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Reverse performance characteristics of main mine fans.

Authors
Dunn-MF; Kendorski-FS; Bhattacharya-S; Rajaram-V; Thimons-ED
Source
Min Sci Technol 1983 Oct; 1(1):59-68
NIOSHTIC No.
10003197
Abstract
During a mine fire or other emergency, it may be desirable to reverse the airflow in order to provide an escapeway or to isolate a fire. Also, in colder areas, the airflow may be reversed to prevent ice buildup. When reversing main mine fans, the mine operator usually does not know what operating characteristics of flow and pressure to expect. Laboratory and field tests of vane axial main mine fans were conducted to establish forward and reverse performance characteristics under controlled conditions and in typical mine installations. All fans tested were between 81 and 96 in (2.1 and 2.4 M) in diameter. The data obtained suggest that reverse performance characteristics are dependent upon the blade angle and the hub-to-tip ratio. There is also evidence that reverse performance can be predicted for a family of blade angles for a given hub-to-tip ratio. Generally fan quantity is 30% to 60% less in reverse than when operating in the normal forward mode, with static pressure equal to the square of the volume percentage change.
Keywords
Mining-industry; Underground-mining; Mine-fires; Mine-escapes; Mine-disasters; Ventilation; Ventilation-systems
CODEN
MSTEEV
Publication Date
19831001
Document Type
OP; Journal Article
Fiscal Year
1984
NTIS Accession No.
NTIS Price
Identifying No.
OP 78-83
Issue of Publication
1
ISSN
0167-9031
NIOSH Division
PRC
Source Name
Mining Science & Technology
State
PA; IL
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