Time: 2022-09-10 | Counts: |
CHEN M L, XU Y L, LIU Z J, et al.Study on characteristics of oxidation combustion of long flame coal under axial compression[J].Journal of Henan Polytechnic University(Natural Science) ,2022,41(5):17-23.
doi:10.16186/j.cnki.1673-9787.2020090016
Received:2020/09/04
Revised:2021/03/01
Published:2022/09/25
Study on characteristics of oxidation combustion of long flame coal under
axial compression
CHEN Menglei1,2, XU Yongliang1,3, LIU Zejian1, LYU Zhiguang1, BU Yunchuan1
1.College of Safety Science and Engineering,Henan Polytechnic University,Jiaozuo 454000,Henan,China;2.Guizhou Coal Mine Design Research Institute Co.,Ltd.,Guiyang 550025,Guizhou,China;3.State Key Laboratory Cultivation Base for Gas Geology and Gas Control,Henan Polytechnic University,Jiaozuo 454000,Henan,China
Abstract: To delve into the fire oxidation development mechanism of the shallow buried layer coalfield,effect of CO,oxygen consumption rate and the changing rule of the apparent activation energy of the coal under axial compression,and the load pressure of coal spontaneous combustion characteristic parameters measurement device was used for 2~6 mm diameter pressure heating experiments of coal samples. The results showed that when the axial compression was in 0~4 MPa the coal sample didn’t crack,when axial compression was 6 MPa the coal samples produced small cracks,when axial compression was 8 MPa,the more fractures.When the axial compression was 10 MPa,the produce part of the fracture was compacted. By piecewise linear fitting of oxygen consumption rate,CO production and reciprocal 1/T of coal temperature,it was found that calculated at low temperature could be used as the characteristic temperature of coal oxidation reaction under different coaxial pressure,and at high temperature and low axial pressure could be used as the characteristic temperature of coal oxidation reaction under different coaxial pressure.
Key words:coalfield fire;axial compression;oxygen consumption rate;activation energy;characteristic temperature