基于渗流-应力场耦合的地下连续采矿围岩稳定性仿真实验  

Simulation experiment for stability of surrounding rock in underground continuous mining based on stress-seepage coupling

作　　者：曹妙聪[1] 谷中元 钱正昆 CAO Miaocong;GU Zhongyuan;QIAN Zhengkun(School of Prospecting&Surveying Engineering,Changchun Institute of Technology,Changchun 130000,China;School of Resources and Environmental Engineering,Wuhan University of Technology,Wuhan 430070,China)

机构地区：[1]长春工程学院勘查与测绘工程学院,吉林长春130000 [2]武汉理工大学资源与环境工程学院,湖北武汉430070

出　　处：《实验技术与管理》2023年第8期114-119,共6页Experimental Technology and Management

基　　金：吉林省教育厅科学技术研究项目(JJKH20210669KJ);长春工程学院科技基金项目(320210001)。

摘　　要：富水条件下,地下采矿工程的稳定性必须要考虑渗流作用的影响。以某矿山为研究对象,采用有限元连续介质分析法,模拟渗流场-应力场耦合作用下采区围岩的动态损伤规律。结果表明,随开采步距的增加,渗流场向掘进面方向发展,采场顶板的水压力和沉降量均增大,在开采步距84 m之前,增长较为缓慢,之后增长迅速。通过等效数值模型计算,确定最终的合理充填步距,设计合理的充填方案为:开采步距为84m时充填步距为72 m,至开采步距为144 m时充填步距为48 m,至开采步距为180 m时,充填步距为36 m。Under the condition of rich water,the influence of seepage must be considered in the stability of underground mining engineering.Taking a mine as the research object,the finite element continuum analysis method is used to simulate the dynamic damage law of surrounding rock in the mining area under the effect of stress-seepage coupling.The results show that with the increase of the mining step,the seepage field develops towards the heading face,and the water pressure and settlement of the stope roof increase.Before the mining step of 84 m,the increase is slow,and then it increase rapidly.Through equivalent numerical model calculation,the final reasonable filling step is determined.The reasonable filling scheme is as follows:When the mining step is 84 m,the filling step is 72 m,when the mining step is 144 m,the filling step is 48 m,and when the mining step is 180 m,the filling step is 36 m.

关 键 词：地下采矿 耦合分析 采场稳定 合理步距 

分 类 号：TD853[矿业工程—金属矿开采]