基于青海牛苦头露天金属矿边坡工程,首先根据地质因素和工程因素,把边坡分成5个地质区域。然后对地勘资料和室内试验数据进行统计分类,利用CSMR(Chinese Slope Mass Rating)法对边坡进行分级评价。选取代表性剖面进行二维数值计算分析,...基于青海牛苦头露天金属矿边坡工程,首先根据地质因素和工程因素,把边坡分成5个地质区域。然后对地勘资料和室内试验数据进行统计分类,利用CSMR(Chinese Slope Mass Rating)法对边坡进行分级评价。选取代表性剖面进行二维数值计算分析,运用GEO-SLOPE软件对边坡稳定性进行初算,再采用MSARMA法综合考虑边坡的排水能力与地震荷载情况对边坡进行极限平衡分析。最后依据分析计算结果和实际工况优选合适的边坡角。展开更多
Unreasonable design of the slope angle of the open pit mine is one of the main causes of slope instability,and this issue is particularly prominent under rainfall infiltration conditions.Therefore,designing a scientif...Unreasonable design of the slope angle of the open pit mine is one of the main causes of slope instability,and this issue is particularly prominent under rainfall infiltration conditions.Therefore,designing a scientific,economical,and reasonable slope angle based on the failure mechanism of open pit mine slopes is of great significance for the mining safety and long-term stability of open pit mine slopes.This paper aims to propose an MSARMA slope angle optimization method with simple calculation and wide applicability and verify its rationality by utilizing the characteristics of constant-resistance large-deformation(CRLD)anchor cables that can monitor slope stability.Relevant research was carried out by taking four hazardous profiles of the Antaibao Open-pit Coal Mine in China as examples.The results show that slope instability under rainfall infiltration conditions can be divided into four stages through numerical simulation analysis combined with the actual on-site failure process:surface scouring,surface settlement,crack propagation,and shear slip.The slope angles were optimized for the four hazardous profiles with historical landslide occurrences,and the optimization results were verified using field monitoring data.When the slope angles of A-A′,B-B′,C-C′and D-D′dangerous sections are 34°,32°,33°and 33°respectively,the safety,stability,and economic rationality of the slope can be guaranteed.This study provides a theoretical basis and practical reference for slope angle optimization under similar engineering geological conditions.展开更多
摘要基于青海牛苦头露天金属矿边坡工程,首先根据地质因素和工程因素,把边坡分成5个地质区域。然后对地勘资料和室内试验数据进行统计分类,利用CSMR(Chinese Slope Mass Rating)法对边坡进行分级评价。选取代表性剖面进行二维数值计算分析,运用GEO-SLOPE软件对边坡稳定性进行初算,再采用MSARMA法综合考虑边坡的排水能力与地震荷载情况对边坡进行极限平衡分析。最后依据分析计算结果和实际工况优选合适的边坡角。
摘要Unreasonable design of the slope angle of the open pit mine is one of the main causes of slope instability,and this issue is particularly prominent under rainfall infiltration conditions.Therefore,designing a scientific,economical,and reasonable slope angle based on the failure mechanism of open pit mine slopes is of great significance for the mining safety and long-term stability of open pit mine slopes.This paper aims to propose an MSARMA slope angle optimization method with simple calculation and wide applicability and verify its rationality by utilizing the characteristics of constant-resistance large-deformation(CRLD)anchor cables that can monitor slope stability.Relevant research was carried out by taking four hazardous profiles of the Antaibao Open-pit Coal Mine in China as examples.The results show that slope instability under rainfall infiltration conditions can be divided into four stages through numerical simulation analysis combined with the actual on-site failure process:surface scouring,surface settlement,crack propagation,and shear slip.The slope angles were optimized for the four hazardous profiles with historical landslide occurrences,and the optimization results were verified using field monitoring data.When the slope angles of A-A′,B-B′,C-C′and D-D′dangerous sections are 34°,32°,33°and 33°respectively,the safety,stability,and economic rationality of the slope can be guaranteed.This study provides a theoretical basis and practical reference for slope angle optimization under similar engineering geological conditions.