Abstract
According to the data of 146 coal samples measured by mercury penetration, coal pores are classified into two levels of <65 nm diffusion pore and >65 nm seeping pore by fractal method based on the characteristics of diffusion, seepage of coal bed methane(CBM) and on the research results of specific pore volume and pore structure. The diffusion pores are further divided into three categories: <8 nm micropore, 8–20 nm transitional pore, and 20–65 nm minipore based on the relationship between increment of specific surface area and diameter of pores, while seepage pores are further divided into three categories: 65–325 nm mesopore, 325–1000 nm transitional pore, and >1000 nm macropore based on the abrupt change in the increment of specific pore volume.
Article PDF
Similar content being viewed by others
Avoid common mistakes on your manuscript.
References
Meyers, R. A., Coal Structure, New York: Academic Press, 1982, 78–83.
Rodrigues, C. F., Lenos, M. J., The measurement of coal porosity with different gases, International Journal of Coal Geology, 2002, 48(3–4): 245–281.
Hodot, B. B., Outburst of Coal and Gas (Chinese Translation), Beijing: China Industry Press, 1966: 27–30.
Gan, H., Nandi, S. P., Lwalker, P., Nature of the porosity in American coals, Fuel, 1972, 51(6): 272–277.
Walker, P. L., Densities, porosities and surface area of coal macerals as measured by their interaction with gases, vapours and liquids. Fuel, 1988, 67(10): 815–823.
Qin Yong, Xu Zhiwei, Zhang Jing, Natural classification of the high-rank coal pore structure and its application, Journal of China Coal Society, 1995, 20(3): 266–271.
Yang Qiluan, Wang Youan, Diffusion theory of gas in coal bed and its application, Journal of China Coal Society, 1986, 11(3): 87–93.
Yang Qiluan, Testing research on gas diffusion rule of coal scraps, Journal of China Coal Mine Security, 1987, (2): 9–16.
Zhou Shining, Sun Jizheng, Flow theory of gas in coal beds and its application, Journal of China Coal Society, 1965, 2(1): 24–37.
Zhou Shining, Application of computer in research of gas flow equations, Journal of China Coal Society, 1983, (2): 29–35.
Zhou Shining, Flow mechanism of gas in coal beds, Journal of China Coal Society, 1990, 15(1): 15–24.
He Xueqiu, Liu Minju, Fracture Electro-magnetic Dynamics of Coal or Rock Containing Gas, Xuzhou: China University of Mining & Technology Press, 1995, 147–151.
Xie Heping, Fractal—Guide of Rock Mechanics, Beijing, Science Press, 1996, 93–123.
Friesen, W. I., Mikule, R. J., Fractal dimensions of Coal Particles, Journal of Colloid and Interface Science, 1987, 20(1): 263–271.
Zhao Aihong, Liao Yi, Tang Xiuyi, Quantitative analysis of coal structure by fractal analysis, Journal of China Coal Society, 1998, 23(4): 439–442.
Zucrow, M. J., Hoffman J., Gas Dynamics (1) (Chinese translation), Beijing: National Defense Industry Press, 1984. 9–11.
Author information
Authors and Affiliations
About this article
Cite this article
Fu, X., Qin, Y., Zhang, W. et al. Fractal classification and natural classification of coal pore structure based on migration of coal bed methane. Chin.Sci.Bull. 50 (Suppl 1), 66–71 (2005). https://doi.org/10.1007/BF03184085
Received:
Issue Date:
DOI: https://doi.org/10.1007/BF03184085