利用掘进工作面瓦斯涌出相对渗透性特征预测煤与瓦斯突出的方法研究

摘要

利用掘进工作面煤壁渗透瓦斯涌出量占掘进工作面整体瓦斯涌出量的比例及其变化情况，反映工作面煤体相对渗透性的发展状态及发展趋势，并建立了掘进工作面煤壁渗透瓦斯涌出能力的计算模型。通过某矿突出煤层3条典型的掘进巷道发生喷孔与不喷孔现象时煤壁相对渗透性的差异，证明了利用煤壁相对渗透性变化情况反映突出危险的实用性，为利用瓦斯涌出动态特征连续预测工作面突出危险性寻找到新的技术方法。%The percentage of the gas emission from the coal wall of the heading face to the gas emission from the overall heading face and their changes reflected the development status and trend of the relative gas emission in the whole heading face, and a calculation model of gas emission capability from coal wall of the heading face was established. Based on the differences of gas emission from coal wall in the events with and without gas blowout from holes in 3 typical heading roadways in an outburst coal seam,it proved the applicability of using the change of gas emission from coal wall to reflect the outburst hazard,and this thus found out a new technical way of using the dynamic characteristics of gas emission to continuously predict the outburst hazard in the heading face.