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Impact of Using Auxiliary Fans on Coal Mine Ventilation Efficiency and Cost.

Authors
Brunner-DJ; Brunner-DJ
Source
MISSING :8 pages
Link
NIOSHTIC No.
10007689
Abstract
Coal mine ventilation systems are often subject to high leakage rates. As a result, changes in airflow resistance will strongly affect the efficiency with which air is delivered to the working place. One major source of airflow resistance is the line brattice used to direct air from the last open crosscut to the working face. Because it is a great distance from the fan, the resistance of the line brattice can result in more overall leakage than an equivalent resistance closer to the fan. Substituting auxiliary fans for brattice eliminates this source of resistance, with improvements in system efficiency and cost. Also, in some mines, the leakage that leads to spontaneous combustion can be reduced. The benefits obtained by several different brattice and fan substitutions have been studied by Mine Ventilation Services, Inc., Lafayette, California, under contract to the U.S. Bureau of Mines. Changes in main fan duty were compared with additional costs associated with auxiliary fans. Results indicate that in some circumstances, considerable leakage reductions and cost savings are possible.
Publication Date
19900101
Document Type
IH; Report of Investigations;
Fiscal Year
1990
NTIS Accession No.
NTIS Price
Identifying No.
RI 9307
NIOSH Division
PRC;
Source Name
MISSING
State
CA;
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