岩体裂隙三轴应力渗透规律的试验研究
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摘要
利用三轴应力渗透仪分别对煤矿底板的硬岩和软岩进行三轴应力渗透试验 ,观测渗水量、围压、轴压及水压的变化。实验证明有效应力越大 ,渗透系数越小 ,软岩裂隙的渗透系数小于硬岩裂隙的渗透系数且受应力的影响较大 ,并结合试验结果分析了硬岩和软岩的阻水能力及岩体裂隙突水的机理
The permeability experiment of hard rock and soft rock are done under triaxial compressive stress. The permeability, confining pressure, axial pressure, and water pressure are observed. These experiments indicate the permeability coefficient is inversely proportional to increasing effective stress .The permeability coefficient of soft rock is lower than that of hard rock and is more significantly affected by effective stress. The water-resisting capability of the two rocks and the mechanism for water inrush through the cracks in rock mass are analyzed according to the experiments.
The permeability experiment of hard rock and soft rock are done under triaxial compressive stress. The permeability, confining pressure, axial pressure, and water pressure are observed. These experiments indicate the permeability coefficient is inversely proportional to increasing effective stress .The permeability coefficient of soft rock is lower than that of hard rock and is more significantly affected by effective stress. The water-resisting capability of the two rocks and the mechanism for water inrush through the cracks in rock mass are analyzed according to the experiments.
引文
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[6] 许兵.关于岩体结构力学基本观点探讨[J].工程地质学报,1997,5(4):295～298.Xubing.Adiscussiononthebasicviewpointsofrockmassstruc turalmechanics.Journalofengineeringgeology,1997,5(4):295～298.
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