低变质煤H_(2)S异常和超限形成机理研究  

Study on the Formation Mechanism of H_(2)S Abnormality and over Limit in Low Metamorphic Coal

作　　者：刘会彬 吴军虎 王晓鹏[1,2] 汪强 彭创[1,2] 陈晓光 LIU Huibin;WU Junhu;WANG Xiaopeng;WANG Qiang;PENG Chuang;CHEN Xiaoguang(ARSC Intelligent Mine Technology Corporation,Xi’an Shaanxi 710199;Aerial Photogrammetry and Remote Sensing Bureau,CNACG,Xi’an Shaanxi 710199)

机构地区：[1]中煤航测遥感集团有限公司智慧矿山分公司,陕西西安710199 [2]中国煤炭地质总局航测遥感局,陕西西安710199

出　　处：《中国煤炭地质》2023年第2期17-21,32,共6页Coal Geology of China

基　　金：陕西省重点研发计划(S2021-YF-ZDCXL-ZDLGY-0100)。

摘　　要：为了研究彬长矿区雅店煤矿的H_(2)S异常和超限的形成机理,通过对矿井主采4号煤层地温条件、不饱和烃、硫酸盐分布、地下水pH值、硫酸盐还原菌(SRB)生存条件及采矿扰动等分析,认为研究区具有20~40℃适宜的地温条件和pH值为7.70~7.78的洛河组弱碱性水良好条件,为硫酸盐还原菌(SRB)苏醒和繁殖提供了生存条件,在硫酸盐还原菌(SRB)的还原作用下,使得煤层中的硫酸盐矿物被还原成为H_(2)S代谢排出(生),进入煤层孔裂隙等储存空间(储),受煤系地层顶底良好的封存作用使得H_(2)S得以保存,受采矿活动的影响,H_(2)S沿裂隙和地下涌水逸散至巷道回风流中(运—逸),造成H_(2)S局部异常和超限,构成了“生—储—保—运(移)—逸”H_(2)S形成机理和条件。To study the formation mechanism of H_(2)S abnormality and over limit in Yadian coal mine in Binchang mining area,the geothermal conditions,unsaturated hydrocarbons,sulfate distribution,groundwater pH value,reducing bacteria(SRB) survival conditions and mining disturbance of No.4 coal seam in the main mining area of the mine were analyzed in depth.The study shows that the study area has suitable ground temperature conditions of 20 ~ 40℃ and good living conditions of weak alkaline water in Luohe Formation with pH value of 7.70 ~ 7.78,which provides conditions for reducing bacteria(SRB) to wake up and reproduce.Under the reduction action of reducing bacteria(SRB),sulfate minerals in the coal seam are reduced into H_(2)S metabolic discharge and enter the storage space(storage) such as coal seam pores and fissures.Due to the good sealing effect of the top and bottom of the coal measure strata,H_(2)S gas is preserved(preserved),and under the influence of mining activities,H_(2)S escapes and gushes out into the tunnel return airflow(transport escape) along the cracks and underground water inflow,causing local abnormality and over limit of H_(2)S,forming the formation mechanism and conditions of “generation storage preservation transport escape” H_(2)S.

关 键 词：H_(2)S异常和超限 硫酸盐还原菌(SRB)生存条件 雅店煤矿 彬长矿区 

分 类 号：TD711[矿业工程—矿井通风与安全]