A Treatise On Practical And Theoretical Mine Ventilation
A Treatise On Practical And Theoretical Mine Ventilation
E B Eugene Benjamin Wilson
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What amount of air will circulate when the current is split into two, three, four, and five equal divisions, the pressure remaining constant? The effect of splitting into two, three, four, and five equal air-courses will be to double, treble, etc. , the areas without altering the rubbing-surface, because the area after splitting is two, three, etc. , times that of the ori- ginal airway, although the rubbing-surface remains the same ; and as the quantity may be found by the formula (x) 9 we may ...substitute the values of the symbols, and find the quantities of the various splits under consideration. 31. MINE VENTILATION. 81 Since, however, in the above formula, p, &, and s remain constant, and a varies, we may simplify the work by eliminating them, and use ^a X a = q, which corre- sponds to one of our former laws ; viz. , " that the rela- tive quantities will be according to the square root of the area multiplied by the area, and then multiplied by the original quantity flowing through the mine.
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