摘要
针对某矿工作面采空区原采用联巷埋管抽采的瓦斯治理技术,存在瓦斯治理效果差,施工成本大等问题。设计以采用低负压、大流量的大直径钻孔抽采替换原联巷埋管抽采技术,首先通过分源预测法计算得到下邻近层的瓦斯涌出量最大,属于重点治理范畴;并通过钻孔和上隅角瓦斯浓度变化规律,确定大直径钻孔孔径650 mm,间距30 m时,能够实现对瓦斯的有效治理。
In response to the gas control technology used in the goaf of a certain mining face,which used to be connected tunnels and buried pipes for gas extraction,there are problems such as poor gas control effect and high construction cost.Design to replace the original buried pipe extraction technology with low negative pressure and large flow rate large-diameter drilling for extraction.Firstly,calculate the maximum gas emission in the adjacent layer through the source separation prediction method,which belongs to the key control category.And by analyzing the variation law of gas concentration in drilling and upper corner,it is determined that effective gas control can be achieved when the large diameter drilling hole diameter is 650 mm and the spacing is 30 m.
作者
车雯涛
Che Wentao(Second Mine,Shanxi Huayang Group New Energy Co.,Ltd.,Yangquan Shanxi 045000,China)
出处
《山西化工》
CAS
2024年第6期210-211,253,共3页
Shanxi Chemical Industry
关键词
大直径钻孔
瓦斯治理
大流量抽采
抽采能力
large diameter drilling
gas control
high flow pumping
extraction capacity
