Computer simulation study on heat transfer of surrounding rock in mine roadway of coal mine enterprises

Abstract

The thesis theory combined with computer simulation, according to the thermal theory, the heat transfer process of the surrounding rock in the coal mine roadway is simplified into an unstable state process, and the influencing factors of the unstable heat transfer coefficient of the surrounding rock are found, and the computer experimental system is used as the basis. At the same time, the paper constructs an experimental receipt according to the similarity theory, and uses the concrete specimen simulation like the thermal performance of the surrounding rock of coal mine as the coal mine roadway to realize the real-time simulation of the heat transfer process of the roadway. The unstable heat transfer coefficient of the surrounding rock under different wind speeds and ventilation specimens was tested to find the law of variation. Finally, in the actual coal mining industry, different roadways are selected for borehole temperature measurement, and the temperature record body with temperature recording function is used for measurement. The calculation formula of the original rock layer temperature at different depths of the mine area is obtained, and the accuracy of the model is verified.

Experimental Assessment of an Analytical Model of the Convective Heat Transfer Coefficient in a Mine Gallery

“…Advances in mathematical tools can be efficiently applied to explain the dynamic behavior of ventilation and cooling air. This phenomenon has been studied from different perspectives, such as the influence of the rock temperature on the air temperature [1, 5,6], thereby focusing on three-dimensional modeling of thermal management in underground mines. Determination of the conductivity [7] and thermal diffusivity of rock [8,9] at a known VRT is necessary to obtain the heat fluxes [10].…”