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以冲击媒体破裂与失稳过程的试验、数值模拟计算研究为基础,将煤体的破裂变形分为三个阶段:弹性阶段、非线性阶段与突变阶段。用三个特征量描述了煤体扩容变化的过程:体积压缩、稳定扩容及扩容突变。建立了冲击地压的扩容模型,扩容理论解释了冲击地压前兆信息的稳定性与突变性,是冲击地压前兆信息识别的理论基础。
Based on the experiments and numerical simulations of the process of impact and instability of medium, the rupture deformation of coal body is divided into three stages: elastic stage, nonlinear stage and abrupt change stage. Three characteristic quantities are used to describe the process of coal mass expansion: volumetric compression, steady expansion and expansion mutation. The expansion model of rockburst is established. The theory of dilatancy explains the stability and abrupt change of prestressed rockburst information, which is the theoretical basis for the identification of rockburst information.