利用浮力富集乏风瓦斯的可行性研究  

Study on feasibility of ventilation air methane accumulation in coal mine by buoyant force

作　　者：王世贤[1] 乔继延[2] 陈力[2] 穆春明 邢天亮[3] 丁雁生[2] 

机构地区：[1]郑煤集团告成煤矿,河南省登封市452470 [2]中国科学院力学研究所,北京市海淀区100190 [3]郑煤集团技术中心,河南省郑州市450042

出　　处：《中国煤炭》2012年第6期104-106,111,共4页China Coal

摘　　要：对于开采低渗透难抽采煤层的高瓦斯矿井,因抽采浓度低而难以利用,现场有利用浮力富集乏风中瓦斯的设想,本文研究其可行性。现场试验表明,瓦斯浓度沿着高度方向差别很小,不存在实际意义上的富集。理论分析认为,离析态的瓦斯在浮力作用下可能产生积聚,但积聚不是瓦斯富集而是稀释;气体自发的扩散和通风,使风流中的瓦斯由离析态迅速转变为非离析态,非离析态瓦斯在重力场中的分离程度可以忽略不计。Due to low suction concentration, it is difficult to utilize the methane in coal mine with low permeability and high methane concentration. An idea of methane accumulation by buoyant force was planned to be applied to the coal mine, so its feasibility was discussed in this paper. It was proved that the methane was difficult to enrich because of little difference in methane concentration in the vertical direction. Theoretically, segregated methane possibly accumulated by buoyant force, however, it was not methane enrichment but dilution. Owing to the diffusion and ventilation, the methane changed fast from isolation to non-isolation state, while the segregating degree of non-segregation methane was negligible in the gravity field.

关 键 词：瓦斯 乏风瓦斯 浮力富集 瓦斯富集 扩散 通风 离析态 非离析态 

分 类 号：TD712.51[矿业工程—矿井通风与安全]