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

 轴压作用下长焰煤氧化自燃特性研究_陈蒙磊.pdf