The effects of dip angles and thicknesses of bedding layers at the interaction line in between the planes of a normal fault and bedding layers are numerically studied by a discrete element modelling technics. The calibration of the numerical method is accomplished by using an inverse-modelling approach. The laboratory results of Brazilian tensile tests may be used to measure the micro-mechanical parameters of the intact rocks. The shear test results are also performed on the rock joints to determine the micro-mechanical parameters of the bedding interfaces in the present simulation work. The numerical simulation of the shear behaviour of normal fault is performed by making box models with dimensions of 100 mm × 72 mm to represent the bedding layers with different dips and thicknesses. The bedding plane dip angles change from 0° to 165° with an increment of 15° and the thicknesses of these layers change from 6 mm to 12 mm with an increment of 6 mm. The shear testing conditions are exposed to these models to form the normal faults for the numerical modelling of the physical problem under a lateral pressure of 2 MPa. The numerical modelling results show that the shear cracks initiate from all of the bedding interfaces. In this numerical modelling, three major oriented parallel tensile bands are developed and one vertical tensile fracture also propagates through the shear band so that the model is failed. As the bedding layers’ dips are increased, the angle in between the shear bands and the bedding layers is decreased, and as the bedding thickness is decreased, the lengths of shear bands are increased. However, when the bedding angles are 120° and 135° the minimum shear strength of the model is occurred.

利用离散元建模技术，对法向断层与地层之间相互作用线处的倾角和地层厚度的影响进行了数值研究。数值方法的校准是通过使用逆建模方法来完成的。巴西拉伸试验的实验室结果可用于测量完整岩石的微机械参数。在当前的模拟工作中，还对岩石节理进行了剪切测试结果，以确定层理界面的微机械参数。通过建立尺寸为100 mm×72 mm的箱形模型来表示正常断层的剪切行为的数值模拟，以表示具有不同倾角和厚度的层理层。铺垫平面的倾角以15°的增量从0°更改为165°，这些层的厚度以6 mm的增量从6 mm更改为12 mm。剪切测试条件暴露于这些模型以形成正常断层，以在2 MPa的侧向压力下对物理问题进行数值模拟。数值模拟结果表明，剪切裂纹始于所有层理界面。在该数值模型中，开发了三个主要的定向平行拉伸带，并且一个垂直拉伸断裂也通过剪切带传播，从而使模型失效。随着垫层倾角的增加，剪切带与垫层之间的夹角减小，并且随着垫层厚度的减小，剪切带的长度也增加。然而，