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详细分析了煤壁破坏的一般机理,结合邢台东庞矿2612大采高工作面实际,总结了煤壁破坏的主要形式,建立了大采高仰采工作面含有夹矸煤层煤壁破坏的力学模型,得出了顶板压力、夹矸厚度、仰采角度、煤体内聚力等对煤壁稳定性有较大影响,其中缓解煤壁的顶板压力是防止煤壁破坏的最有效措施。通过理论分析、UDEC数值模拟等研究了夹矸煤层煤壁注浆加固的合理钻孔位置和参数,得出最佳的布孔位置是注浆孔要和煤壁破坏的起坏点位置一致。同时介绍了2612大采高工作面实际的煤壁注浆工艺和实施效果。
The general mechanism of coal wall failure is analyzed in detail. Based on the actual mining face of 2612 coal mining face in East Pangang, Xingtai, the main forms of coal wall damage are summarized, and the mechanical model of coal wall damage with coal gangway in the face of coal mining is established. It is concluded that the pressure of the top plate, the thickness of the gangue, the angle of Yang mining and the cohesion of the coal have a great influence on the stability of the coal wall. Among them, relieving the pressure on the top of the coal wall is the most effective measure to prevent the destruction of the coal wall. Through theoretical analysis and UDEC numerical simulation, the reasonable drilling position and parameters of coal wall grouting reinforcement in gangue seam are researched. The best position of the hole is the same as the position of the damaged point of the coal wall. At the same time, the actual coal wall grouting technology and implementation effect of 2612 large mining face are introduced.