高抽巷层位变化对采空区瓦斯分布规律的影响研究  

Research on the Influence of the Position Change of High Drainage Roadway on the Gas Distribution Law in Goaf

作　　者：李颖 赵东 陈涛[1] LI Ying;ZHAO Dong;CHEN Tao(College of Safety and Emergency Management Engineering,Taiyuan University of Technology,Taiyuan 030024,China;Key Lab of In-situ Property-improving Mining of Ministry of Education,Taiyuan University of Technology,Taiyuan 030024,China)

机构地区：[1]太原理工大学安全与应急管理工程学院,太原030024 [2]太原理工大学原位改性采矿教育部重点实验室,太原030024

出　　处：《太原理工大学学报》2023年第2期313-320,共8页Journal of Taiyuan University of Technology

基　　金：山西省归国留学人员科研基金项目(2022-052)。

摘　　要：为研究高抽巷在采空区瓦斯抽采和上隅角瓦斯治理方面的应用,以及探究高抽巷抽采层位对采空区瓦斯分布规律的影响,以李阳煤矿15302综放工作面为研究对象,运用Fluent数值模拟软件对采空区未抽采和不同层位高抽巷抽采时的瓦斯分布进行模拟,通过对比瓦斯抽采浓度和上隅角瓦斯浓度的数据,分析高抽巷在不同层位的瓦斯抽采效果,将模拟结果与现场实际相结合,设计适合的高抽巷抽采层位方案,并用现场实测数据进行验证。结果表明:高抽巷瓦斯抽采浓度随抽采位置距顶板垂直高度的增加而升高,随着距回风巷水平距离的增加先升高后降低,上隅角瓦斯浓度随垂距和平距的增加均先降低后升高;理论最佳抽采层位为垂距30 m,平距32 m,工作面上隅角瓦斯浓度在0.19%以内,设计抽采层位为垂距40 m,平距35 m,工作面上隅角瓦斯浓度维持在0.63%~0.65%.选取合理的高抽巷抽采层位不仅有利于提高瓦斯抽采效果,而且能有效解决上隅角瓦斯超限的问题。In order to study the application of high drainage roadway in goaf gas extraction and gas control in upper corner, and explore the influence of high drainage roadway extraction position on gas distribution law in goaf. Taking 15302 fully mechanized top coal caving face of Liyang Coal Mine as the research object, the gas distribution was simulated by using Fluent numerical simulation software when the goaf without extracted and when the roadway was extracted at different extraction positions. By compared the data of gas extraction concentration and gas concentration in the upper corner, analyzed the gas extraction effect of high-drainage roadway at different extraction positions. Combining the simulation results with the actual field, designed a suitable high-drainage roadway extraction scheme, and used the field measured data to verify. The results showed that the gas extraction concentration in high drainage roadway increased with the increase of the vertical height between the extraction location and the roof, and increased first and then decreased with the increase of the horizontal distance from the return air roadway. The gas concentration in the upper corner decreased first and then increased with the increase of vertical distance and horizontal distance;The theoretical optimal extraction position was the vertical distance of 30 m, the horizontal distance of 32 m, and the gas concentration at the corners of the working face was within 0.19%. The designed extraction position was 40 m vertical and 35 m horizontal, and the gas concentration at the corners of the working face was maintained at 0.63%~0.65%. Reasonable high drainage roadway extraction position can not only effectively solve the problem of gas over-limit at the corner of the working face, but also help to improve the gas extraction efficiency in the goaf.

关 键 词：高抽巷 采空区 上隅角 抽采层位 数值模拟 

分 类 号：TD712[矿业工程—矿井通风与安全]