Optimization of the Monitoring of Coal Spontaneous Combustion Degree Using a Distributed Fiber Optic Temperature Measurement System: Field Application and Evaluation

Coal spontaneous combustion (CSC) in gob not only leads to wasted resources and casualties, but also produces a lot of waste gas that pollutes the underground environment. Mastering the degree of CSC helps ensure that timely and effective control measures are taken. The real-time and accurate monito...

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Bibliographic Details
Published in:Fire (Basel, Switzerland) Switzerland), 2023-11, Vol.6 (11), p.410
Main Authors: Zhang, Fengjie, Han, Dongyang, Qin, Yueping, Peng, Shiyang, Zhong, Dawei, Tang, Fei, Xiang, Zhencai, Xu, Hao
Format: Article
Language:English
Subjects:
Accuracy
Cables
Casualties
Chemical properties
Coal
Coal mines
Coal mining
coal spontaneous combustion (CSC)
Combustion
distributed temperature sensing system
Exhaust gases
Fiber optics
gob
Lasers
Light
Observations
online monitoring
Optical fibers
Optimization
Oxidation
protective pipe
Spontaneous combustion
Spraying
Steel cables
Temperature measurement
Thermal properties
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Summary:Coal spontaneous combustion (CSC) in gob not only leads to wasted resources and casualties, but also produces a lot of waste gas that pollutes the underground environment. Mastering the degree of CSC helps ensure that timely and effective control measures are taken. The real-time and accurate monitoring of temperature, as the primary indicator of the extent of CSC, is difficult due to the harsh and hidden environment of gob, resulting in a reduced ability to anticipate and prevent CSC. In this work, a complete distributed optical fiber temperature sensing system (DTSS) set with strong anti-damage ability was developed. The optical cable is protected by internal parallel steel cables and external protective pipes, which greatly improve the system’s reliability and integrity when used in gob. During its application in the Wangyun Coal Mine, an abnormal temperature rise in gob was discovered in time, and the effect of inhibitor spraying was monitored and evaluated. The degree of CSC in the gob was accurately identified, which shows that the work of coal mining can be targeted. This work is expected to improve early warning capability to prevent the risk of CSC in gob, and has promising applications.
ISSN:2571-6255
2571-6255
DOI:10.3390/fire6110410