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离散元法是70年代初发展起来的一种分析节理岩石的数值方法.这种方法充分地考虑到节理岩石的不连续性,以裂隙切割成的块体为出发点,各个块体可以有较大的位移,在特殊情况下,例如顶板冒落,岩块还可以脱离母体而自由下落.离散元法的基本原理是牛顿第二运动定律结合不同的本构关系,以动力松弛法按时步进行迭代求解.本文用离散元法对矿山压力进行了初步研究,结果表明离散元法在研究矿山压力和顶板管理时较有限元法和边界元法有许多可比拟的优点,所得结果并可与相似材料模型试验进行 对比.
The Discrete Finite Element Method (FEM) is a numerical method developed in the early 1970s to analyze jointed rocks.This method fully takes into account the discontinuity of jointed rock, starting from the block that the fractured rock is cut into, each block can have a larger Of the displacement, in exceptional circumstances, such as roof caving, rocks can also be free to leave the mother body.The basic principle of discrete element method is Newton’s second law of motion combined with different constitutive relations, dynamic relaxation method in time step iteration The results show that the discrete element method has many advantages compared with the finite element method and the boundary element method in the study of mine pressure and roof management, and the results obtained can be compared with similar materials Comparison of model tests.