LIU D B, HAN Y.“Three Zones” division of spontaneous combustion in goaf of inclined coal seam and countermeasures for fire fighting[J].Journal of Henan Polytechnic University(Natural Science) ,2023,42(3):27-33.

doi:10.16186/j.cnki.1673-9787.2021100041

Received:2021/10/18

Revised:2022/03/22

Published:2023/05/25

“Three Zones” division of spontaneous combustion in goaf of inclined coal seam and countermeasures for fire fighting

LIU Debao1, HAN Ying1,2,3,4

1.School of Energy Science and Engineering，Henan Polytechnic University，Jiaozuo  454000，Henan，China;2.Henan Province Collaborative Innovation Center of Coalbed Methane and Shale Gas for Central Plains Economic Region，Henan Polytechnic University，Jiaozuo  454000，Henan，China;3.Technology Platform of Deep Mine Strata Control and Methane Drainage for State Administration of Work Safety，Henan Polytechnic University，Jiaozuo  454000，Henan，China;4.State Key Laboratory Cultivation Base for Gas Geology and Gas Control，Henan Polytechnic University，Jiaozuo  454000，Henan，China

Abstract:No.8+10 coal seams belonged to Ruilong Coal Industry are in danger of spontaneous ignition.In order to accurately determine the location of the spontaneous combustion zone of the 8115 working face to provide a target for the adoption of fire-fighting measures，taking the oxygen concentration as the dividing index，the beam tube extraction method was adopted to carry out the on-site measurement of the spontaneous combustion“Three Zones”in the goaf.The numerical model of mined-out area was constructed and solved by FLUENT software，and the distribution law of oxygen mass in mined-out area was obtained.Based on this，the“Three Zones”of spontaneous combustion were divided，and the width of the spontaneous combustion zone was determined.What’s more，the fire prevention measures were put forward.Studies showed that the heat dissipation zone of the goaf of the 8115 working face was 0~51.2 m.The spontaneous combustion zone was 51.2~86.2 m，and the width was 35 m.The suffocation zone was greater than 86.2 m.It was recommended to use buried pipe nitrogen injection or inter-frame pipe intubation to prevent fire extinguishing by vapor spraying，and to control the spontaneous combustion zone in the goaf.

Key words:inclined coal seam;goaf;“Three Zones”of spontaneous combustion;oxygen concentration;numerical simulation

倾斜煤层采空区自燃“三带”划分及防灭火措施_刘德宝.pdf