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基于弹塑性力学和损伤力学原理,考虑到煤岩体内部存在大量节理裂隙,在弹塑脆性模型的基础上增加了结构面单元,构建了体能势函数,建立了能量的积聚、耗散与煤岩动态变形破裂过程之间的联系,并以此为依据从能量角度建立了体元-区域-系统冲击地压模型.结果表明:冲击地压是含结构面煤岩体组成的力学平衡系统在外界扰动作用下的失稳现象;基于该模型分析了煤岩系统在不同应力状态下变形破坏的演化规律及相应的地球物理信号特征;对跃进煤矿23130掘进工作面电磁辐射监测数据进行分析,验证了该模型的正确性.
Based on the elastoplastic mechanics and damage mechanics, considering the existence of a large number of joints and cracks in the coal and rock mass, based on the elastic-plastic brittleness model, the structural surface elements are added and the potential energy function is built. The energy accumulation, dissipation and coal Rock-rock dynamic deformation and rupture process, and based on this, a voxel-region-system rock burst model is established from the energy point of view.The results show that rockburst is a mechanical equilibrium system composed of coal and rock mass with structural facets Based on the model, the evolution law of deformation and failure of coal and rock system under different stress conditions and corresponding geophysical signal characteristics are analyzed. The electromagnetic radiation monitoring data of 23130 heading face in Yuejin Coal Mine are analyzed and verified The correctness of the model.