极近距离煤层瓦斯抽放参数考察

INVESTIGATION ON METHANE DRAINAGE PARAMETERS OF COAL SEAMS WITH VERY SHORT INTERVAL

李子垭煤矿已确定为有煤和瓦斯突出危险矿井，有两个可采煤层，其层间距平均１．１ｍ。矿井瓦斯涌出量达到４１．９ｍ￣３／ｍｉｎ，回采面达到８．０３～１０．８３ｍ￣３／ｍｉｎ，仅用通风的办法不能解决瓦斯问题，为了矿井安全生产的需要，建立矿井瓦斯抽放系统势在必行。通过试抽考察研究，证明在李子垭矿极近距离煤层条件下，采用综合抽放方法可以获得较好的抽放效果，并为合埋设计矿井瓦斯抽放系统提供了必要的设计参数。

Liziya Coal Mine wis classified as a mine with coal and gas outbu-rst hazard.and are two minable seams, which are 1.1 m apart on the average,The outflo w of mine methane reaches 41.9m￣3/min and the outflow of methane from a coal face is up to 8.03-10.8m￣3/min, Such methane problem can't be solved only by ventilation,so it is necessary to set up a mine methane drainage system in order to guarantee the safety in production. The predrainage of seams shows that better results can be obtained with comprehensive drainage for the coal seams with very short intervals in Liziya Coal Mine and this provides essential parameters for the design of mine methane drainage system.