关键词: 软硬岩互层, 防治工程, 反分析, 抗剪强度参数, 边坡稳定性

Abstract: The soft and hard rock interbedded antidip rock slope has the characteristics of complex formation mechanism,strong concealment of internal joint structure and many disaster causing factors,so its prevention and control engineering is relatively difficult.The risk of geological disaster in Fushun West Openpit Mine is high.There are many buildings and dense population around the mining boundary,especially in the northeast of mining boundary.It is necessary to take strong and comprehensive measures.Based on the historical disaster statistics of Fushun landslide and the refined engineering geological exploration of the study area,the mechanism of E1000 slope instability in the mining area is analyzed from multiple angles.The back analysis method of strength reduction theory to check the limit equilibrium of rigid body is used to carry out the back analysis of the existing landslide morphology.Based on the shear strength parameters of shale interbedding obtained by back analysis,the design of drainage,slope cutting and water filling is done,and the slope stability of backfill and comprehensive treatment scheme is calculated.The results show that the comprehensive treatment scheme has the characteristics of low investment intensity,high safety (safety coefficient is 1.506) and suitable treatment measures.