无煤柱、小煤柱开采防治回采工作面瓦斯爆炸

Prevention of Gas Explosion at Working Face by Pillarless and Small-Pillar Mining

近期笔者研究发现坪湖矿小煤柱工作面采空区聚集的高浓度瓦斯就有煤柱开采而言另辟蹊径,由于其比空气轻,再加上回风道上帮6m的小煤柱扛不住工作面开采产生的支撑压力而裂隙多多,瓦斯通过诸多裂隙遁往上部工作面老塘,而不会再回到原工作面,这是无煤柱、小煤柱开采防止工作面瓦斯爆炸的机理。

The author makes a study on the mechanism of gas explosion prevention at working face with high-concentration gas by pillarless and small-pillar mining,in which gas can escape from the gaps produced because of the intolerable supporting pressure for the pillar at 6 m rise-side of air-return way to the upper old working face.