巴拉素煤矿2号富水煤层水理性质分析  

Analysis on hydrologic properties of No.2 water-rich coal seam in Balasu Coal Mine

作　　者：方刚 Fang Gang(Xi′an Research Institute(Group),China Coal Technology and Engineering Group,Xi′an 710054,China;Shaanxi Key Laboratory of Preventing and Controlling Technology for Coal Mine Water Hazard,Xi′an 710077,China;School of Geology and Environment,Xi′an University of Science and Technology,Xi′an 710054,China)

机构地区：[1]中煤科工西安研究院(集团)有限公司,陕西西安710054 [2]陕西省煤矿水害防治技术重点实验室,陕西西安710077 [3]西安科技大学地质与环境学院,陕西西安710054

出　　处：《能源与环保》2023年第9期96-101,共6页CHINA ENERGY AND ENVIRONMENTAL PROTECTION

基　　金：国家自然科学基金资助项目(42307113);陕西省自然科学基础研究计划资助项目(2023-JC-QN-0291)。

摘　　要：陕北侏罗纪煤田榆横北区的巴拉素煤矿2号煤层水害严重威胁矿井安全。以区内巴拉素煤矿2号富水煤层为研究对象,阐明了2号煤层水的赋存、运移形式。结合其他非富水煤层,即巴拉素煤矿3号煤层、大海则煤矿2号煤层,利用采样实验、数据分析等方法,通过对比研究水理性质,总结了各煤层的容水度、透水性、给水度和持水度特征。研究结果表明,巴拉素煤矿2号煤层水赋存于煤层内部发育的孔隙、裂隙中,随煤层起伏变化由高向低流动运移,并趋于稳定状态;在外部因素影响作用下,大量煤层水瞬间涌出。对比各煤层水理性质的主要参数,巴拉素煤矿2号煤层容水度比其他煤层大30%~50%,渗透系数是其他煤层的近2倍,给水度比其他煤层大30%~40%,而持水度小40%~60%。由此认为,巴拉素煤矿2号煤层具有良好的内部空间和通道,有利于地下水的存储和运移,且其煤层内部结合水含量少、重力水含量多,更有利于水体的释放流出,而其他煤层则不具备该条件。研究成果可为区内2号煤层富水机理研究提供理论依据。Water disaster of No.2 coal seam of Balasu Coal Mine in Yuheng mining area(northern)of Jurassic coalfield in northern Shaanxi seriously threatens mine safety.Taking the No.2 water-rich coal seam in Balasu Coal Mine as the main research object,the form of water occurrence and migration in the No.2 coal seam was clarified.Combined with other non-water-rich coal seams,namely No.3 coal seam in Balasu Coal Mine and No.2 coal seam in Dahaize Coal Mine,according to sampling experiment,data analysis and other methods,through the comparative study of water properties,this paper summed up the water capacity,water permeability,water supply and water retention characteristics of each coal seam.The resulted show that the No.2 coal seam water in Balasu Coal Mine existed in the pores and cracks developed inside the coal seam,and migrated from high to low with the fluctuation of the coal seam,and tends to be stable.Under the influence of external factors,a large amount of coal seam water gushed out instantly.By comparing the main parameters of the water properties of various coal seams,the water capacity of No.2 coal seam in Balasu Coal Mine was 30%~50%larger than that of other coal seams.The permeability coefficient was nearly 2 times that of other coal seams.The water supply ratio was 30%~40%higher than other coal seams.And the water retention deficiency was reduced by nearly 40%~60%.Therefore,it is considered that the No.2 coal seam in Balasu Coal Mine has good internal space and channel,which is conducive to the storage and migration of groundwater.Moreover,the content of bound water in the coal seam is less and the content of gravity water is more conducive to the release and outflow of water bodies,while other coal seams do not have such conditions.The research results can provide theoretical basis for the study of water-rich mechanism of No.2 coal seam in the study area.

关 键 词：榆横北区 富水煤层 赋存运移形式 水理性质 巴拉素煤矿 

分 类 号：TD741[矿业工程—矿井通风与安全]