Mining and mine ventilation : a practical handbook on the physics and chemistry of mining and mine ventilation for vocational schools, and for those qualifying for mine foreman and by Walsh Joseph James 1874-

Author:Walsh, Joseph James, 1874-
Language: eng
Format: epub
Tags: Mine ventilation
Publisher: New York : Van Nostrand
Published: 1915-03-25T05:00:00+00:00

FIG. 24.

position and curvature of the blades, which are so arranged that the air is discharged in a forward direction, and each blade is backed up by an auxiliary blade which prevents eddy currents and the slippage of air.

The conical scoops, by their special form and position prevent the gushing of air from the inlet when working against a high water gauge.

Fig. 24 shows plan and side view of a double inlet exhaust reversible fan with explosion cover, on a shaft mine.

MINING AND MINE VENTILATION

TABLE M

PERIPHERAL SPEEDS OF FAN REQUIRED FOR THEORETICAL WATER GAUGE

The following table gives a comprehensive idea of the results obtained from various sizes of Jeffrey mine fans. It is understood that the proportions of the fans may be changed to meet other conditions, that is, a fan may be built wider to handle economically a larger volume at the same gauge, or on the other hand the fan may be built narrower to handle a smaller volume at the same gauge while the speed of the fan remains constant.

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