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Two-dimensional inverse problem of fire location in the closed goaf of coal mine based on optical fiber sensors

PloS one, 2024-02, Vol.19 (2), p.e0298329-e0298329 [Peer Reviewed Journal]

Copyright: © 2024 Liu et al. This is an open access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited. ;COPYRIGHT 2024 Public Library of Science ;2024 Liu et al 2024 Liu et al ;ISSN: 1932-6203 ;EISSN: 1932-6203 ;DOI: 10.1371/journal.pone.0298329 ;PMID: 38412183

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Title:
Two-dimensional inverse problem of fire location in the closed goaf of coal mine based on optical fiber sensors
Author: Liu, Yujiao ; Chen, Lu ; Wang, Kaiping ; Liu, Zeyi ; Zhang, Yao ; Shi, Lianzeng ; Gao, Ke ; Yang, Zemiao
Subjects: Analysis ; Coal ; Coal industry ; Coal Mining - methods ; Combustion ; Ecology and Environmental Sciences ; Engineering and Technology ; Equipment and supplies ; Fiber optics ; Fire prevention ; Fires ; Management ; Methods ; Mineral industry ; Mining industry ; Occupational health and safety ; Optical Fibers ; Physical Sciences ; Research and Analysis Methods ; Safety and security measures ; Spontaneous Combustion
Is Part Of: PloS one, 2024-02, Vol.19 (2), p.e0298329-e0298329
Description: Monitoring the temperature to determine the fire source locations is essential for controlling the spontaneous combustion in the goaf. Optical fiber sensors are employed to measure the temperature distribution in the goaf. However, due to changes in the geological conditions and the influence of the falling rocks in the goaf, only sensors on the upper side of the uncompacted goaf, due to inclination and coal pillar, may remain. Unilateral sensors are located on the upper side of the goaf, while fire occurs in the center. To investigate the issue with linear unilateral sensors, a two-dimensional inverse method has been developed to determine the location of fire sources by considering heat transfer after a fire inside the goaf. The equations were theoretically solved using Green's function method to obtain the internal temperature distribution of the physical model of the goaf. Sensitivity analysis identified the most crucial parameters in the process of spontaneous heating at different temperature. The fire source location can be determined using a loop method based on the model calculations. We considered a case to validate the model. Accurately identifying the fire source location in the goaf using the unilateral sensors has an essential theoretical and practical significance for fire prevention and fighting.
Publisher: United States: Public Library of Science
Language: English
Identifier: ISSN: 1932-6203
EISSN: 1932-6203
DOI: 10.1371/journal.pone.0298329
PMID: 38412183
Source: GFMER Free Medical Journals
MEDLINE
PubMed Central
Public Library of Science (PLoS)
ProQuest Central
DOAJ Directory of Open Access Journals

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Two-dimensional inverse problem of fire location in the closed goaf of coal mine based on optical fiber sensors

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