巷道围岩温度分布及调热圈半径的影响因素分析.pdfVIP

15 2 Vol . 15No . 2 2 0 0 5 2 China Safety Science Journal Feb . 2 0 0 5 高建良 教授 杨 明 (河南理工大学科技产业处) (河南理工大学资源与材料工程系) :6204099 分析了巷道壁面水分蒸发情况下 风时间岩石的热物理性质巷道几何尺寸巷道风流与围岩 壁面的对流换热系数壁面湿度系数与风流相对湿度的变化对围岩温度分布及调热圈半径的影响随着 风时间 的延长, 围岩冷却范围逐渐向围岩内部推移, 推移速度逐渐降低;巷道壁面水分蒸发和风流相对湿度对靠近壁面处 围岩温度分布影响很大, 但对深部围岩温度分布的影响逐渐变小, 所以对调热圈半径的影响很小;岩石导温系数对 调热圈半径及其内部的温度分布影响较大巷道壁面风流与围岩的换热系数和巷道的几何尺寸对巷道围岩的冷 却范围影响非常小 围岩温度场;调热圈;壁面湿度系数; 风流相对湿度;导温系数 Analysis of the Factors Influencing Temperature Distribution of Surrounding Rock and Cooled Zone Radius GAO Jian-liang, Prof. YANG Ming ( enan Polytechnic University) Classification and cod of disciplin s: 620. 4099 Abstract: Temperature distribution of the surrounding rock and its variation with ventilation time, airway scale, temperature conductivity, heat convection coefficient, wetness factor and relative humidity of airflow are analyzed with taking consider of the water evaporation on the airway surface. Cooled zone expands with the increase of the ventilation time, but the expanding speed decreases with the ventilation time elapse. Thewater evaporation on airway surface andrelativehumidity of airflow have agreat in- fluence on the temperature distribution of the surrounding rock near the airway surface, but have a little effect to thetemperature distribution of the surrounding rock in deeper area. Temperature conductivity of rock has agreat influence on cooled zone radius and thetemperature distribution in cooled zone. eat convection coefficient and airway scale have little influence on the area of cooled zoneby ventilation. K y words: Temperature distribution