低瓦斯矿井煤层基本瓦斯参数测定与应用

为了治理低瓦斯矿井工作面回风流及上隅角瓦斯超限问题, 利用工作面瓦斯涌出量、瓦斯参数实际测定法, 实测了工作面瓦斯涌出构成, 其中, 本煤层约占26 0%, 邻近层约占74 0%,并从上隅角集中涌出; 根据实测的煤层瓦斯压力、瓦斯含量、煤层透气系数及钻孔瓦斯流量衰减系数等, 评价本煤层属于极难抽放煤层, 提出了下行风加专用排瓦斯巷和采空区瓦斯抽放2套治理措施。现场应用表明, 高位钻孔法抽放瓦斯效果较好。

Mensuration and application of gas parameter in low gas mine

To control the gas going beyond the limit in working face and at upper corner in low gas mine, by applying the mensuration of gas parameter and the quantity of gas emission in working face, the quantity of coal gas emission occupies about 26%, the quantity of adjacent coal gas emission occupies about 74% and emitted concentrately at the upper corner. According to the gas pressure, gas content, gas permeability coefficient and bore gas runoff attenuation coefficient, etc., it was been estimated that gas drainage from the coal is very difficult, two kinds of prevention and control methods are put forward, namely, down airiness and letting gas laneway to be used wholly, and gas drainage from the goaf. The experiment that the effect of perch bore gas grainage is better then the others have proved it.