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在实测资料、模拟实验及工作面矿压显现特征的基础上,对综放工作面矿压显现内在机理及上覆岩体的平衡结构进行了分析研究.综放工作面上覆岩层存在着比分层开采层位更高的平衡结构,以大变形梁的形式存在.结构的活动是一逐渐变化的过程,在这一过程中,平衡结构与其下的顶板及顶煤相互作用,这种作用方式与顶煤的多次损伤有关.根据顶煤的损伤因子D、顶煤应变ε可以确定出合理的支护阻力,而ε可由大变形梁的位移及顶板的变形推出.
Based on the measured data, the simulation experiment and the characteristics of mine pressure, the internal mechanism of overlying strata in the fully mechanized top coal caving face and the balance structure of the overlying rock mass are analyzed and studied. The stratified mining has a higher equilibrium structure in the form of a large deformation beam, and the structural activity is a gradual process in which the equilibrium structure interacts with the roof and the top coal below it The method is related to the multiple damage of the top coal.According to the damage factor D of the top coal and the top coal strain ε, the reasonable support resistance can be determined, and ε can be deduced from the displacement of the large deformation beam and the roof deformation.