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为了研究急倾斜厚煤层综放开采覆岩运移规律,结合矿山压力及其岩层控制相关理论分析急倾斜煤层上覆岩层“三带”特征,运用数值模拟软件UDEC和FLAC~(3D)对急倾斜综放开采在30°、45°、60°倾角条件下上覆岩层运移形态进行了模拟,得到了相应的覆岩移动变形规律,“三带”分布、高度及应力云图。研究结果表明:通过理论分析和数值模拟验证了急倾斜煤层工作面推进过程中覆岩运移规律与水平煤层不同,“三带”高度升高,且沿倾向随角度增大工作面上端头运移量较大,矿压显现明显,工作面下端头围压较大。
In order to study the rule of overburden strata movement in fully mechanized top coal caving mining in steep-inclined thick seam, numerical simulation software UDEC and FLAC 3D are applied to analyze the characteristics of overburden strata of steeply-inclined coal seam with the theory of mine pressure and its control. The movement patterns of overlying strata in steep-inclined fully mechanized top-coal caving mining under the conditions of 30 °, 45 ° and 60 ° inclination are simulated and the corresponding law of overlying strata movement and deformation, the “three-zone” distribution, the height and stress map . The results show that the rule of overlying strata migration is different from that of horizontal coal seam during the advancing process of steep coal seam working face through theoretical analysis and numerical simulation. The height of “three strata” The head of the larger amount of transport, mine pressure obvious, under the face of confining pressure greater.