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关于煤系石墨鉴定标准的讨论

曹代勇 王路 朱文卿 吴国强 魏迎春 宁树正 王桂香 肖金成 徐祥 刘亢

曹代勇,王路,朱文卿,等. 关于煤系石墨鉴定标准的讨论[J]. 煤田地质与勘探,2022,50(12):105−113. doi: 10.12363/issn.1001-1986.22.07.0527
引用本文: 曹代勇,王路,朱文卿,等. 关于煤系石墨鉴定标准的讨论[J]. 煤田地质与勘探,2022,50(12):105−113. doi: 10.12363/issn.1001-1986.22.07.0527
CAO Daiyong,WANG Lu,ZHU Wenqing,et al. Discussion on identification standard of coal-measure graphite[J]. Coal Geology & Exploration,2022,50(12):105−113. doi: 10.12363/issn.1001-1986.22.07.0527
Citation: CAO Daiyong,WANG Lu,ZHU Wenqing,et al. Discussion on identification standard of coal-measure graphite[J]. Coal Geology & Exploration,2022,50(12):105−113. doi: 10.12363/issn.1001-1986.22.07.0527

关于煤系石墨鉴定标准的讨论

doi: 10.12363/issn.1001-1986.22.07.0527
基金项目: 国家自然科学基金项目(42072197,41772156),湖南省自然资源科研(标准)项目(2021B03);国家能源局能源行业标准制定计划项目(20210092)
详细信息
    第一作者:

    曹代勇,1955年生,男,重庆人,博士,教授,博士生导师,从事盆地构造和矿产地质研究. E-mail:cdy@cumtb.edu.cn

  • 中图分类号: TD985;P619.25+2;P618.11

Discussion on identification standard of coal-measure graphite

  • 摘要: 煤系石墨的鉴别及其类型划分,是矿产地质勘查和资源开发利用的前提条件和基础性工作,制定煤系石墨鉴定标准应遵循科学性、系统性、适用性和可操作性的原则。煤石墨化作用与煤化作用是连续递进加跃变的演化过程,煤系石墨的大分子结构阶跃性演化和物质组成非均质性等特点,造成矿种鉴别的复杂性。为制定科学实用的鉴定标准,从成矿机制研究和资源评价需求出发,按照矿石总体石墨化程度由高至低,划分了煤系石墨一号、二号、三号等3种类型;在前期工作的基础上,补充了110多组实测数据,修改完善了由初步鉴定指标和精确鉴定指标构成的煤系石墨鉴定指标体系。初步鉴定指标包括挥发分产率Vdaf和最大反射率Rmax,用于资源评价和地质勘查阶段初步区分煤与煤系石墨;精确鉴定指标包括晶面间距d002及其等效的石墨化度G、拉曼光谱参数R2,用以精确鉴别煤与煤系石墨,并划分煤系石墨类型。基于涵盖我国主要煤系石墨矿山500余组样品实测数据统计分析结果,确定了煤系石墨类型划分指标:煤系石墨一号,0.335 4 nm≤d002<0.338 0 nm(G>0.70)、R2<0.50;煤系石墨二号,0.338 0 nm≤d002<0.340 0 nm(G>0.50~0.70)、R2值范围0.50~0.60;煤系石墨三号,0.340 0 nm≤d002<0.344 0 nm(G>0~0.50),R2值范围0.50~0.60。根据上述指标,建立了煤系石墨鉴定模板,主要煤系石墨矿山样品测试数据表明,该鉴定模版具有实用性和可操作性。

     

  • 图  煤变质作用阶段划分与大分子结构演化[17]

    注:LaLc分别为基本结构单元的延展度和堆砌度。

    Fig. 1  Stage division of coal metamorphism and evolution of macromolecular structure [17]

    图  我国煤系石墨成矿区带划分及采样点分布

    Fig. 2  Metallogenic belts division of coal-measure graphite in China and distribution of sampling points

    图  煤系石墨实测数据统计分析结果

    Fig. 3  Statistical analysis results of measured data of coal-measure graphite

    图  煤系石墨类型鉴定分类模板

    Fig. 4  Identification and classification template of coal-measure graphite

    表  1  煤系石墨测试分析方法

    Table  1  Testing and analysis methods of coal-measure graphite

    大类方法
    成分分析(1) 光学显微镜观察:石墨组分鉴别
    (2) 工业分析:固定碳、挥发分
    (3) 元素分析:C、H
    结构分析(1) 反射率测试
    (2) X射线衍射分析
    (3) 激光拉曼光谱分析
    (4) 扫描电镜
    (5) 透射电镜
    物化性质分析电学性质、热分析、密度、孔隙率、机械
    性质等
    下载: 导出CSV

    表  2  煤系石墨鉴定指标

    Table  2  Identification index of coal-measure graphite

    类型初步鉴定指标精确鉴定指标
    Vdaf/%Rmax/%d002/nm石墨化度GR2
    煤系
    石墨
    一号<5.0>6.0<0.3380~0.3354>0.70<0.50
    二号<0.3400~0.3380>0.50~0.700.50~0.60
    三号<0.3440~0.3400>0~0.50
    ≥0.3440≤0>0.60
      注:① G=(0.3440 nm−d002)/(0.3440 nm−0.3354 nm);② R2=AD1/(AD1AD2AG),其中AD1AD2AG分别为D1、D2和G峰面积。
    下载: 导出CSV
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  • 收稿日期:  2022-07-04
  • 修回日期:  2022-09-13
  • 录用日期:  2022-12-25
  • 刊出日期:  2022-12-25
  • 网络出版日期:  2022-10-29

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