掘进巷道停风后瓦斯浓度分布规律探讨

Discussion on gas density distribution law after ventilation fan stopped in mine excavation roadway

在巷道掘进中 ,因检修、停电等原因停风造成瓦斯积聚 ,巷道内的瓦斯浓度随时间推延沿巷道径向分布不均匀。利用质量守恒定律 ,分析并从理论上推导出不同时期沿巷道径向瓦斯浓度的分布规律 ,其研究结果有助于掘进巷道瓦斯的排放 ,有利于在掘进巷道瓦斯爆炸事故的调查中 ,为分析爆炸事故瓦斯的积聚原因提供了理论支持。

During an excavation of mine roadway, ventilation stopped due to the maintenance or electric power shut off could cause gas accumulation in the mine roadway and the gas content in the mine roadway will be distributed unevenly along the mine roadway with the time passed. With the quality constant law, the paper analyzed and calculated the gas content distribution law along the mine roadway with the time passed from the theory. The research results will be favorable to the gas drainage from the mine roadway and favorable to the investigation of a gas explosion occurred in the mine roadway. The results also will be a theoretical support to analysis the gas accumulation causes of a gas explosion.