A thermal environment prediction method for a mine ventilation roadway based on a numerical method: A case study

作者：Yu Xu, Zijun Li, Gang Li, Saeid Jalilinasrabady, Xiaowei Zhai, Yin Chen, Bing Wang · 发表于：Case Studies in Thermal Engineering · 年份：2023 · DOI：10.1016/j.csite.2023.102733 · 被引用次数：43 · 研究领域：Coal Properties and Utilization、Rock Mechanics and Modeling、Geothermal Energy Systems and Applications

Thermal environment prediction has become increasingly significant in recent years with its promise of wide application in underground structures. The current work presents a numerical method for the feasible and effective analysis of the airflow and surrounding rock temperatures in ultralong mine ventilation roadways to understand their dynamic heat transfer. To reduce the modeling effort and computation time with satisfactory accuracy, the ventilation roadway is approximated as a one-dimensional (1D) line element. Still, the surrounding rock of the roadway remains three-dimensional (3D). An equivalent heat transfer coefficient calculates the dynamic heat transfer in the radial direction of the roadway. A case analysis of the Sanhejian coal mine ventilation roadways in China is performed, and a comparison between the simulated results and field measurements indicates that the predicted airflow temperature shows good agreement. The change in the underground thermal environment concerning ventilation time is systematically investigated in detail. The surrounding rock of the roadway adjusts the underground thermal environment through heat absorption or heat release, and the temperature distribution of the surrounding rock presents a "V" shape in winter and a "W" shape in summer. The self-compression of air contributes to a remarkable heat source for the increase in airflow temperature in the air intake shaft. A roadway with a low initial temperature of the surrounding rock afte...