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金能煤业公司以2#煤层作为3#煤层的保护层。在开采2#煤层3122工作面时,由于保护层与被保护层间距较近,在保护层工作面开采时,下覆被保护层的瓦斯大量涌入上保护层工作面,造成回采期间瓦斯涌出量增大。针对此情况,结合3122工作面实际条件,学用顺层与穿层抽放、采空区埋管抽放、高位钻孔抽放和地面钻井抽放相结合的瓦斯治理技术,有效地解决了近距离保护层工作面的瓦斯超限问题,对相似条件下的工作面瓦斯治理具有借鉴作用。
Jinneng Coal Mining Company 2 # 3 # coal seam as a protective layer. During the mining of 3122 face of seam 2 #, because of the close spacing between the protective layer and the protected layer, a large amount of gas underneath the protective layer influx the protective layer during the mining of the protective face, resulting in gas pumped during the recovery Increased output. In view of this situation, combined with the actual conditions of 3122 face, learn to use the layer and the stratum drainage, gob drainage, high drilling drainage and surface drainage combination of gas treatment technology to effectively solve the The problem of gas overrun in the working face with close distance protective layer can be used as a reference for gas control in face under similar conditions.