Open AccessExperimental study on the gas desorption law of lump coal in coal mine goaf
Author(s) -
Linchao Dai
Publication year - 2020
Publication title -
iop conference series. earth and environmental science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.179
H-Index - 26
eISSN - 1755-1307
pISSN - 1755-1315
DOI - 10.1088/1755-1315/558/2/022037
Subject(s) - coal , desorption , coal mining , petroleum engineering , environmental science , gas pressure , exponential function , mining engineering , chemistry , law , geology , adsorption , mathematics , political science , organic chemistry , mathematical analysis
In order to accurately predict the coal mine goaf gas emission and evaluate the goaf gas resources, a self-designed atmospheric pressure coal desorption measurement device was used to conduct a long-term (lasting 140 days) gas desorption rule experiment of goaf lump coal, the effect of lump coal size on gas desorption law was analyzed. The research results show that the desorption rate of lump coals of different sizes (3cm, 5cm, 8cm, 13cm) has a negative exponential function relationship with time. And the cumulative amount of gas desorption basically increases with the increase of lump coal size, the initial gas desorption rate basically increases with the increase of the lump coal size.