fracture or not,at last the free surface variation caused by the varying aperture of bed fracture,bounded fracture and unbounded fracture are discussed.The analysis shows that there are probably more than one free surface existing in the seepage problem with free surface in inter-bed layered fractured rock masses,and which depends on the aperture of bed fracture,bounded fracture and unbounded fracture.
引文
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[2]曹建生,张万军,刘昌明,等.裂隙岩体渗流补给特性及边坡稳定对策研究[J].北京林业大学学报,2007,29(4):136-142
[3]张有天.岩石水力学与工程[M].北京:中国水利水电出版社,2005.
[4]张勤,陈志坚,朱代洪,等.层状裂隙岩体稳定分析中的主要问题[J].岩土工程学报,2001,23(6):753-756
[5]陈志坚,卓家寿.样本单元法及层状含裂隙岩体力学参数的确定[J].河海大学学报(自然科学版),2000,28(1):14-17
[6]孙广忠.地质工程理论与实践[M].北京:地震出版社,1996.
[7]吴占寿.岩体断裂的等间距规律初探[J].南昌水专学报,1995,14(1):33-38,53
[8]Doolin D M,Mauldon M.Fracture Permeability Nor-mal to Bedding in Layered Rock Masses[J].Interna-tional Journal of Rock Mechanics&Mining Sci-ences,2001,38(2):199-210
[9]Gervais F,Chiles J P,Gentier S.Geostatistical Analysisand Hierarchical Modelling of a Fracture Network in aStratified Rockmass[M].Rotterdam:Balkema,1992.
[10]卢刚,周志芳.裂隙网络渗流理论的软硬互层状岩体渗流分析[J].水电能源科学,2006,24(4):41-43
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