高瓦斯综放工作面超前支承压力与瓦斯涌出关系分析

Relationship Analysis between Lead Abutment Pressure and Gas Emission in High Gas and Fully-Mechanized Coal Face

工作面前方煤体内的瓦斯涌出量是整个工作面瓦斯涌出的重要组成部分。煤体内的瓦斯压力变化直接影响着瓦斯渗流速度,而工作面前方煤体的瓦斯压力变化又受煤体应力的影响,因此工作面超前支承压力与前方煤体瓦斯涌出存在着一定关系。对工作面前方煤体内瓦斯涌出与超前支承压力的关系进行了监测,通过监测结果进行分析并结合数值模拟,对超前支承压力与瓦斯涌出量的变化关系进行了分析。

Gas emission of coal body in front of working face is an important part of the gas emission amount in the whole face.Gas pressure change of coal body has a direct impact on the gas seepage velocity,and the gas pressure changes of coal body in front of working face is influenced by the coal stress.Therefore,there is a certain relationship between face lead abutment pressure and coal gas emission.The paper monitored the relationship between the gas emission of coal body in front of working face and lead abutment pressure.Through the analysis of the monitoring results and numerical simulation,the change relation between lead abutment pressure and coal gas emission amount is analyzed.