圧力損失算定式の誘導および火災風下側圧力損失の計算値と実測値の比較

坑内火災時の通気圧力損失に関する基礎的研究 (第1報)

抄録

Mine fires not only bring serious losses on the mines as the result of burning off facilities, machinaries and materials, butalso inflict a bodily injury upon persons working underground or under certain circumstances, cause heavy casualties sufferingfrom heat, smoke and toxic gasses generated.
In underground mines, they usually adopt forced ventilation to keep safety and healthy working environment. If a minefire takes place somewhere underground, however, the pressure distribution in the ventilation network of the mine is disturbed, and in the worst case the direction of ventilation is reversed.
It is therefore definitely important to estimate the ventilation pressure change during a mine fire.
In this report, under some assumptions to simplify the mine fire phenomena (see Fig. 1), the authors derived the equation (see Eq. 23) to calculate total pressure drop in a mine roadway where combustion products flow in. And then compared valuescalculated by the Eq. 27 corresponding to the case ofθ=0 in the Eq. 23 with measured using the horizontal model duct.In result, it was proved that there was fairly good agreement between the calculated and observed values (see Fig. 5).