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Model Studies to Determine the Optimum Practical Rearrangement of Timberwork to Ensure Minimum Resistance Values for Rectangular Shafts.

Authors
Hoskins-JR; Gregory-CE
Source
NTIS: PB/213-717/3 Available for Reference At Bureau Libraries :26 pages
Link
NIOSHTIC No.
10000756
Abstract
This research was conducted to determine optimum configurations of rectangular shaft supports, lining, and fixtures to reduce head losses. Model studies in a specially designed wind tunnel provided information useful as a guide to remedial measures on old shafts or to design new ones. The research disclosed that airway resistance could readily be reduced 25 percent by relatively minor modifications in the timber or steel supporting sets. Potential annual savings in power costs are given. The methods described can be applied to reduce airway resistence in mines with severe ventilation problems.
Publication Date
19720101
Document Type
CP; Final Contract Report;
Fiscal Year
1972
NTIS Accession No.
PB-213717/3
NTIS Price
A03
Identifying No.
OFR 36-72
NIOSH Division
SRC;
Source Name
NTIS: PB/213-717/3; Available for Reference At Bureau Libraries
State
ID;
Performing Organization
University of Idaho
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