考虑到节理岩体的结构特点及岩块之间的局部非线性相互作用，运用多刚体系统动力学的理论方法，借助于Bond破碎理论，建立了节理岩体在爆炸载荷作用下块度预测的力学模型。将节理分布特征、爆破机理及块度分布计算紧密地联系在一起，避免了以往各环节脱节的不足。 Considering the structural characteristics of the jointed rock mass and the local nonlinear interaction between the rock masses, the theory of multi-body system dynamics is used to establish the block prediction of the jointed rock mass under the blast load Mechanical model. The joint distribution of features, the mechanism of explosion and the distribution of the degree of block are closely linked together to avoid the lack of previous links out of step.