Experimental research and application of high pressure spray cooling in long distance coal mining face

JI Zhaoyang; CHEN Xiujie; FENG Qian; ZHANG Yiran; MIAO Dejun

doi:10.13347/j.cnki.mkaq.20231466

Safety in Coal Mines > 2024 > 55(10): 72-81. > DOI: 10.13347/j.cnki.mkaq.20231466

JI Zhaoyang, CHEN Xiujie, FENG Qian, et al. Experimental research and application of high pressure spray cooling in long distance coal mining face[J]. Safety in Coal Mines, 2024, 55（10）: 72−81. DOI: 10.13347/j.cnki.mkaq.20231466

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Experimental research and application of high pressure spray cooling in long distance coal mining face

JI Zhaoyang^1,,
CHEN Xiujie^{2, 3},
FENG Qian^{2, 3},
ZHANG Yiran^{2, 3},
MIAO Dejun^{2, 3, ,}

1.
Yuanzigou Coal Mine, Shaanxi Linbei Coal Industry Development Limited Liability Company, Baoji 721000, China
2.
College of Safety and Environmental Engineering, Shandong University of Science and Technology, Qingdao 266590, China
3.
State Key Laboratory of Strata Intelligent Control and Green Mining Co-founded by Shandong Province and the Ministry of Science and Technology, Shandong University of Science and Technology, Qingdao 266590, China

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Received Date: October 12, 2023
Revised Date: November 23, 2023

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Abstract

Abstract

For the problem of high temperature heat damage at 1012102 working face in Yuanzigou Mine, the best spray pressure and nozzle atomization parameters are determined by using the method of spray cooling experiment. The numerical simulation method is used to simulate and analyze the influence of different spray temperature and spray spacing conditions on the cooling effect, and the comfort of human body before and after spray is used to analyze by the linear regression method. The results show that: when the spraying system in the synthesized mining face adopts the group spacing of 10 m, the water temperature is 286 K, and the pressure is 6 MPa, the single group peak temperature reaches 1.3 ℃ compared with the conventional ventilation method. After the application in the field, the temperature of most areas on the sidewalk side of the working face was lower than 26 ℃, the maximum temperature dropped to below 27 ℃, the minimum temperature was as low as 24.7 ℃, which effectively realized the regional cool.
- high-temperature coal mining face,
- spray cooling,
- numerical simulation,
- spraying system,
- heat damage management

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References

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