王家岭煤矿工作面上隅角瓦斯治理的技术研究

摘要

After experimental parameter test and field observation , the paper analyzed the characteristics of gas occurrence and emission:The content of coal seam gas is low with poor gas permeability and long gas re-leasing time.Combining with characteristics of exploitation scheme and roadway layout , the reason why gas exceeding the limit in mining face in the upper corner is that adopting "U"type ventilation system lead to re-circulation zone in the upper corner and gas accumulation too much in the goaf .According to the theoretical a-nalysis and field observation , we came up with "U set U"type instead of the "U"type ventilation system to solve the problem above and gained good results .%通过实验参数测试和现场观测，分析了王家岭煤矿瓦斯赋存和涌出特点：煤层瓦斯含量低，煤层透气性差，瓦斯释放时间长。结合王家岭煤矿开拓开采方法和巷道布置特点，确认矿井回采工作面上隅角瓦斯超限是由于采用“U”型通风系统，上隅角存在回流区，采空区积累大量瓦斯。根据理论分析和现场观测，提出了用“U套U”型通风系统代替“U”型通风系统的处理措施，取得了良好效果。