彬长矿区低煤级烟煤H2S赋存条件及成因类型  

H2S occurrence conditions and genetic types of low rank bituminous coal in Binchang mining area

作　　者：刘会彬 何万盈 姜波[2] LIU Huibin;HE Wanying;JIANG Bo(Bin County Coal Co.Ltd.,Xianyang 712000,China;School of Resources and Geosciences,China University of Mining and Technology,Xuzhou 221116,China)

机构地区：[1]彬县煤炭有限责任公司,陕西咸阳712000 [2]中国矿业大学资源与地球科学学院,江苏徐州221116

出　　处：《煤田地质与勘探》2020年第5期26-33,共8页Coal Geology & Exploration

基　　金：国家自然科学基金重点项目(41430317)。

摘　　要：彬长矿区北部雅店煤矿主采4号煤层,建矿期间H2S含量最高达到0.0014%左右,回采期间经常发生H2S超限问题,结合研究区地质特征,分析认为,煤层顶底板致密围岩的封盖作用,导水裂隙带无法导通上覆含水层,煤的变质程度较低不利于H2S吸附等,是导致研究区H2S异常超限的主要因素。通过对4号煤层原煤中硫的分布、硫酸盐类型、地下水、地温和不饱和烃等分析,认为研究区H2S形成的条件是:30~40℃的地温适宜硫酸盐还原菌(SRB)繁殖,硫酸盐提供了物质基础,C2-C8不饱和烃提供了能量和物质条件,弱碱性地下水为其提供了生存环境,适宜H2S气体硫酸盐生物还原(BSR)作用的发生,判断该矿H2S气体为BSR成因。通过优化通风、喷浆封堵、加强排水及喷洒碱性等措施,可有效防治H2S超限,保证了工人健康与矿井安全。Based on the analysis of geological characteristics of the study area,it is considered that the geological conditions of H2S occurrence are the capping effect of dense surrounding rock on the roof and floor,the water-conducting fractured zone is unable to guide the overlying aquifer,and the low degree of coal metamorphism is not conducive to H2S adsorption,resulting in maximum H2S concentration of about 0.0014%in the main mined coal seam 4 during the construction of Yadian mine at the north of Binchang mining area.Through the analysis of sulfur distribution,sulfate type,groundwater,ground temperature and unsaturated hydrocarbons in the raw coal of No.4 coal seam,it is considered that the formation conditions of H2S in the study area are as follows:the ground temperature of 30-40℃was suitable for the reproduction of SRB,sulfate provided the material basis,C2-C8 unsaturated hydrocarbon provided the energy and material conditions,weak alkaline ground water provided the living environment and BSR was easy to occur.It is judged that the H2S gas in the mine is caused by BSR type.By optimizing ventilation,grouting and plugging,strengthening drainage and spraying alkalinity and other measures,the H2S overrun is effectively prevented,and the health of workers and mine safety are guaranteed.

关 键 词：彬长矿区 低煤级烟煤 H2S赋存条件 H2S成因类型 硫酸盐生物还原(BSR)成因 

分 类 号：TD711[矿业工程—矿井通风与安全]