ABSTRACT
Seasonal variations of air temperature cause seasonal heat-transfer between tunnel airflow and surrounding rocks of coalmine tunnels. This study analyzed the distribution and evolution law of temperature in inhomogeneous surrounding rocks under varying ventilation cycle and airflow amplitude using a self-developed experimental simulation system of inhomogeneous surrounding rocks. The results show that under the periodically changing ventilation, the functional relationship between the temperature of the surrounding rock and ventilation time met the cosine function. The amplitude attenuation and fluctuation delay of temperature waves in surrounding rocks differ across various depths under the condition of periodic ventilation.
Conflicts of Interest
The authors declare that there is no conflict of interest regarding the publication of this paper.
Data Availability
The numerical simulation and field experiment data used to support the findings of this study are included within the article. The authors declare that the data supporting the findings of this study are available within the article.
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Notes on contributors
Zhanyuan Dong
Zhanyuan Dong is a PhD candidate of Emergency Management and Safety Engineering at China University of Mining and Technology (Beijing), born 1991. His research focuses on ventilation and cooling technology in mine, CFD numerical simulation
Yueping Qin
Yueping Qin is a professor of Emergency Management and Safety Engineering at China University of Mining and Technology (Beijing), born 1964. Member of China Coal Society. His research focuses on mine ventilation, mine fire and cooling technology in mine.
Jiansong Wu
Jiansong Wu is an associate professor of Emergency Management and Safety Engineering at China University of Mining and Technology (Beijing), born 1985. Secretary of China Association for Public Safety. His research focuses on risk assessment, cooling technology.
Kaiyuan Guo
Kaiyuan Guo is a Master(CUMTB), born 1990. His research focuses on cooling technology in mine.