岩石面糙率的分布及其对裂隙水流的影响

Numerical Description of Rock Surface Roughness and Its Influence on Fracture Water Flow

就岩石面糙率的分布规律及其对裂隙水流的影响进行了计算分析．通过天然大理石板人工构成裂隙模型所进行的大应力高水头耦合试验研究，对大理石板面糙率的实测数据进行了数值分析．分析表明，该岩面糙率符合高斯分布．由此得出了数值岩面．同时，用数学模型确定了裂隙面接触状态与应力的关系，用应力场与渗流场耦合分析法描述了裂隙渗流随应力变化的渗流特性，从计算途径验证了试验结果．

This paper presents numerical calculation of the distribution of rock surface roughness and its influence on fracture water flow.Numerical analysis is carried out for the roughness of marble surface measured in high water head and high stress coupled experiments on the man made fracture model of natural marble plate.The conclusion is that the roughness of rock surface follows Gaussian distribution and a numerical surface can be generated according to this distribution.Thus,the relationship between stress and the contact of fracture surface can be determined by mathematical model.The seepage characteristic that fracture seepage varies with stress can be determined by coupled analysis of stress field and seepage field.The analysis mentioned above further verifies the vosults of the test.