基于ANSYS数值模拟的人工假底设计与安全性分析

为了实现白象山矿区的顶底柱安全回采,有效提高资源的回收利用率,通过“薄板”力学模型下的力学分析及Ansys有限元数值模拟对不同参数条件下白象山矿区人工假底构筑工艺进行了优选。分析了3种不同人工假底构筑材料分别在不同假底布置厚度与不同回采率情况下人工假底的力学及位移参数。并结合安全系数方法对44种模型进行了安全稳定性评价分析。结果显示：在保证开采经济最优化原则条件下,得到了安全可行、经济最优的人工假底构筑工艺,即采用2.0 MPa充填体材料构筑2.5 m厚人工假底,隔一采一间隔回采,可以保证50%顶底柱回收安全。本研究成果可直接指导工程设计与施工。

Design of Artificial False Bottom and Its Safety Analysis Based on ANSYS Numerical Simulation

In order to achieve the safe recovery of the top and bottom pillars in the Baixiangshan mining area, and to improve the effective recovery and utilization of resources, the artificial bottom construction process under different parameters in the Baixiangshan mining area are optimized through the mechanics analysis of thin plate mechanics model and Ansys finite element numerical simulation. The mechanical and displacement parameters of three different artificial substructures with different thickness of artificial substructures and different recovery rates are analyzed. The safety and stability of the 44 models is evaluated and analyzed, combining with the safety factor method. The results show that on the premise of guaranteeing the economic optimization of mining, a safe, feasible and economical construction technology of artificial false bottom is obtained, that is, 2.5 m thick artificial false bottom is constructed with 2.0 MPa filling material, and the safety of 50% top and bottom pillar recovery can be guaranteed by the “one- interval-one mining”. The research results can directly guide the engineering design and construction.