【摘要】 运用耦合无界元的弹塑性有限元法，对大厂91号矿体开采过程中的稳定性进行了分析与预测，并用数值方法得出了充填体的暴露高度。在模拟过程中，考虑了分步开挖，充填效应，采用沿开挖洞周释放荷载的内加载模型。在充填体与岩体的交接处使用无厚度节理单元，有效地模拟了充填效应。更多还原

【Abstract】 The elasto-plastic finite element method coupled with infinite elements was used to analyze and predict the stability of No.91 orebody in the process of mining,and the numerical method was used to obtain the exposure height of filIbody. In the process of modelling,the step-by-step excavating and the filling effect were taken into account,and the internal loading model that the stress released along the surrounding of excavation was used. As for the location where the fillbody touched with rock mass,the thicknessless joint elements were used so that the filling effect were modeIled effectively.更多还原