综放工作面瓦斯涌出特征实测及分析

结合大阳矿3401综放工作面实际开采条件,通过对支架工作阻力、超前支承压力以及工作面瓦斯浓度等参数进行了实时监测,分析了采场矿压显现及采煤工艺与采场瓦斯涌出之间的关系。结果表明,工作面前方支承压力变化对工作面煤壁瓦斯涌出规律影响较为明显,且采场瓦斯涌出量的峰值通常滞后于周期来压,滞后程度约为1天,采煤生产工序、日产量及推进速度与瓦斯涌出也存在密切的关系。

Measurement and analysis for gas emission characters in fully mechanized caving face

According to the practical condition of 3401 fully mechanized caving face in Dayang mine, the support working resistance, advance abutment pressure and gas concentration of working face are monitored timely. The relationship between strata behaviors, mining technology and stope gas emission is analyzed. It shows that the change of working face abutment pressure has an obvious effect on the regularity of coal face gas emission. The crest value of gas emission falls behind periodic weighting, the lagging is about one day. Many other factors, coal production processes, daily coal output and advance speed, have a close relationship with gas emission.