有限元法在地应力研究中的应用

有限元法是一种可以在计算机上用软件来实现的数值模拟方法,对地应力场的研究有很大的帮助。介绍了有限元法的应用背景、应用原理和思路、应用前景等,论述了有限元法在地应力场研究中的作用,指出依据实测的地应力资料,结合区域构造格架、材料属性和单元类型、网格划分、边界约束条件、反演检验等要素,利用有限元法建立研究区域地应力场计算模型,相应地得出该地区的地应力场分布情况,通过反演检验、不断调整计算模型,使模拟的地应力场分布情况与实际情况最大程度地接近,从而可以解决地应力场在平面和空间上的展布问题,为油气田的地质勘探、工程开发和煤田的开采提供理论依据。

Application of the Finite Element Method to the Research of In-Situ Rock Stress

The finite element method is a numerical simulation method based on the computer software,which has a great help to the research of in-situ rock stress field.The background,principle,and prospect of the application of the finite element method were introduced.The application of the finite element method in the research of in-situ rock stress field was mainly described.According to the observed data,and considering the regional tectonic framework,material properties and unit types,grid partition,boundary constraints,and inversion test,computation model of the tectonic stress field in the study area was established by adopting the finite element method.The distribution of the tectonic stress field in the study area was obtained by this model.The simulant distribution was made more and more close to the actual situation to the maximum extent through the inversion test and the adjustment of the calculation model,so as to solve the problem of surface exhibition and space distribution for the tectonic stress field.It could provide the theoretical basis for the exploration and development of oil & gas fields,and also for the mining of coal fields.