沁新煤矿2~#煤层瓦斯抽放可行性研究

Study on Feasibility of Gas Drainage in 2~# Coal Seam of Qinxin Coal Mine

为了准确评价沁新煤矿2#煤层瓦斯抽放的可行性,实测了该煤层瓦斯含量。同时,在该煤层施工3个钻孔进行煤层瓦斯涌出衰减系数和煤层透气性系数的测试。测试结果显示,该煤层最大瓦斯含量为6.127 m3/t,钻孔自然瓦斯流量衰减系数为0.023~0.035 d-1,煤层的透气性系数在0.195 3~0.309 0 m2/(MPa2·d)。依据上述参数并结合相关规定,沁新煤矿2#煤层瓦斯抽采是可行的。

In order to evaluate the feasibility of gas drainage in 2#coal seam of Qinxin coal mine accurately, the gas content of this coal seam has been measured. At the same time, the attenuation coefficient of coal seam gas emission and the permeability coefficient of coal seam are tested in 3 boreholes in this coal seam construction. The test results shows that the maximum gas content of this coal seam is 6.127 m^3/t, the attenuation coefficient of natural gas flow in borehole is from 0.023 to 0.035 d^-1, and the permeability coefficient of coal seam is from 0.195 3 to 0.309 0 m^2/（MPa^2·d）.According to the parameters above and related regulations, coal seam gas drainage is feasible in Qinxin coal mine.