Shaanxi Yongming Coal Mine Co.

为研究薄煤层沿空留巷瓦斯分布规律及控制技术,以永明煤矿3116工作面为研究对象建立数值模型,模拟得出永明煤矿3116工作面瓦斯浓度分布基本符合规律,回风巷瓦斯浓度未超限。为防止永明煤矿3121工作面可能会出现的气压变化以及回风隅角瓦斯异常涌出的情况,提出了采用合理控风、减少留巷段滞后距离以及回风隅角瓦斯抽放相结合的技术手段来控制隅角瓦斯浓度。

In order to study the gas distribution law and control technology of gob-side entry retaining in thin coal seam, a numerical model is established with the 3116 working face of Yongming Coal Mine as the research object. The simulation results show that the gas concentration in the 3116 working face of Yongming Coal Mine basically conforms to the law, and the gas concentration in the return air way does not exceed the limit. In order to prevent the possible air pressure change and abnormal gas emission at the return airway corner of the 3121 working face in Yongming Coal Mine, the technical means of reasonable air control, reducing the lag distance of the reserved roadway section and gas drainage at the return airway corner are proposed to control the gas concentration at the corner.

1 建立数值计算模型及方案
2 沿空留巷隅角瓦斯分布规律
2.1 实际情况下的瓦斯浓度三维分布特征
2.2 较大瓦斯释放量下瓦斯浓度三维分布特征
2.3 留巷情况下的瓦斯浓度三维分布特征
3 隅角瓦斯控制技术
3.1 合理通风控制隅角瓦斯
3.2 回风隅角抽放瓦斯
4 结论

刘元龙,李文强,马培言.薄煤层沿空留巷瓦斯分布规律及控制技术研究[J].山东煤炭科技,2023,41(06):88-91.