文献类型：期刊文献

英文题名：Pore Characteristics and Fractal Dimension Analysis of Tectonic Coal and Primary-Structure Coal: A Case Study of Sanjia Coal Mine in Northern Guizhou

作者：Lin, Huaying Tian, Shixiang Jiao, Anjun Cao, Zuoyong Song, Kai Zou, Yihuai

第一作者：Lin, Huaying

通信作者：Tian, SX[1];Tian, SX[2]

机构：[1]Guizhou Univ, Coll Min Engn, Guiyang 550025, Guizhou, Peoples R China;[2]Inst Min Engn, Guizhou Inst Technol, Guiyang 550000, Guizhou, Peoples R China;[3]Guizhou Adm Coal Safety, Guiyang 550000, Guizhou, Peoples R China;[4]Guizhou Univ, Natl Joint Engn Lab Utilizat Dominant Mineral Reso, Guiyang 550025, Guizhou, Peoples R China

第一机构：Guizhou Univ, Coll Min Engn, Guiyang 550025, Guizhou, Peoples R China

通信机构：corresponding author), Guizhou Univ, Coll Min Engn, Guiyang 550025, Guizhou, Peoples R China;corresponding author), Guizhou Univ, Natl Joint Engn Lab Utilizat Dominant Mineral Reso, Guiyang 550025, Guizhou, Peoples R China.

年份：2022

卷号：7

期号：31

起止页码：27300-27311

外文期刊名：ACS OMEGA

收录：;Scopus(收录号：2-s2.0-85135885207);WOS:【SCI-EXPANDED(收录号:WOS:000886733500001)】；

基金：Funding This work was supported by the National Natural Science Foundation of China under Grant number 52104079 and by theGuizhou Provincial Science and Technology Projects under Grant number [2020] 4Y050.

语种：英文

摘要：Understanding the pore heterogeneity of tectonic coal and primary-structure coal is of great significance for predicting and preventing tectonic coal. This study adopts the low-temperature nitrogen adsorption method, mercury injection experiment, and other methods, combined with fractal theory, to quantitatively analyze the pore distribution of coal samples inside and outside the outburst cavities of the Sanjia coal mine. The experiments have shown that the contents of aliphatic functional groups and hydrogen in tectonic coal are higher than those of aromatic structural functional groups. Raw coal has more straight chains than side chains, whereas aliphatic hydrocarbon mostly has short chains, and the branching degree is high. Soft and primary-structure coals have similar elemental content and tectonic effects endow the coal with better connectivity. The pores are filled with particles and flakes, and the surfaces of tectonic coal have more pores and fissures on them. According to the experimental curve, the pores are divided into five types. The pore size of primary-structure coal is mainly type II pores, and the pore size distribution of tectonic coal is relatively wide, with the majority being class I and class II pores. The specific surface area of tectonic coal is 60.7% more than that of primary-structure coal. The box fractal dimension of coal decreases with the increase in scanning electron microscopy (SEM) magnification. The minimum fractal dimension of tectonic coal is 2.49, which is 7.8% lower than the peak of 2.70. It can be seen from the fractal dimension that the fractal dimensions of pore types II, III, and IV are rougher.