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基于理论分析和数值模拟技术,对特厚煤层大采高综放采场矿压特征的埋深效应进行了系统的研究。研究结果表明:地应力、煤体的支承压力、顶板岩层进入塑性屈服状态的高度和范围,底煤、顶煤和顶板超前破坏距离与范围,垂直应力峰值以及应力峰值超前工作面距离等均会随着埋深增加而逐渐增大;同时,控顶区内顶煤下沉量随埋深的增大呈对数规律增大。
Based on the theoretical analysis and numerical simulation, the depth effect of the strata pressure characteristics of the fully mechanized top coal caving mining face in the thick seam is systematically studied. The results show that both the stress of the ground, the supporting pressure of the coal body, the height and the range of the top rock strata entering the plastic yielding state, the distance and the range of the advance destruction of the bottom coal, the top coal and the roof, the vertical stress peak, With the increase of burial depth, it gradually increases. Meanwhile, the top coal subsidence in controlled roof area increases logarithmically with the increase of burial depth.