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H2S是一种剧毒、有害性气体,乌鲁木齐西山井田是我国最早发现煤层瓦斯中H2S异常的井田之一。为了新建矿井煤炭资源开采安全,基于煤田地质勘查和矿井开拓成果,分析了影响原位煤层中H2S含量的因素,探讨了H2S异常的成因。研究结果表明:1)在煤田勘探范围内(埋深浅于600m),实测H2S含量与煤层埋深、煤层瓦斯总含量、CH4、CO2、N2含量、水分含量(Mad)、灰分产率(Ad)呈负相关趋势,与全硫含量(St,d)、挥发分产率(Vdaf)呈正相关趋势;2)H2S异常的主要成因为煤层自燃、BSR、TDS、TSR混合成因及地下水的迁移。
H2S is a kind of toxic and harmful gas. Urumqi Xishan Minefield is one of the earliest discovered coal mine H2S anomalies in China. In order to mine safety of coal resources in new mines, the factors influencing the content of H2S in coal seams are analyzed based on the results of coalfield geological prospecting and mine development, and the causes of H2S anomalies are discussed. The results show that: 1) The content of H2S and the depth of coal seam, the total gas content of coal seam, the content of CH4, CO2, N2, the content of moisture (Mad), the ash yield (Ad) (St, d) and Vdaf. (2) The main causes of H2S anomalies are spontaneous combustion of coal seam, formation of BSR, TDS and TSR and groundwater migration.