摘要
为得到综放工作面在有无密闭墙情况下采空区漏风规律及其周边环境气体变化情况,通过对石港矿15108综放工作面现场调研,利用FLUENT软件进行数值模拟,结果表明:构筑泡沫密闭墙前采空区O2浓度由进风侧逐渐降低,构筑密闭墙后在内错尾巷与采空区连通口两侧存在浓度梯度,中心附近O2浓度较高;构筑密闭墙前后采空区内部CH4分布规律基本一致,由浅到深CH4浓度存在梯度,越往深部CH4浓度越高,为采空区封堵漏风和防灭火治理提供了依据。
In order to obtain the air leakage law of the goaf in the face of the fully mechanized caving face with or without the closed wall and the change of the ambient gas in the surrounding area, the field investigation of the 15108 fully mechanized caving face of Shigang mine was carried out, and the numerical simulation was carried out by using FLUENT software. The concentration of O2 in the goaf before the construction of the foam sealing wall is gradually reduced from the inlet side. After constructing the closed wall, there is a concentration gradient on both sides of the communication junction between the inner and the tailings, and the concentration of O2 near the center is higher;before and after the construction of the closed wall the distribution of CH4 in the goaf is basically the same. There is a gradient from shallow to deep CH4 concentration. The higher the CH4 concentration in the deeper part, the basis for sealing the air leakage and preventing fire prevention in the goaf.
作者
赵杰
ZHAO Jie(Yangquan Coal Industry Group Co.,Ltd.,Yangquan 045000,China)
出处
《煤炭技术》
CAS
2019年第10期181-183,共3页
Coal Technology
基金
阳泉2017年科技项目(GY17007)
关键词
综放采空区
漏风规律
数值模拟
fully mechanized caving face
air leakage law
numerical simulation
