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Evaluation of the Use of Air Curtains to Increase Face Ventilation.

Krisko-WJ

NTIS: PB/274-324 Available for Reference At Bureau Libraries :126 pages

10000758

Laboratory and in-mine tests were used to determine the feasibility of using an air curtain in place of brattice cloth to separate incoming air from exhaust air at the face of a room-and-pillar underground coal mining operation. Laboratory experiments proved that the concept of an air curtain separating two parallel streams of air is valid. The in-mine tests consisted of measuring respirable dust concentrations at the operator's position both with and without the air curtain. These tests demonstrated that the installed air curtain could act as effectively or more effectively than line brattice in coursing air to the working face.

19770101

CP; Final Contract Report;

1977

PB-274324

A08

OFR 157-77

PRC;

NTIS: PB/274-324 Available for Reference At Bureau Libraries

Donaldson Company, Inc.