云冈矿矿井煤层瓦斯赋存参数测定与瓦斯抽放可行性研究

CMM in Yungang Coal Mine:a coal seam gas occurrence parameter test and gas extraction feasibility study

通过对云冈矿12#煤层瓦斯基础参数的测定以及瓦斯涌出量的预测分析,进行了瓦斯抽放可行性研究,结果表明,云冈矿12#煤层瓦斯涌出量达到了建立抽放瓦斯系统的必要条件,然而煤层钻孔瓦斯流量衰减系数α在0.0423~0.1609 d-1,基本大于0.05 d-1,瓦斯衰减过快,较难抽放,故适合对12#煤层临近层和采空区瓦斯抽放。

A CMM extraction feasibility study is carried out on the basis of a test of the seam gas basic parameters of the Mine＇s #12 coal seam and a forecast analysis of seam gas inflow rate.The study result indicates that the inflow rate of CMM in #12 coal seam is in conformity of the necessary conditions for setting up a coalbed methane extraction system.On the other hand,the attenuation coefficient of the CMM flow in coal seam drill holes has the value of 0.0423 ~ 0.1609/d,roughly larger than 0.05/d.This indicates that the coal seam gas has a very severe attenuation rate which means the gas extraction will be difficult.In line of this phenomenon,it is more appropriate to carry out the gas extraction from the contiguous coal seam or from the gob area of #12 coal seam.