Air Heat Transfer Research Of The U-shape Working Face Of High-temperature And High-humidity Mine

Coal is China’s primary energy. The demand and exploitation for coal increasedyear by year that increasing the exploitation depth of the coal mine, and also themechanization for mining continues to improve, so that the problem ofhigh-temperature and high-humidity has been more severity. Now, the calorific factorin the mine has been the major factor seriously constraining the activities for mining.Therefore, it is important to take reasonable control to the heat hazard and actualizeair-conditioning in the underground work-face of high-temperature mine. Thus, theearly research for the distribution rule of the various heat hazards in the undergroundroadway and the influence to the micro-climate environment of the work-face is ofgreat significance.This article uses the method of combining the theoretical analysis and simulationexperiment, researches the mine’s surrounding rock and unstable heat transfer theory,analyses the theoretical calculation of the unstable heat transfer coefficient and buildsthe mathematical model for the theoretical formula of unstable heat transfercoefficient and reveals the influencing factors of unstable heat transfercoefficient.According to engineering mechanics, fluid mechanics, thermodynamicsand heat transfer theory, using similar material to build the heat and moistureroadway experiment model. In the simulation experiment, by changing the inlet windtemperature, humidity, speed and wall temperature of the different experimentalconditions for the transformation law of unstable heat transfer coefficient with theinlet wind temperature, humidity, speed and wall temperature, and through a series ofmodel experiment data using statistical tools’s regression analysis for the calculationformula of the unstable heat transfer coefficient. Finally, by the test data and thetheoretical model calculation data comparative analysis, it concluded that simulationexperiment can be applied in mine laneway wind flow and heat exchange between therock around the study under the condition of some assumptions, and can be gettedideal result. It provides a good experimental research platform for the hightemperature heat pollution prevention implementing and the measures of minecooling.