【摘要】 <正> 地质体有着十分复杂的结构和构造,因此,如何掌握地质体中各点的位移规律和应力分布规律,对工程地质研究,预测矿山边坡稳定性和地下工程稳定性,地震预测和预报以及地质构造形变的规律都是十分重要的。数值模拟是研究形变规律和应力场分布的重要手段之一。有限单元法是数值模拟的有利计算工具之一,国内外已得到广泛的应用。地质体中各点的形变及应力分布问题实际上是个三维问题。有些情况将它简化为二更多还原

【Abstract】 The tectonic displacement field in a geological body is usually controlled by properties of fault planes within the body. In order to study how normal and shear stiffnesses of fault planes control the distribution of tectonic displacement field, we assumed a geological body model with the width of 100 km, leng-th of 100 km, and depth of thirty km. There are two large faults which run throughtout the body, parallel to each other.Three condition sets for the fault planes have been designed and simulated. The first one is the fault planes with strong normal and shear stiffnesses, the computed result shows that both of the faults are not active. The second one is the fault planes with weak normal and shear stiffnesses, the result obtained shows that the faults are strongly-active. The last one is the faults consist of different normal and shear stiffnesses, with weak stiffnesses in the front parts, moderate stiffnesses in the middle parts and strong stiffnesses in the last portion of the two faults the computed result shows that the activities of both faults vary from strong to weak.Displacement and stress fields were computed by a three dimension finite element programm with joint element and the stereo-displacement maps of the body were automatically ploted.更多还原