Study on the formation of hydrogen sulfide in coal mines of southeastern margin of Junggar basin based on the characteristics of spring (well)water
DENG Qigen
WEN Jiejie
LIU Mingju
WANG Yan
Abstract：The enrichment abnormal of hydrogen sulfide (H2S) in the coal-bearing stratum of the southeastmargin of Junggar basin,occurred many casualties.The characteristics of chemical and microbial activity of groundwater can sensitively reflect the change of information in the crust.Based on the characteristics of spring (well) water in the study regions,this paper discussed the origin of hydrogen sulfide in coal mines,which is of great significance to identify the source,occurrence and control of hydrogen sulfide gas in coal bearing strata and the exploitation of coalbed methane and hydrocarbon.The gas composition in coal bed mainly are N2 and CH4,components H2S,CO2 and heavy hydrocarbon,the highest content of H2S in the gas is 2.11％.The chemistry type of stratigraphic water along flow direction changed from HCO3-Ca-Na and HCO3-SO4-Na-Ca into HCO3-SO4-Cl-Na-K.The salinity,hardness and pH value of water gradually become high,which is saltwater of alkalescence.The spring (well)water outcropping in the coal bearing strata,which rich in CH4,N2,CO2,H2S,H2 and some heavy hydrocarbons,et al.The content of methane and water temperature in the spring of No.4 have been downward trend,while the content of H2S,CO2 and SO42-remained stable upward trend.The δ13C values of carbon in water generally from-1.81％ to-1.12％,has the characteristics of little.The number of sulfate reducing bacteria (SRB) up to 3 500 (A/g sample) detected in mine groundwater,which direct the SRB breed intense.About 4.35％ clone have relation with the anaerobic oxidation of methane in the No.10 spring,in addition,SRB within the anaerobic sulfur environment from habitat in the deep strata (coal bearing strata)in water also was detected.The conclusions indicate that the water body is in anaerobic condition,the propagation of microorganisms in the spring water is closely related to the sulfur compounds.Both above have the characteristic of BSR.While the coal forming environment and coal and rock burned are not enrichment of large-scale H2S.So that,the formation of H2S is in a close connection with the BSR in the later stage.
Keywords：southeastern margin of Junggar basinspring (well) waterhydrogen sulfide in coal minesformation
Publication Date：2018-01-01
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：7( 8-14 )