超厚中风化层高陡边坡稳定性研究  

Study on Stability of High and Steep Slope with Extra-Thick and Moderately Weathered Layer

作　　者：李真 郭敏 LI Zhen;GUO Min(Changsha Institute of Mining Research Co.,Ltd.,Changsha,Hunan 410012,China;Sichuan Coal Field Dadi Investment Co.,Ltd.,Chengdu,Sichuan 610072,China;Hunan Province Geological Disaster Prevention Yu Environment Reengineering Rngineering Technology Research Center,Changsha,Hunan 410012,China)

机构地区：[1]长沙矿山研究院有限责任公司,湖南长沙410012 [2]四川煤田大地投资有限公司,四川成都610072 [3]湖南省地质灾害防治与环境再造工程技术研究中心,湖南长沙410012

出　　处：《中国锰业》2024年第4期42-46,52,共6页China Manganese Industry

摘　　要：风化作用使岩石强度降低,进而导致边坡岩体的力学性能大幅度下降,因此露天矿山高陡边坡主要以微风化岩体为主,而以中风化岩体为主的边坡通常设计较为平缓,高度也多为30~50 m。对某钼矿完整性好的超厚中风化层高陡边坡稳定性进行研究,采用极限平衡法计算爆破振动力作用下的边坡安全系数,并根据计算结果对边坡参数进行优化,为下一步的设计提供技术支持。结果表明:边坡稳定性主要受到岩石强度和岩体完整性2个方面因素的影响,深部的中风化层如果节理裂隙发育减少,岩体完整性提升,边坡的稳定性也得到改善,完整性好的超厚中风化层也可以设计为高陡边坡。Weathering reduces the strength of rock,which in turn leads to a great decline in the mechanical properties of slope rock mass.Therefore,the high and steep slopes of open-pit mines are mainly lightly weathered rock mass,while the slopes dominated by moderately weathered rock mass are usually designed gently,and the height is mostly 30~50m.In this paper,the stability of an ultra-thick moderately weathered high-steep slope in a molybdenum mine site with good integrity is studied,and the slope safety factor under the effects of blasting vibrations is calculated by the limit equilibrium method,and the slope parameters are optimized according to the calculation results,which provides technical support for the next design.The results show that the slope stability is mainly affected by two factors:rock strength and rock mass integrity.If the development of joints and cracks in the deep moderately weathered layer is reduced,the rock mass integrity is improved,and the slope stability is also improved.The ultra-thick moderately weathered layer with good integrity can also be designed as a high and steep slope.

关 键 词：超厚中风化层 高陡边坡 岩体完整性 边坡参数优化 

分 类 号：TD863[矿业工程—金属矿开采]