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Improved Parachute-type Stopping.

Authors
Bloetscher-F
Source
NTIS: PB/274-401 Available for Reference At Bureau Libraries :41 pages
Link
NIOSHTIC No.
10000753
Abstract
An improved parachute-type stopping for changing the course of mine ventilation air during emergencies was developed for the Bureau of Mines. The stopping can be quickly deployed by one person from a single attachment point and provides excellent stopping performance with the flow in the design direction. Adding pin and foam attachments between its skirt and the passageway surfaces improves its performance with flow in the design direction and maintains the stopping with zero or reverse air flows. Stopping performance results for a range of airway sizes including 7.5 By 10 feet simulated airway with pressure differentials of up to 3 inches of water are presented. Predicted performance values for this stopping design for larger passageways are also presented.
Publication Date
19770101
Document Type
CP; Final Contract Report;
Fiscal Year
1977
NTIS Accession No.
PB-274401
NTIS Price
A04
Identifying No.
OFR 163-77
NIOSH Division
PRC;
Source Name
NTIS: PB/274-401 Available for Reference At Bureau Libraries
Performing Organization
Goodyear Aerospace Corp.
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