汾西中兴煤业1207保护层工作面初采初放瓦斯治理研究

Study on the management of initial mining and pre-release gas at 1207 protected seam working face in Fenxi Zhongxing Coal Industry

汾西中兴煤业保护层采煤工作面在初采初落时瓦斯涌出量大,采用U型的通风方式解决工作面瓦斯超限问题,确保工作面正常生产。随着工作面的向前推进,老顶的悬顶面积越来越大,达到一定跨度时,老顶会突然冒落,压出大量瓦斯,容易引起瓦斯超限和瓦斯事故。本文介绍了汾西中兴煤业1207保护层工作面采用本煤层顺层钻孔、上隅角埋管抽放、高抽巷和顶板走向高位裂隙带定向长钻孔抽采技术,圆满地解决了初放期间的顶板管理和瓦斯问题,取得了较好的安全效益。

Fenxi Zhongxing Coal Industry coal mining face with largest gas gush during the initial mining and initial fall,and uses the U-shaped ventilation was adopted to solve the problem of gas overrun at the working face to ensure normal production at the working face.As the working face advancing,the overhanging roof area of the old roof became larger and larger,and when it reached a certain span,the old roof will suddenly bubble down and press out a large amount of gas,which will easily cause gas overrun and gas accidents.Fenxi Zhongxing Coal 1207 protective seam working face adopted this coal seam down-seam drilling,upper corner buried pipe extraction,high extraction roadway and roof towards high fissure zone directional long drilling extraction technology,which successfully solved the roof management and gas problems during the initial release and achieved better safety benefits.