煤矿冲击地压的发生机理极其复杂,是煤岩体非线性破坏、失稳矿山压力显现的总称.在分析煤岩体破坏机理和采动影响的基础上,应用能量积聚-释放诱发冲击地压的原理设计了煤岩体组合力学模型及模拟煤岩体突出的结构失稳加载试验系统试验,并配制、筛选大变形突出倾向性相似材料等方面进行了组合体结构加载失稳试验,获得了煤岩结构失稳与位移突出的特征.试验表明:组合体试件在加卸载过程中和破坏失稳时表现为稳定态能量积蓄、非稳态释放特征,是应力环境、材料强度与结构等多种因素影响的非线性动力学过程.%Mechanism of coal bump which refers to a sudden and violent failure of a coal seam is most complicated. The occurrence of coal bump is the process of nonlinear failure or collapsing phenomenon ofrncoal seam. Based on research on the mechanism of coal-rock mass failure and mining induced stress, this study presented the mechanical model of coal-rock mass and the test system of simulating coal bump by the theory of structure instability and the concept of energy accumulation and delivery. Meanwhile,large deformation and coal bump prone materials were selected. From the compress experiment of coal-rock mass, the characteristic of structure instability, velocity and displacement of coal-rock mass were a-chieved. It is predicted that elastic strain energy is accumulated in the process of compression and released when the specimen is failure. The results of the experiments showed that the failure of coal-rock mass is a kind of strata behavior induced by ground stress (including in situ stress and rock pressure) , materials strength and structure feature.
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