露天煤矿边坡稳态影响因子敏感性分析及滑坡控制对策

Sensitivity Analysis on Static Influence Factor of Open Mine Slope and Landslide Control Measures

通过现场地质调查,对胜利露天煤矿的滑坡形成原因和主要影响因素进行了分析,确定了滑坡主要导致因素为水的作用、岩性、开挖破坏、地震动等。考虑滑坡体岩性、荷载、加固力等具体情况,采用MSARMA法对边坡排水率Dr、岩体容重RR、底滑面的CB与φB值、侧滑面的Cs与φs值以及地震动影响系数Kc等边坡稳定性的影响参数敏感性进行了分析。得出排水率和地震动是影响边坡稳定的主要诱发因素,而边坡滑体的抗剪强度和岩体容重是影响边坡稳定的环境因素的结论。依据滑坡的影响因素和边坡稳态影响因子敏感性分析,制订了胜利露天煤矿边坡"疏排降水、锚索加固、削坡卸载和远程监测"滑坡控制对策。

With the site geological investigation,an analysis was conducted on the landslide formation cause and the main influence factors in Shengli Open Mine.The main factors to occur the landslide were determined including the water action,lithology,excavated failure,seismic dynamic and others.In consideration of the landslide lithology,load,reinforced force and other certain conditions,the MSARMA method was applied to analyze the slope water drainage rate DR,rock volume-weight RR,the CB and φB value of the floor slide surface,the Cs and φs value of the side slide surface,the seismic dynamic influence coefficient Kc and the influence parameter sensitivity of the slope stability.The results showed that the water drainage rate and the seismic dynamic would be the key induction factors influenced to the slope stability and the shearing strength and the rock volume-weight of the slope landslide would be the environment factor influenced to the slope stability as a conclusion.According to the sensitivity analysis on the landslide influence factor and the slope stability influence factor,a landslide control measures of ＂water drainage and dropping,anchor reinforcement,slope excavation and pressure releasing and the remote monitoring and measuring＂ for Shengli Open Mine were established.