围岩对矿井入风流温度的影响分析

基于传热学理论，结合湿壁特点，建立了矿井入风流与巷道岩壁间热湿交换数学模型，分析了巷道几何尺寸、岩层热物理性质及入风流初始温度对入风流温度的影响。分析结果表明，岩层热物理性质对井下风流影响最大，风流温度随着垂直深度的下延呈线性增加；巷道几何尺寸对井下入风流影响较小，巷道水力半径越大，在同一深度的平巷内入风流温度变化越大；入风流初始温度对井下空气流的影响随着深度的增加逐渐减小，到达增温层深处空气流温度主要受岩层放热的影响。

Analysis of the Influence of Surrounding Rock on Mine Inlet Air Temperature

Based on heat transfer theory, and in consideration of the characteristic of moist wall, the mathematical model of heat and moisture transfer between mine inlet air and airway walls was set up and the factors influencing inlet air temperature were analyzed, including tunnel physical dimension, rock thermophysical nature, and initial temperature of inlet air. The results show that rock thermophysical nature is the main factor influencing the inlet air temperature in underground mine; the air flow temperature increases with the depth of mine; the larger the hydraulic radius of tunnel is, the greater the change in the inlet air temperature in drift at the same depth will be; the influence of the initial inlet temperature on the underground air flow decreases with the increase in depth; and at the deep level of temperature increasing zone, the air flow temperature is mostly affected by the rock stratum exothermicity.