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利用UDEC软件对不同采高上保护层开采卸压效应进行了数值模拟,得到了在不同采高的上保护层开采时,被保护层在开采过程中的应力和位移变化规律,结果表明:上保护层开采后,采空区下部的被保护层垂直应力随着采高的增加而减小,垂直位移随着采高的增加而升高.为预防煤与瓦斯突出,优化卸压瓦斯抽采系统,提高卸压瓦斯抽采浓度、抽采量以及抽采率提供了一定理论依据.
UDEC software was used to simulate the pressure relief effect of different mining upper protective layer mining. The law of stress and displacement of the protective layer mining during the mining of the upper protective layer with different mining height was obtained. The results show that: After mining the protective layer, the vertical stress of the protective layer in the lower part of the goaf decreases with the increase of mining height, and the vertical displacement increases with the increase of the mining height.In order to prevent the coal and gas outburst, System, to improve the concentration of relief gas extraction, extraction and extraction rate provides a theoretical basis.