Deep mining results in an increasingly serious hazard. Based on the principle of heat transfer and radiant cooling, a three-dimensional heat transfer model of the working face was established. The influence of the inlet airflow parameter, the surrounding wall temperature and other parameters on the temperature distribution of airflow along the working face were analyzed under the radiation cooling mode. The results show that the increment of airflow temperature in several sections along the working face decreases by 0.67 °C, 0.48 °C, 0.40 °C, 0.36 °C, 0.33 °C, 0.29 °C respectively. The farther away from the airflow inlet, the more obvious the cooling effect was. The airflow temperature of the working face is positively correlated with the airflow inlet temperature and the surrounding wall temperature, and is negatively correlated with the airflow velocity. The research provides a good solution for the working face cooling of deep mines, and also provides a theoretical reference for the research on the radiation cooling technology of the working face.

A phase-change material was added to filling materials in an appropriate proportion to realize the effective collection and storage of geothermal energy. Based on the theory of heat transfer and similarity, the heat-storage performance of filling body was numerically simulated in different states; then, the influences of paraffin proportion, initial temperature of filling body, surrounding rock temperature, stope airflow temperature and velocity on the heat-storage behavior of filling body were analyzed. The results revealed that reducing the initial heat-storage temperature of filling body, increasing surrounding rock temperature and increasing the airflow temperature in the stope all effectively increased the heat-storage capacity of filling body; in which the influence of initial temperature and surrounding rock temperature were more significant. at the end of 16 h heat-storage period, when the initial temperature of filling body was reduced from 24?C to 18?C, the heat transfer capacity of filling body without paraffin and that with 5 % paraffin decreased by 2.85 ? 103 kJ and 2.40 ? 103 kJ, respectively. When surrounding rock temperature increased from 35?C to 45?C, the amount of heat stored by two bodies increased by 3.89 ? 103 kJ and 4.51 ? 103 kJ, respectively.

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