【摘要】 针对潘三1542(3)高瓦斯缓倾斜煤层综采工作面瓦斯涌出量大、回风流瓦斯超限的现实条件,分析了工作面瓦斯来源及其比例,查明工作面上行通风时瓦斯治理效果差的原因;研究并实施下行通风方式,及时调整工作面风量,配合顶板高位走向钻孔抽采瓦斯措施,提高了瓦斯治理效果,消除了工作面风流瓦斯超限,实现了工作面的安全高产高效。更多还原

【Abstract】 As an example of 1542(3) comprehensive mechanized coal working face with high gas content,this paper analysized the gas emission source and their emission proportion,determined the cause of bad gas control by upwards ventilation mode.In order to get better gas control effect,downwards ventilation was adopted and the long-drill dranage method along the strike of annular fracture areas was also applied.Therefore,the phenemon of gas concenfrate overrate in the airflow was eliminated,safety and high efficiency production of working face had been realized.更多还原