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陕北侏罗纪煤田三角洲平原沉积环境及其岩石力学特征

王海军 马良

王海军, 马良. 陕北侏罗纪煤田三角洲平原沉积环境及其岩石力学特征[J]. 煤田地质与勘探, 2019, 47(3): 61-69. doi: 10.3969/j.issn.1001-1986.2019.03.011
引用本文: 王海军, 马良. 陕北侏罗纪煤田三角洲平原沉积环境及其岩石力学特征[J]. 煤田地质与勘探, 2019, 47(3): 61-69. doi: 10.3969/j.issn.1001-1986.2019.03.011
WANG Haijun, MA Liang. Study on sediment environment and rock mechanics characteristics of the delta plain of Jurassic coalfield in northern Shaanxi[J]. COAL GEOLOGY & EXPLORATION, 2019, 47(3): 61-69. doi: 10.3969/j.issn.1001-1986.2019.03.011
Citation: WANG Haijun, MA Liang. Study on sediment environment and rock mechanics characteristics of the delta plain of Jurassic coalfield in northern Shaanxi[J]. COAL GEOLOGY & EXPLORATION, 2019, 47(3): 61-69. doi: 10.3969/j.issn.1001-1986.2019.03.011

陕北侏罗纪煤田三角洲平原沉积环境及其岩石力学特征

doi: 10.3969/j.issn.1001-1986.2019.03.011
基金项目: 

中煤科工集团西安研究院有限公司科技创新基金项目(2013XAYQN002);国家科技重大专项任务(2016ZX05045-002-001)

详细信息
    第一作者:

    王海军,1985年生,男,陕西榆林人,助理研究员,从事煤田地质勘探工作.E-mail:wanghaijun10000@163.com

  • 中图分类号: P642.3

Study on sediment environment and rock mechanics characteristics of the delta plain of Jurassic coalfield in northern Shaanxi

Funds: 

Science and Technology Innovation Fund of Xi'an Research Institute of CCTEG(2013XAYQN002)

  • 摘要: 三角洲平原沉积环境是陕北侏罗纪煤田煤炭资源的主要形成环境之一,为获得不同环境煤层顶板岩石力学参数特征,进一步探究沉积环境与岩石力学特征之间的关系,首先从区域沉积环境分析入手,然后运用岩心精细描述、沉积构造分析、地球物理测井分析等技术,识别微相、划分顶板沉积微相类型及其组合特征;之后对不同沉积环境中不同位置、不同岩性的岩石进行系统地分层采样和测试分析;最后综合分析煤层顶板各沉积微相的岩石力学特征。结果表明,煤层直接顶板以泥岩、粉砂质泥岩为主,形成于三角洲平原亚相中的沼泽、湖泊沉积微相,局部见粉砂岩、细粒砂岩形成于分流河道和天然堤微相;基本顶主要以中-细粒砂岩为主,形成于分流河道沉积微相;沉积环境不仅控制煤层顶板岩性分布而且控制岩石力学参数及其含水层富水性的分布,其中,湖泊、沼泽相泥岩顶板区是顶板支护的重点部位,多期分流河道砂岩叠置顶板区是未来矿井防治水以及探放水的重点区域。

     

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出版历程
  • 收稿日期:  2018-05-30
  • 刊出日期:  2019-06-25

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