Study on the heat transfer characteristics of mine roadway surrounding rock under periodic airflow temperature: Numerical simulation and experimental validation
Studying the effect of periodic airflow temperature on the heat dissipation of surrounding rock is the basis for revealing the causes of seasonal mine heat damage. In this work, a heat transfer mathematical model of roadway surrounding rock under periodic airflow temperature was established. By vari...
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| Format: | Article |
| Language: | English |
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Elsevier
2025-02-01
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| Series: | Case Studies in Thermal Engineering |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S2214157X24017647 |
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| author | Mingyan Guo Yueping Qin Dongyang Han Fei Tang Shibin Wang Hairong Wang |
| author_facet | Mingyan Guo Yueping Qin Dongyang Han Fei Tang Shibin Wang Hairong Wang |
| author_sort | Mingyan Guo |
| collection | DOAJ |
| description | Studying the effect of periodic airflow temperature on the heat dissipation of surrounding rock is the basis for revealing the causes of seasonal mine heat damage. In this work, a heat transfer mathematical model of roadway surrounding rock under periodic airflow temperature was established. By variable separation method, the model was divided into two parts: annual average component and periodic fluctuation component. Then we discretized the model and designed a solution program independently. Finally, a similar heat transfer experiment platform for roadway surrounding rock was set up and the simulation results were verified. The results show that: (i) The maximum error between the model and the experimental data is less than 3.2 %, which verifies the heat transfer model. (ii) As ventilation time increases, the radius of the cooling ring inside the surrounding rock increases in a negative exponential function trend. The annual average unstable heat transfer coefficient falls quickly, and the decrease speed slows down gradually. (iii) With the increase of depth, the amplitude of temperature fluctuation in surrounding rock decreases rapidly in a negative exponential function trend, and the delay phase increases linearly. (iv) The formula of dimensionless wall heat flux wave of surrounding rock was obtained by fitting. |
| format | Article |
| id | doaj-art-28ef3f0b00b845028fde15730017a1d5 |
| institution | Kabale University |
| issn | 2214-157X |
| language | English |
| publishDate | 2025-02-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Case Studies in Thermal Engineering |
| spelling | doaj-art-28ef3f0b00b845028fde15730017a1d52025-02-02T05:27:18ZengElsevierCase Studies in Thermal Engineering2214-157X2025-02-0166105733Study on the heat transfer characteristics of mine roadway surrounding rock under periodic airflow temperature: Numerical simulation and experimental validationMingyan Guo0Yueping Qin1Dongyang Han2Fei Tang3Shibin Wang4Hairong Wang5School of Emergency Management and Safety Engineering, China University of Mining & Technology, Beijing, Beijing, 100083, PR ChinaSchool of Emergency Management and Safety Engineering, China University of Mining & Technology, Beijing, Beijing, 100083, PR China; Beijing Key Laboratory for Precise Mining of Intergrown Energy and Resources, China University of Mining & Technology, Beijing, Beijing, 100083, PR China; Corresponding author. School of Emergency Management and Safety Engineering, China University of Mining & Technology, Beijing, Beijing, 100083, PR China.School of Emergency Management and Safety Engineering, China University of Mining & Technology, Beijing, Beijing, 100083, PR ChinaSchool of Emergency Management and Safety Engineering, China University of Mining & Technology, Beijing, Beijing, 100083, PR ChinaSchool of Emergency Management and Safety Engineering, China University of Mining & Technology, Beijing, Beijing, 100083, PR ChinaSchool of Emergency Management and Safety Engineering, China University of Mining & Technology, Beijing, Beijing, 100083, PR ChinaStudying the effect of periodic airflow temperature on the heat dissipation of surrounding rock is the basis for revealing the causes of seasonal mine heat damage. In this work, a heat transfer mathematical model of roadway surrounding rock under periodic airflow temperature was established. By variable separation method, the model was divided into two parts: annual average component and periodic fluctuation component. Then we discretized the model and designed a solution program independently. Finally, a similar heat transfer experiment platform for roadway surrounding rock was set up and the simulation results were verified. The results show that: (i) The maximum error between the model and the experimental data is less than 3.2 %, which verifies the heat transfer model. (ii) As ventilation time increases, the radius of the cooling ring inside the surrounding rock increases in a negative exponential function trend. The annual average unstable heat transfer coefficient falls quickly, and the decrease speed slows down gradually. (iii) With the increase of depth, the amplitude of temperature fluctuation in surrounding rock decreases rapidly in a negative exponential function trend, and the delay phase increases linearly. (iv) The formula of dimensionless wall heat flux wave of surrounding rock was obtained by fitting.http://www.sciencedirect.com/science/article/pii/S2214157X24017647Seasonal heat damagePeriodic airflow temperatureHeat transfer modelFinite difference methodSimilar experiment |
| spellingShingle | Mingyan Guo Yueping Qin Dongyang Han Fei Tang Shibin Wang Hairong Wang Study on the heat transfer characteristics of mine roadway surrounding rock under periodic airflow temperature: Numerical simulation and experimental validation Case Studies in Thermal Engineering Seasonal heat damage Periodic airflow temperature Heat transfer model Finite difference method Similar experiment |
| title | Study on the heat transfer characteristics of mine roadway surrounding rock under periodic airflow temperature: Numerical simulation and experimental validation |
| title_full | Study on the heat transfer characteristics of mine roadway surrounding rock under periodic airflow temperature: Numerical simulation and experimental validation |
| title_fullStr | Study on the heat transfer characteristics of mine roadway surrounding rock under periodic airflow temperature: Numerical simulation and experimental validation |
| title_full_unstemmed | Study on the heat transfer characteristics of mine roadway surrounding rock under periodic airflow temperature: Numerical simulation and experimental validation |
| title_short | Study on the heat transfer characteristics of mine roadway surrounding rock under periodic airflow temperature: Numerical simulation and experimental validation |
| title_sort | study on the heat transfer characteristics of mine roadway surrounding rock under periodic airflow temperature numerical simulation and experimental validation |
| topic | Seasonal heat damage Periodic airflow temperature Heat transfer model Finite difference method Similar experiment |
| url | http://www.sciencedirect.com/science/article/pii/S2214157X24017647 |
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