【摘要】：為了研究煤礦瓦斯中H_2S異常的原因,以阜康礦區(qū)硫化氫異常的烏東井田為主要研究對(duì)象,通過(guò)煤巖、全硫與形態(tài)硫、孔隙特征、水文地球化學(xué)、硫酸鹽還原菌(SRB)富集培養(yǎng)及硫同位素(34S)等測(cè)試分析,研究了煤層硫化氫異常的生物硫酸鹽還原作用(BSR)和硫酸鹽熱化學(xué)還原作用(TSR)的成因。研究結(jié)果表明:H_2S異常礦井煤層水中SO42-離子的濃度低于正常礦井,HCO3-離子濃度高于正常礦井,尤其是HCO3-離子與SO42-離子摩爾濃度百分含量之比(γHCO3-/γSO42-)遠(yuǎn)高于H_2S正常礦井;H_2S異常礦井煤層中全硫含量一般高于0.5%,煤中硫化物硫含量也普遍偏高;H_2S異常礦井煤中大孔、中孔和過(guò)渡孔的比孔容和比表面積偏低,而微孔的比孔容和比表面積要明顯偏高;富集培養(yǎng)了H_2S異常礦井煤層水中硫酸鹽還原菌,分離提純得到了SRB優(yōu)勢(shì)菌落,結(jié)合水源及煤源特征研究證實(shí)了煤礦瓦斯中H_2S異常的生物硫酸鹽還原作用;基于實(shí)測(cè)烏東井田瓦斯中H_2S中δ34S、煤層水中硫酸根離子δ34S、煤層黃鐵礦δ34S,證實(shí)了烏東井田瓦斯中H_2S異常的硫酸鹽熱化學(xué)還原作用。
[Abstract]:In order to study the cause of H _ 2S anomaly in coal mine gas, taking the abnormal hydrogen sulfide in Wudong mine field of Fukang mining area as the main research object, through coal rock, total sulfur and morphological sulfur, pore characteristics, hydrogeochemistry, (SRB) enrichment culture and sulfur isotope (34s) analysis of sulphate reducing bacteria were used to study the causes of abnormal hydrogen sulphide reduction (BSR) and sulphate thermochemical reduction (TSR) in coal seam. The results show that the concentration of SO42- ion in coal seam water of abnormal coal mine is lower than that in normal mine, and the concentration of HCO3- ion is higher than that in normal mine. Especially, the ratio of HCO3- ion to SO42- ion molar concentration (緯 HCO3-/ 緯 SO42-) is much higher than that of H2s normal mine. The total sulfur content in the coal seam with abnormal H2S is generally higher than that in the coal seam, and the sulfide sulfur content in the coal is also generally higher than that in the coal mine. The specific pore volume and specific surface area of the large, mesopore and transition holes are lower, while the specific pore volume and specific surface area of micropore are obviously higher. Sulfate-reducing bacteria in coal seam water of coal seam were enriched and cultured, the dominant colony of SRB was isolated and purified, and the biological sulfate reduction of abnormal H _ 2S in coal mine gas was confirmed by combining the characteristics of water source and coal source. Based on the measurements of 未 34S in gas in Wudong mine field, 未 34S in sulphate ion in coal seam water and 未 34Sin pyrite in coal seam, the sulphate thermochemical reduction of H2S anomaly in gas in Wudong mine field is confirmed.
【學(xué)位授予單位】：中國(guó)礦業(yè)大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2017
【分類(lèi)號(hào)】：TD712

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