数值模拟在采空区对地表稳定性影响分析中的应用

Application of numerical simulation on the analysis of the influence of mining-out area to the surface stability

针对矿产资源开发中矿体回采所形成的采空区对地表稳定性影响进行了分析。以云南东川某铜矿区内的局部采空区为例,采用有限元分析软件(ANSYS)建立地质模型,运用三维快速拉格朗日法软件(FLAC 3D)对其进行计算,地表布置了监测点,工程区典型位置处进行了切片,通过对最大不平衡力时步曲线、地表监测点、各切片Z方向位移及各切片竖直方向的应力状态进行了研究,对采空区的稳定性进行了科学分析与评价,为确保矿山安全生产提供参考。

In view of the development of mineral resources,the paper has analyzed the surface stability influence of the mining-out area for the mining of ore bodies.For an example of local mining-out area in Dongchuan copper deposit in Yunnan,finite element analysis software(ANSYS)is applied to establish the geological model and three-dimensional Lagrange analysis software(FLAC 3D)is used to calculate the numerical data.In the model,the monitoring points are arranged on the surface and the typical section is analyzed at the important places in the project area.The maximum unbalanced time-stepping stress curve is diagrammed,and Z direction displacement and the vertical direction section stress state of the monitoring points in the surface and in the different sections are studied as well.The stability of mining-out area is scientifically analyzed and evaluated.It can be referred to guarantee the production safety in the mine.