陕北三叠纪煤田子长矿区贯屯井田瓦窑堡地层沉积环境分析  

Analysis of sedimentary environment of Wayaopu strata in Guantun mine field of Triassic coal field Zichang mining area in Northern Shaanxi

作　　者：宋景 王璐 褚俊洁 SONG Jing;WANG Lu;CHU Junjie(Shaanxi 194 Coalfield Geology Co.,Ltd.,Tongchuan 727000,China;Sangshuping Coal Mine No.2 Mine,Shaanxi Shanmei Hancheng Mining Co.,Ltd.,Weinan 715400,China)

机构地区：[1]陕西省一九四煤田地质有限公司,陕西铜川727000 [2]陕西陕煤韩城矿业有限公司桑树坪二号井,陕西渭南715400

出　　处：《陕西煤炭》2023年第1期125-128,144,共5页Shaanxi Coal

摘　　要：贯屯井田位于子长矿区的中部,构造形态与子长矿区一致。井田内先后经过找煤、普详查、勘探等地质勘查工作,获得大量的地质资料,瓦窑堡地层为该区的含煤地层,自下而上分为5个含煤段,含煤层(煤线)30余层,最多34层(10-7号钻孔),具对比意义的煤层6层,含煤层依次为1、2、3^(-1)、3、4、5、6号煤层,其中3、4、5号煤为可采煤层,1、2、3^(-1)、6号煤为不可采煤层;通过对区内128个钻孔资料分析,选择典型勘探线选择个别钻孔,应用沉积相剖面法、井田三叠纪地层顶面等高线图、富县组地层岩性、厚度数据统计。分析认为,井田在三叠纪晚期-早侏罗纪受古构造影响,地层不均匀抬升,瓦窑堡地层受大范围的冲刷剥蚀,使井田西部区内主采5号煤层缺失;研究瓦窑堡地层沉积环境分析对井田煤层对比及后期工作面接续布置具有借鉴意义。Guantun mine field system is located in the middle of the Zichang Mining area, and its structure is consistent with that of the Zichang mining area.After geological exploration work such as coal search, general survey and exploration, a large number of geological data have been obtained in the mine field.The Wayaobao formation is a coal-bearing formation in the area, which is divided into five coal-bearing sections from bottom to top and more than 30 coal-bearing strata(coal line),up to 34 layers(No.10~No.7 drilling hole),6 layers of coal seam with contrast significance, the coal-bearing layers are 1,2,3^(-1),3,4,5 and 6 coal seams in sequence, among which 3,4,5 coal seams are mining coal seams, 1,2,3-1and 6 coal seams are non-mining coal seams;Based on the analysis of the data of 128 drilling holes in the area and the selection of individual drilling holes for typical exploration lines, the authors consider that, by applying the sedimentary facies section method, the contour map of the top surface of triassic strata in mine field system, and the statistical analysis of the lithology and thickness of the Fuxian formation, under the influence of Palaeostructure, the strata in mine field system were inhomogeneously uplifted from late triassic to early Jurassic, and the Wayaobao strata were eroded in a large scale, which resulted in the loss of the main coal seam No.5 in western mine field system.The study on the sedimentary environment of Wayaobao strata is of great significance to the correlation of coal seams in mine field system and the layout of working face in late stage.

关 键 词：含煤地层 瓦窑堡组 沉积相对比 冲涮剥蚀 

分 类 号：TD163[矿业工程—矿山地质测量]