摘要
基于麟游区是在鄂尔多斯盆地内新发现的重要赋煤区域之一,区内含煤地层为侏罗系延安组。为了查明麟游区下煤层厚度变化大、分布不均衡的聚煤特征及控制机理,以钻孔资料为基础,采用聚煤过程反演、趋势分析和构造应力分析的方法研究了煤层赋存特征、聚煤规律及其控制机理,并恢复了聚煤基底的原有构造形态。结果表明:区内发育3个富煤单元,从薄煤层到巨厚煤层均有发育,全区煤层总体呈东厚西薄的变化趋势;下煤层底板整体向北西向倾斜且受控于印支运动和燕山运动;煤系及煤层赋存特征主要受古基底构造形态、沉积环境和同沉积构造的控制;三叠系顶面构造形态控制含煤地层沉积和分布,燕山运动前期的同沉积构造控制煤层沉积和分布;燕山运动使含煤地层产状受到一定改变,但对煤层的破坏和改造作用非常微弱。
Linyou Mining Area is one of important new found coal abundance areas in Ordos Basin.Yan'an Formation is the main coalbearing strata.In order to identify the concentrating coal characteristics and its control mechanism with dramatical variation and uneven distribution of lower coal seam thickness in Linyou Area,the coal-seam occurrence characteristics and coal accumulation and its control mechanism of the coal seam had been studied by using the method of coal accumulation inversion and trend analysis and tectonic stress analysis ,based on drilling information.In addition,the original tectonic geometry of coal accumulation basement had been recovered.The results showed that both thin and thick coal seams were deposited following a trend of coal seam thickness gradually increased from east to west and then it forms three coal rich areas.The floor of the lower coal seam was inclined to the NW and controlled by Indo-China Movement and Yanshan Movement.The occurrence characteristics of coal measures and coal seam was determined by basement topography, sedimentary environment and contemporaneous structure.Deposition and distribution of coal measure strata was determined by structural shape of triassic super face.Deposition and distribution of coal seam was controlled by contemporaneous structure in the early Yanshan Movement.The Yanshan Movement had changed the attitude of coal-bearing strata to a certain extent,but had very weak effect on the destruction and transformation of coal seams.
作者
苗霖田
夏玉成
吕婷婷
孙学阳
杜荣军
MIAO Lintian;XIA Yucheng;LYU Tingting;SUN Xueyang;DU Rongjun(College of Geology and Environment ,Xi'an University of Science and Technology,Xi'an 710054,China;Key Laboratory of Coal Resources Exploration and Comprehensive Utilization,Ministry of Land and Resources,Shaanxi Coal Gelology Group Co.,Ltd.,Xi 'an710021,China;Shaanxi Coal Geology Investigation Research Institute Co.,Ltd.,Xi'an 710021,China)
出处
《煤炭科学技术》
CAS
北大核心
2018年第11期163-171,共9页
Coal Science and Technology
基金
国家自然科学基金资助项目(41272388)
国土资源部煤炭资源勘查与综合利用重点实验室开放资助项目(KF2016-02)
关键词
煤层赋存特征
聚煤规律
控煤机理
麟游煤矿区
coal-seam occurrence characteristics
coal accumulating pattern
control mechanism of coal
Linyou Mining Area
