期刊
INTERNATIONAL JOURNAL OF OIL GAS AND COAL TECHNOLOGY
卷 13, 期 3, 页码 305-320出版社
INDERSCIENCE ENTERPRISES LTD
DOI: 10.1504/IJOGCT.2016.079259
关键词
water inrush; gas; pore structure; adsorption characteristics; seepage characteristics
资金
- National Natural Science Foundation of China [51304189]
- National Basic Research Program of China (973 Program) [2011CB201200]
- Priority Academic Program Development of Jiangsu Higher Education Institutions
Frequent coal mine flooding is bound to impact not only the stope stress effects of working face, but also the absorption and seepage characteristics of coal mass. In this paper, we examined the effects of long-term water inrush on coal pore structure as well as gas adsorption and seepage characteristics using water-flooded Taoyuan Coal Mine, Anhui Province, China, as an example. Results showed that: 1) after water inrush, the volume, area, and porosity of coal samples, as well as the proportion of micro-pores decreased significantly with the distance from the water inrush site increasing; 2) the amount of gas adsorption of coal samples near the water inrush site was higher than that away from the site; 3) within 13 m from the site, the seepage capacity of coal gas increased; 4) the water seeped into the coal dissolves a mass of inorganic minerals and organic matter and carries them away.
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