Study on the influence of flow field on evolution law of temperature distribution in goaf

QIN Tong; GUO Chaowei; SHAO Hao; SUN Yaohui

doi:10.13347/j.cnki.mkaq.20240459

Safety in Coal Mines > 2024 > 55(9): 110-117. > DOI: 10.13347/j.cnki.mkaq.20240459

QIN Tong, GUO Chaowei, SHAO Hao, et al. Study on the influence of flow field on evolution law of temperature distribution in goaf[J]. Safety in Coal Mines, 2024, 55（9）: 110−117. DOI: 10.13347/j.cnki.mkaq.20240459

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Study on the influence of flow field on evolution law of temperature distribution in goaf

1.
Department of Resources and Mechanical Engineering, Lyuliang University, Lyuliang 033001, China
2.
College of Environment and Safety Engineering, North University of China, Taiyuan 030051, China
3.
College of Safety Engineering, China University of Mining and Technology, Xuzhou 221116, China

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Received Date: April 06, 2024
Revised Date: June 05, 2024

Graphical Abstract

Abstract

Abstract

Accurately grasping the distribution and evolution law of coal spontaneous combustion temperature in goaf is a prerequisite for improving the prevention and control effect of coal spontaneous combustion. Taking the 15103 working face of Wenzhuang Coal Mine as the prototype, a similar experimental platform for heterogeneous goaf was established to explore the evolution law of temperature distribution in goaf under different flow field conditions, and the influence of different wind speed and unsteady wind flow conditions on the evolution of temperature distribution in goaf was analyzed. The results show that both porosity and wind flow have a certain influence on the temperature distribution, and the temperature distribution will be biased towards the large porosity area and the downwind area of the wind flow. Under the condition of unsteady flow field, the high temperature area of goaf will expand, resulting in the increase of coal spontaneous combustion danger area. The migration phenomenon of high temperature area and high temperature point under the action of airflow was found, and the migration principle was revealed.
- coal spontaneous combustion,
- flow field,
- temperature distribution,
- high-temperature area,
- unsteady-state wind flow,
- goaf

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References (16)

References

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Study on the influence of flow field on evolution law of temperature distribution in goaf