茶园煤矿煤层瓦斯含量分布特征及影响因素分析

Distribution Characteristics and Influencing Factors of Gas Content in Coal Seams of Chayuan Coal Mine

针对茶园煤矿瓦斯赋存不明确的问题,基于茶园煤矿勘探资料,对可能影响煤层瓦斯含量分布的矿区地质构造、煤层埋深、煤层顶底板岩性、矿区水文地质条件等因素进行了分析研究。研究表明:茶园煤矿矿区向斜轴部瓦斯含量相对较高;瓦斯含量随着埋深的增加而增大;可采煤层的顶底板封闭性较好,有利于瓦斯的赋存;矿区含煤地层为弱含水层,对瓦斯的逸散起到了阻碍作用;可采煤层为富甲烷煤层,按照突出煤层管理。研究为矿井下一步的瓦斯治理和利用提供了理论依据。

In view of the unclear gas occurrence of Chayuan Coal Mine, based on the drilling sampling collection of Chayuan Coal Mine, this paper analyzed the geological structure, seam depth, rock properties of the roof and the floor, hydrological condition of the mining area and other factors influencing gas occurrence. The research indicates that the gas content in anticline axial of Chayuan Coal Mine is relatively high;it increases with the increasing of burial depth;mineable coal seams are well closed, which is conductive to the gas occurrence;the coal-bearing strata in the mine area are weak water-bearing strata, which hinders the escape of coal gas;the mineable coal seam is a high-content methane coal seam, managed in accordance with the outburst coal seam. The research can provide a theoretical basis for the next step of gas management and utilization in the mine.