低瓦斯矿井高产高效工作面瓦斯地面抽采技术

Coalbed Methane Surface Drainage Technology of High Output and Efficiency Working Face of Low Methane Coal Mine

为保障塔山煤矿安全高效开采,基于对工作面瓦斯来源、涌出特点及矿压规律的研究,表明塔山煤矿为低瓦斯矿井,但工作面绝对瓦斯涌出量随煤炭产量的增加而增加,为典型的高强度开采条件下瓦斯涌出矿井。根据"O"形圈理论、采矿"上三带"理论及矿压规律,创新提出一种低瓦斯矿井高产高效工作面瓦斯地面抽采技术,即施工地面垂直采动井组解决回风巷、上隅角及采空区瓦斯治理问题。结果表明:该技术使得回风巷瓦斯浓度降低至0.8%以下,上隅角瓦斯浓度降低至0.4%以下,同时实现了对采空区瓦斯的有效抽采。

To ensure high output and efficiency mining of Tashan coal mine,based on characters of working face methane and pressure principle,Tashan coal mine is low methane mine,but absolute methane emission of working face increased with coal production increased,so it is typical methane emission coal mine under high intensity mining.According ‘O’circle theory,‘upper three belts’theory and pressure principle,and then coalbed methane surface drainage technology of high output and efficiency working face of low methane coal mine was put forward,gas control and prevention of air return way,upper corner and gob methane control could be solved by surface vertical mining well group.The results showed that methane concentration of air return roadway and upper corner reduced below 0.8% and 0.4%,and also gob methane effectively drainage was realized.