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将岩体内共线多节理受压剪荷载的问题简化为有限宽岩体内的单节理受压剪荷载的问题，运用弹塑性断裂力学的线场分析方法将描述岩体材料破坏特性的摩尔－库仑准则列入求解岩体内节理断裂问题的基本方程中对节理裂隙在压剪荷载下进行求解。通过在节理线上提出合理的边界条件，得出了节理线附近的弹塑性区应力场。利用弹塑性场在其边界上的匹配条件得出了节理线上塑性区长度与压剪荷载的关系以及节理扩展破坏规律。
The problem of collinear multi-joint compressive shear load in rock mass is simplified to single-joint compressive shear load in finite-width rock mass. Using the method of line-field analysis of elasto-plastic fracture mechanics to describe the failure characteristics of rock mass, - Coulomb criterion is included in solving the basic equations of joint fracture in rock mass. The joint cracks are solved under the condition of compressive shear load. The elastic-plastic zone stress field near the joint line is obtained by proposing reasonable boundary conditions on the joint line. The relationship between the length of plastic zone and the compressive and shear load and the rule of joint failure are obtained by using the matching conditions of the elastic-plastic field on its boundary.