China Safety Science Journal ›› 2025, Vol. 35 ›› Issue (5): 39-46.doi: 10.16265/j.cnki.issn1003-3033.2025.05.0987

• Safety engineering technology • Previous Articles     Next Articles

Experimental study on fire flue-gas temperature change flame retardant conveyor belt in full-scale roadway

WANG Yuhuai1(), ZHANG Sijia1, LI Dongming2,**(), HUANG Gang3, ZHANG Wenming4   

  1. 1 School of mine Safety, North China Institute of Science and Technology, Sanhe Hebei 065201, China
    2 School of Safety Engineering, North China Institute of Science and Technology, Sanhe Hebei 065201, China
    3 China Railway 14th Bureau Group Co., Ltd., Jinan Shandong 250000, China
    4 Kailuan (Group) Co., Ltd., Tangshan Hebei 063018, China
  • Received:2024-12-18 Revised:2025-02-20 Online:2025-05-28 Published:2025-11-28
  • Contact: LI Dongming

Abstract:

In order to investigate the variation characteristics of flue-gas temperature at different locations of flame retardant belt during a fire, a fire test was conducted on flame-retardant conveyor belts in a full-scale roadway. First, six temperature measurement sections were arranged along the axial direction in the roadway, and five thermocouples were installed at each section to record the flue-gas temperature at different locations during the combustion process. Then, a fire characteristic test was conducted on a 4 m × 1.2 m (length × width) steel wire rope core flame retardant belt under the condition of wind speed of 1.2 m/s in the full-scale roadway. The experimental results show that the distance from the fire source determines the flue-gas temperature and temperature rise process in the downstream area of the fire source. The closer to the fire source, the stronger the heat effect caused by the combustion of flame retardant tape, and the higher the flue-gas temperature at the corresponding location. Since the tape fire is an unsteady combustion process, and the change in smoke temperature at different sections after a period of time is nonlinear related to the distance from the fire source. In a horizontal roadway at the same height, the flue-gas temperature on both sides of the roadway is higher than that in the middle of the roadway. As the distance from the fire source increases, the temperature difference between the middle and the sides of the roadway gradually decreases. In the longitudinal range of the roadway downstream of the fire source, the flue-gas exhibits a str.pngied state, and the flue-gas temperature decreases gradually from the roof to the floor of the roadway. There is an obvious temperature difference between flue-gas layers at different heights, and the temperature difference between the flue-gas layers decreases gradually with increasing distance from the fire source.

Key words: flame retardant belt, belt fire, flue-gas temperature, full-scale roadway, fire source distance

CLC Number: