Standardized Construction of Mine Ventilating Doors Page: 2

I.C. 7280

During a recent inspection of the South Wilkes-Barre colliery of the
Glen Alden Coal Co., especial note was taken of the construction of venti-
lating doors in use along haulageways. The installations are substantial,
are as nearly airtight as is feasible to construct them and permit changing
the door readily if it is desired to reverse the air current in a section or
a split.
Acknowledgments
The standardization of doors as described in this paper was first done
by William L. Davis, superintendent at South Wilkes-Barre colliery, and
their operation has proved so efficient and economical that the Glen Alden
Coal Co. now has them installed at numerous other operations.
Davis is to be commended for the work he has done in improving the
ventilating facilities at his mine; and the authors are indebted to him for
furnishing the data herein submitted and for many other courtesies tendered
in the course of the inspection of his mine. The courtesy of the Glen Alden
Coal Co. in connection with the release of the data in this publication is also
gratefully acknowledged.
Review of Mining Conditions
At South Wilkes-Barre colliery, 10 veins of coal are being mined, in
which the pitches range from flat to vertical, between points near the out-
crop of upper veins and the bottom of the basin in the. lowest vein, about
1,500 feet below the surface. Hoisting shafts are 1,030 and 1,408 feet in
depth, with landings 698, 1,030, and 1,408 feet below the surface.
Gangways along the strike are developed in the veins at many levels,
the coal being transported to the levels upon which the shaft landings are
located through numerous slopes, planes, and rock tunnels which inter-
connect all of the veins.
Ventilation is induced by two fans, operated exhausting, each of which
is handling practically its capacity of 400,000 cubic feet of air a minute at
water-gage pressures of 2-3/4 and 3-1/4 inches, respectively. The venti-
lating system, which embraces some 40 splits, is exceedingly complex;
and since the mine is liberating more than 3,000,000 cubic feet of methane
in 24 hours, every consideration must be given to maintaining adequate
volumes of air in the splits and a.t the face workings and minimizing the
handling of fugitive air at the fans.
Sufficient volumes of.air are supplied at the faces by the use of
concrete stoppings, air bridges, and substantial main doors, which are

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Hartley, J. C. & Moschetti, A. C. Standardized Construction of Mine Ventilating Doors, report, April 1944; Washington D.C.. (digital.library.unt.edu/ark:/67531/metadc67029/m1/4/ocr/: accessed November 16, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.

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