湖北宜昌樟村坪震旦系磷矿层开采稳定性分析  

Mining stability analysis of Sinian phosphate rock strata at Zhangcunping town, Yichang city, Hubei province

作　　者：WAQAR Muhammad Faisal 李姝仪 晏冬平 王涛[1] WAQAR Muhammad Faisal;LI Shuyi;YAN Dongping;WANG Tao(State Key Laboratory of Water Resources and Hydropower Engineering Science,Wuhan University,Wuhan 430072,China)

机构地区：[1]武汉大学水资源与水电工程国家重点实验室,湖北武汉430072

出　　处：《武汉大学学报（工学版）》2022年第8期773-780,共8页Engineering Journal of Wuhan University

基　　金：国家自然科学基金海外及港澳学者合作项目(编号:51428902);武汉大学“双一流”建设引导专项项目(2021)。

摘　　要：以湖北省宜昌市樟村坪地区磷矿采场Ph矿层地下开采为研究背景,采用基于Mohr-Coulomb强度准则的弹塑性本构模型,运用FLAC软件进行计算分析,依据计算结果对矿区开采的稳定性进行评价。模拟了非充填采空区和充填采空区的开采,比较了2种条件下采空区的应力、位移和塑性区分布及变化情况,验证了在缓倾斜磷矿体内实施房柱式开采系统的可行性,最后得出充填采矿方法可以保证樟村坪震旦系磷矿层开采的稳定性和安全性的结论。Phosphate rock is a non-clastic sedimentary rock and is an important mineral commodity used in chemical and food production. In this paper, based on the background of underground mining in Phseam of the phosphate ore stope in Zhangcunping town, Yichang city, Hubei province, the elastic-plastic constitutive model based on Mohr-Coulomb strength criterion is adopted, and the software FLACis used for calculation and analysis. According to the calculation results, the stability of mining in the mine area is evaluated. This paper simulates the minings in non-filling goaf and filling goaf, and compares the distribution and change of stress,displacement and plastic zone in the two conditions. The feasibility of the implementation of chamber and column mining system inside the gently inclined phosphate rock is verified. Finally, it is concluded that the filling mining method can guarantee the stability and safety of the Sinian phosphate rock strata mining in Zhangcunping town.

关 键 词：磷矿 Mohr-Coulomb强度准则 FLAC3D 充填采空区 

分 类 号：TD87[矿业工程—非金属矿开采]