大型露天矿岩体工程地质分区及边坡岩土强度参数取值  

Engineering geological zoning of rock mass and parameter value of rock soil strength of slope in large open-pit mine

作　　者：李其在 董志富 周癸武 Li Qizai;Dong Zhifu;Zhou Guiwu(Yunnan Gold Mining Group Co.,Ltd.)

机构地区：[1]云南黄金矿业集团股份有限公司

出　　处：《黄金》2023年第8期35-43,共9页Gold

摘　　要：露天采场的开采过程中地质情况被逐步揭露,因此单一的边坡设计及施工参数无法适应复杂的工程地质条件,必须要进行工程地质分区,合理优化边坡参数。以某大型露天矿山为研究对象,对已揭露的地层进行划分,同时进行现场结构面调查分析,建立完善的地质模型,根据影响因素的不同对采场进行工程地质分区,在各地质分区基础上选择典型剖面分析破坏模式。通过室内试验及工程类比法确定岩土强度参数取值,根据边坡整体稳定和台阶边坡局部稳定状态,分别对冲洪积层、灰岩、灰岩破碎带和斑岩破碎带的强度参数进行了反分析,给出了露天采场边坡岩土强度参数取值。In the mining process of open-pit stope,geological conditions are gradually revealed,so a single slope design and construction parameter can not adapt to the complex engineering geological conditions.Therefore,it is necessary to carry out engineering geological zoning,and reasonable optimization of slope parameters.Taking a large open-pit mine as the research object,the exposed strata were divided,and at the same time,the site structural plane investigation and analysis were carried out to establish a complete geological model.According to the different influencing factors,the stope was divided into engineering geological zones,and the typical section was selected to analyze the failure mode on the basis of each geological zone.The rock soil strength parameters were determined by laboratory test and engineering analogy method.According to the overall stability of slope and the local stability of step slope,back analysis for the strength parameters of alluvial layer,limestone,limestone fracture zone and porphyry fracture zone respectively was carried out,and the recommended value of rock soil strength parameters of open-pit stope slope was given.

关 键 词：露天开采 工程地质分区 岩土强度参数 反分析 地质模型 

分 类 号：TD853[矿业工程—金属矿开采]