通気の温度変動を考慮した坑道周辺岩盤から放散される熱量に関する理論的研究
1981 年 97 巻 1120 号 p. 451-456
詳細
1981 年 97 巻 1120 号 p. 451-456
To predict the temperature of ventilation air in mines, it is essential to know the heat flow from rocks around a roadway. There have been many studies on this problem, but only a few of them dealt with the variation of the temperature of ventilation air
To predict the temperature of ventilation air in mines, it is essential to know the heat flow from rocks around a roadway. There have been many studies on this problem, but only a few of them dealt with the variation of the temperature of ventilation air
The results lead to the following conclusion;
(a) In the case of sinusoidal variation of the temperature of ventilation air, both roadway surface temperature and heat flow from rocks are calculated to a high degree of accuracy by using Eqns.(26) and (27), respectively after about four months from the beginning of ventilation.
(b) In the case of sudden change of the temperature of ventilation air, after some time from the sudden change of the temperature, both surface temperature and heat flow from rocks are calculated reasonably accurately by the method which neglects the temperature change and assumes that the temperature of ventilation air is constantly maintained at the value just after the sudden change from the beginning of ventilation.
