轩岗矿区2号煤层工作面顶抽巷层位优化研究
RESEARCH ON OPTIMIZING THE LAYER OF TOP EXTRACTION ROADWAY IN XUANGANG MINING AREA NO.2 COAL WORKING FACE
尹鹏飞 1李杰 2刘思迪2
作者信息
- 1. 晋能控股煤业集团轩岗煤电有限责任公司刘家梁煤矿,忻州 034000
- 2. 中煤科工集团沈阳研究院有限公司,抚顺 113122
- 折叠
摘要
基于轩岗矿区相邻矿井工作面瓦斯治理效果迥异的现状,以轩岗矿区2号煤层不同层位顶抽巷为研究对象,提出了利用SF6示踪技术对顶抽巷与工作面风流导通性、抽采源进行定性辨识,利用UDEC软件模拟得出采空区上覆岩层变形的相关参数并依据"O"形圈理论,编写相应的围岩冒落控制程序,采用fluent仿真软件对顶抽巷布置层位不同的两个采空区模型进行瓦斯抽采模拟验证.结果表明低层位顶抽巷存在抽采新鲜风流现象,高层位顶抽巷存在抽采影响范围偏小未能覆盖切顶线后部的现象.研究结果得出:SF6示踪技术能够准确、直观地对顶抽巷抽采气体来源进行辨识,数值仿真技术能够便捷佐证测定结果的可靠性,为示踪技术在抽采源辨识中的应用提供技术支持.顶抽巷沿距离2号煤层顶板10 m布置时,垮落带与工作面直接导通而抽采新鲜风流,顶抽巷层位沿距离顶板20 m布置时,处于两带交界处,瓦斯抽采效果明显优于层位10 m处.
Abstract
Based on the current situation of different gas treatment effects of adjacent mine faces in Xuangang Mining area,this paper takes the top pumping roadway of different strata No.2 coal seam in Xuangang Mining area as the research object,and proposes to use SF6 tracer technology to conduct qualitative tests on the air conductivity of the top pumping roadway and the working face and the pumping range.The relevant parameters of overlying strata deformation in goaf were simulated using UDEC software,and the corresponding surrounding rock caving control program was written according to the"O"ring theory.The fluent simulation software was used to simulate and verify the gas extraction of two goaf models with different layout levels in the top pumping roadway.The results show that there is a phenomenon of fresh air pumping in the lower level top pumping roadway.There is a phenomenon that the suction influence range is too small to cover the back of the cutting top line.The conclusion show that SF6 tracer technology can accurately and intuitively determine the source of gas extracted from the top pumping lane,and numerical simulation technology can easily prove the reliability of the measurement results,providing technical support for the application of tracer technology in the identification of pumping source,when the top pumping roadway is arranged 10m away from the roof of No.2 coal seam,the caving zone and the working face are directly connected and fresh air is extracted.When the top pumping roadway is arranged 20m away from the roof,the gas extraction effect is obviously better than that of the top pumping 10 m.
关键词
瓦斯抽采/示踪技术/数值仿真/抽采源辨识/布置层位Key words
gas extraction/tracer technology/numerical simulation/extraction source identification/layout horizon引用本文复制引用
出版年
2024
NETL
NSTL
万方数据