近距离煤层群下邻近层增透效应及卸压瓦斯治理技术研究

Study on Technology of Lower Adjacent Coal Seams in Mine Permeability Improved Effect and Pressure-relief Gas Extraction

为了解近距离煤层群开采过程中下临近层大量卸压瓦斯通过底板裂隙涌向采煤工作面易造成瓦斯超限的问题,以晋城矿区某矿为工程应用背景,采用FLAC^(3D)模拟了采动过程中下伏煤岩卸压增透效应和被卸压煤层膨胀变形情况。通过现场实际监测证明,采用底板拦截钻孔可以区域性地消除卸压煤层的突出危险性,实现煤与瓦斯突出危险煤层的安全开采。

In order to understand the problem of overburdening lrom the bottom oI the coat seam m me near coal seam, it is easy to cause the problem of gas exceeding the limit in the coal mining face. The FLAC3D is used to simulate the mining process in the Jincheng mining area. Pressure relief effect of lower coal and rock and deformation and deformation of unloaded coal seam. Through the actual monitoring of the site proved that the use of floor block drilling can be regional to eliminate the outstanding risk of unloading coal seam, coal and gas outburst dangerous coal seam safe and efficient mining.