同安煤矿远距离上保护层开采保护效果初探
Research on Mining Protective Effect in the Long Distance Upper Protective Seam of Tong'an Coal Mine
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摘要: 以同安煤矿远距离上保护层开采作为研究对象,通过测定同安煤矿下部15#突出煤层瓦斯压力、瓦斯流量、煤层透气性和煤层相对变形等参数变化情况,研究该矿5#煤层作为上保护层对下部15#煤层的防突保护效果。结果表明:下保护范围内的15#煤层原始瓦斯压力显著下降,煤层相对变形增加到2.41‰,瓦斯流量增加了67倍,透气性系数增加了115倍。5#远距离上保护煤层对下部15#被保护煤层起到了较好的保护作用。Abstract: The long distance upper protective seam mining in Tong'an Coal Mine is considered as the research object in this paper. Through testing the parameters change in the 15th outburst coal seam of Tong'an Coal Mine, which include gas pressure, gas flow, permeability, relative deformation, it studies the outburst protection effect that the 5th coal seam as upper protective seam gives the lower 15th coal seam effective protection. The results show that the original gas pressure of the 15th coal seam drops obviously within the lower protected scope, the relative deformation increases to 2.41 ‰, gas flow increases in 67 folds and the permeability coefficient increases in 115 folds. The 5th long distance upper protective seam gives the lower 15th protected coal seam a good protective effect.
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