基于后倾斜高抽巷为主体的坚硬顶板综放工作面初采期瓦斯综合治理

Comprehensive gas control in initial mining period of fully mechanized face with hard roof based on rear-inclined high drainage roadway as the main body

通过分析漳村矿2601综放工作面初采期瓦斯骤然异常涌出现象及其变化规律,拟在2603综放工作面采用顶板预裂减少初次来压步距、切眼处打钻贯通后倾斜高抽巷提前抽采瓦斯,以及随瓦斯涌出量的增加而增加供风量等技术措施,消除初采期的骤然瓦斯异常涌出现象,彻底解决综放工作面初采期瓦斯超限的问题。结果表明:基于后倾斜高抽巷为主体的、由顶板预裂、切眼处打钻贯通后倾斜高抽巷及增加风量等所组成的初采期瓦斯治理技术体系,消除了初采期的骤然瓦斯涌出现象,解决了初采期的瓦斯超限问题。

This paper analyzes the sudden abnormal gas outburst and its change during the initial mining period of the 2601 fully mechanized caving face in Zhangcun Coal Mine.It is proposed to use roof pre-cracking in the 2603 fully mechanized caving face to reduce the initial pressure step,and the inclination is high after drilling through the cut hole.Technical measures such as gas drainage in advance and increasing air supply with the increase of gas emission can eliminate the sudden abnormal gas outflow during the initial mining period,and completely solve the problem of gas exceeding the limit during the initial mining period of fully mechanized caving face.The following conclusions are drawn:the gas control technology system in the initial mining period,which is based on the back-inclined high-drainage roadway as the main body,is composed of roof pre-splitting,drilled through the cut hole,and increased air volume in the initial mining period.The sudden gas surge in the early stage solved the problem of gas overrun in the initial mining period.