中文摘要：

以金川水电站泄洪洞进水口边坡纵剖面为计算剖面，基于极限平衡理论和方法，首先计算天然工况、暴雨工况和地震工况下剖面的稳定性，并确定最危险工况为暴雨工况，然后以最危险工况下规范规定的最低安全系数为反演目标，对变形体岩体强度参数进行反演分析，最后结合工程实际确定合理的变形体岩体强度参数。计算结果表明：在安全系数一定的情况下，岩体内摩擦角与黏聚力之间呈反比关系；确定变形体浅层强度参数c=150.00 kPa、φ=24.0°，深层强度参数c=309.00 kPa、φ=34.9°，在该参数情况下，边坡天然工况下处于稳定状态。

英文摘要：

Taking the longitudinal section of the intake slope of flood discharging tunnel of Jinchuan Hydropower Station as a calculation section and based on the limit equilibrium theory and method, the most dangerous working conditions were determined, Then the specifications stipulated mini- mum safety factor in the most dangerous conditions was taken for the inversion of the target to back analysis strength parameters of the deformation. Finally, combined with engineering practice, reasonable strength mechanical parameters were determined and verified . The results show that in the case of certain safety coefficient, it is inverse relationship between the angle of internal friction and cohesion of rock mass ; the strength parameters for the shallow part of the deformation body are c=150.00 kPa、φ=24.0°, and the deep part are c = 309.00 kPa, φ=34.9°, under this parame- ters, the slope is stable in natural conditions