煤与瓦斯突出矿井回采工作面偏Y型通风效果的影响因素分析

Affecting factors of ventilation effect of Y-shaped working face with coal and gas outburst

以保安煤矿突出矿井为例,进行了回采工作面沿空留巷偏Y型通风试验,对偏Y型通风时工作面通风及瓦斯抽采情况进行了分析。结果表明,采用偏Y型“两进一回”通风方式时,沿空留巷段内的瓦斯浓度在0.48%~0.66%;随着沿空留巷长度的增加,沿空留巷内的瓦斯浓度随之增加,沿空留巷内的风量逐渐减少,回风顺槽风量逐渐增加,采空区瓦斯抽采量逐渐升高。这一研究对于回采工作面沿空留巷通风方式合理布置具有指导意义。

Bao’an Mine with gas outburst was taken as an example,a partial Y-type ventilation test was carried out at the recovery mining working face along the gob side entry,and the ventilation and gas extraction of the working face were analyzed during the partial Y-type ventilation.The results showed that the gas concentration in the section was 0.48%~0.66%with the ventilation method of“one-in-two-back”;with the increase of the length of the gob-side entry,the gas concentration increased,the air volume gradually decreased,the air volume in the return wind roadway gradually increased,and the gas extraction volume in the extraction area gradually increased.This study exerted significance for the reasonable arrangement of the ventilation method along the air-holding roadway at the recovery working face.