Microstructure Characteristics of Tectonic Coal and Primary Coal: A Case Study of Guizhou, China

被引:11
|
作者
Feng, Cong [1 ,3 ]
Li, Xijian [1 ,2 ,3 ]
Xu, Enyu [1 ,3 ]
Sui, Hao [2 ]
Xue, Feng [1 ,3 ]
Xie, Honggao [1 ,3 ]
机构
[1] Guizhou Univ, Coll Min, Guiyang 550025, Peoples R China
[2] Guizhou Univ, Coll Resource & Environm Engn, Guiyang 550025, Peoples R China
[3] Guizhou Engn Ctr Safe Min Technol, Guiyang 550025, Peoples R China
基金
美国国家科学基金会;
关键词
Tectonic coal; Pore structure; Fractal dimension; Multifractal; Primary structure coal; PORE STRUCTURE CHARACTERIZATION; FRACTAL CHARACTERISTICS; ADSORPTION; NMR;
D O I
10.1007/s11053-023-10274-5
中图分类号
P [天文学、地球科学];
学科分类号
07 ;
摘要
The pore structure of coal has a great influence on the exploitation of coalbed methane. The primary coal and tectonic coal of the Faer Coal Mine and Wenjiaba Coal Mine in Guizhou, China, were selected for low-temperature liquid nitrogen and high-pressure mercury injection experiments. Based on the Frenkel-Halsey-Hill fractal model and multifractal model, combined with nano-CT system, the difference between primary structural coal and tectonic coal and their relationships with fractal dimension were analyzed. According to the results, coal can increase its pore volume and surface area by tectonic action. From the perspective of pore volume and surface area, micropores occupy the main part. According to the pore volume and pore surface area of micropores, that of primary structural coal was lower than that of tectonic coal. For the studied coal samples, their pores have fractal characteristics and complex structure. It can be seen from the fractional dimension that that of tectonic coal was higher than that of primary structure coal, indicating that the microscopic pore structure of coal tends to be complex after tectonic action. According to the results of multifractal and nano-CT analysis, the Hausdorff dimension of tectonic coal was slightly smaller than that of primary structure coal, but the multifractal parameter value was higher than that of primary structure coal. After tectonic action, the connected pores of coal increased by 142.86% compared with the connected pores of primary coal, and the adsorption capacity was further improved. It is further proved that the structure can affect the adsorption and desorption capacity by changing the distribution of pore structure.
引用
收藏
页码:2901 / 2926
页数:26
相关论文
共 50 条
  • [1] Microstructure Characteristics of Tectonic Coal and Primary Coal: A Case Study of Guizhou, China
    Cong Feng
    Xijian Li
    Enyu Xu
    Hao Sui
    Feng Xue
    Honggao Xie
    Natural Resources Research, 2023, 32 : 2901 - 2926
  • [2] Pore Characteristics and Fractal Dimension Analysis of Tectonic Coal and Primary-Structure Coal: A Case Study of Sanjia Coal Mine in Northern Guizhou
    Lin, Huaying
    Tian, Shixiang
    Jiao, Anjun
    Cao, Zuoyong
    Song, Kai
    Zou, Yihuai
    ACS OMEGA, 2022, 7 (31): : 27300 - 27311
  • [3] Pore Characteristics and Fractal Dimension Analysis of Tectonic Coal and Primary Structure Coal: A Case Study of Sanjia Coal Mine in Northern Guizhou (vol 7, pg 27300, 2022)
    Lin, Huaying
    Tian, Shixiang
    Jiao, Anjun
    Cao, Zuoyong
    Song, Kai
    Zou, Yihuai
    ACS OMEGA, 2022,
  • [4] Study on pore structure characteristics of tectonic coal in Qinglong Coal Mine in Western Guizhou based on mercury injection
    Zhao J.
    Wang M.
    Ma R.
    Bake A.
    Gao X.
    Meitan Kexue Jishu/Coal Science and Technology (Peking), 2022, 50 (10): : 159 - 168
  • [5] THE COAL OCCURRENCE TECTONIC UNITS AND COAL CONTROLLING CHARACTERISTICS in NORTHWEST CHINA
    Ning Shuzheng
    Cao Daiyong
    Chen Limin
    2013 INTERNATIONAL CONFERENCE ON MACHINERY, MATERIALS SCIENCE AND ENERGY ENGINEERING, 2013, 318 : 482 - 485
  • [6] Evolution Characteristics of the Microstructure with Different Fracturing Fluids: An Experimental Study of Guizhou Bituminous Coal
    Li, Liangwei
    Sun, Haitao
    Wu, Wenbin
    Zuo, Shaojie
    Sun, Peng
    ACS OMEGA, 2023, 8 (32): : 29803 - 29811
  • [7] Study on the washability of the Kaitai coal, Guizhou Province China
    Zhang, Qin
    Tian, Yingzhong
    Qiu, Yueqin
    Cao, Jianxin
    Xiao, Tiancun
    FUEL PROCESSING TECHNOLOGY, 2011, 92 (03) : 692 - 698
  • [8] Coal Facies and Its Effects on Pore Characteristics of the Late Permian Longtan Coal, Western Guizhou, China
    Lou, Yi
    Su, Yuliang
    Wang, Wendong
    Xia, Peng
    Wang, Ke
    Xiong, Wei
    Yu, Yin
    Shao, Linjie
    Yang, Fuqin
    Chen, Xiangping
    GEOFLUIDS, 2022, 2022
  • [9] Characteristics of water contamination in abandoned coal mines: a case study on Yudong River area, Kaili, Guizhou Province, China
    Li, Xiangdong
    Cai, Jieying
    Chen, Di
    Feng, Qiyan
    INTERNATIONAL JOURNAL OF COAL SCIENCE & TECHNOLOGY, 2021, 8 (06) : 1491 - 1503
  • [10] Characteristics of water contamination in abandoned coal mines: a case study on Yudong River area, Kaili, Guizhou Province, China
    Xiangdong Li
    Jieying Cai
    Di Chen
    Qiyan Feng
    International Journal of Coal Science & Technology, 2021, 8 : 1491 - 1503