Coal pore characteristics in different coal mine dynamic disasters

被引:0
|
作者
Jie Zhu
Bo Zhang
Yang Zhang
Jun Tang
Yaodong Jiang
机构
[1] Chongqing University,State Key Laboratory of Coal Mine Disaster Dynamics and Control
[2] China University of Mining and Technology (Beijing),School of Mechanics & Civil Engineering
来源
Arabian Journal of Geosciences | 2018年 / 11卷
关键词
Pore size distribution; Pore compressibility; Mercury intrusion porosimetry (MIP); Liquid nitrogen adsorption (NA);
D O I
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中图分类号
学科分类号
摘要
The pore characteristics of coal have an important influence on the dynamic disaster of coal mine. Considering the disaster caused by large deformation of coal-rock mass, the influence of pore deformation and pore distribution also needs further study simultaneously. In this paper, the pore characteristics of gas outburst coal and bursting liability coal are analyzed and compared. The pore structure, the pore volume, and the pore compressibility associated with different dynamic disasters were comprehensively analyzed. The experimental data of mercury intrusion were corrected by liquid nitrogen adsorption experiment data, and the distribution of pore volume was obtained. Moreover, the fractal dimension of partial micropore was calculated, and the pore compressibility of coal was determined according to the fractal dimension. The results show that there are great differences in the pore characteristics between outburst coal and impact proneness coal, which are also one of the factors leading to different disasters in coal mine.
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