摘要
为了解决综放工作面高位钻孔易塌孔、抽采流量低的问题,以赵庄二号井2307工作面为背景,通过分析目前高位钻孔布置参数和存在问题,结合多个工作面开采参数和矿压数据,确定高位钻孔布置参数。高位钻孔终孔位置在煤层顶板上部23~32 m之间,水平方向距回风巷8~35 m之间时,钻孔瓦斯抽放效果较好,降低了上隅角瓦斯浓度。
In order to solve the problems of high-level borehole collapse and low extraction flow in fully mechanized top coal caving face,taking the 2307 working face of Zhaozhuang No.2 Well as the background,through analyzing the current high-level borehole layout parameters and existing problems,combined with mining parameters and strata pressure data of multiple working faces,the high-level borehole layout parameters are determined.When the final hole position of the high-level borehole is between 23-32 m above the coal seam roof and between 8-35 m from the return air roadway in the horizontal direction,the gas drainage effect of the borehole is better and the gas concentration in the upper corner is reduced.
作者
李河清
史建
侯建龙
Li Heqing;Shi Jian;Hou Jianlong(Zhaozhuang No.2 Well of Jinneng Holding Coal Group,Shanxi Changzhi 046600)
出处
《山东煤炭科技》
2021年第7期119-121,125,共4页
Shandong Coal Science and Technology
关键词
瓦斯抽采
高位钻孔
终孔位置
上隅角瓦斯
gas drainage
high level drilling
location of terminal hole
upper corner gas
