Stability Evaluation of Open-face Slope under Combined Mining Conditions of Jiama Polymetallic Mine
Received:February 27, 2020  Revised:April 02, 2020
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KeyWord:combined mining; overburden movement; slope stability; numerical simulation
        
AuthorInstitution
WU Dan 矿冶科技集团有限公司;国家金属矿绿色开采国际联合研究中心
WANG Zhixiu 矿冶科技集团有限公司
YU Shibo 矿冶科技集团有限公司
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Abstract:
      In order to study the influence of underground mining on the stability of open pit slope under open-underground combined mining conditions, this paper uses numerical simulation method, combined with the engineering geological conditions and mining methods of the mine to establish a large-scale three-dimensional geological model. Perform calculation analysis. The analysis results show that the roof overburden after a large-scale underground filling mining has a certain degree of subsidence. During the mining and filling process of the ore body, the supporting effect on the overburden is mainly achieved by the surrounding column and the surrounding rock around the panel. After the mining of the underground ore body is completed, the western side of the crater pit is deformed relatively strongly, but the deformation of the area is small. Therefore, large-scale underground filling mining has little effect on the stability of open slopes.
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