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Limits of flame propagation of coal dust-methane-air mixtures.

Authors
Singer-JM; Bruszak-AE; Grumer-J
Source
Pittsburgh, PA: U.S. Department of the Interior, Bureau of Mines, RI 7103, 1968 Apr; :1-12
Link
NIOSHTIC No.
20036625
Abstract
Flame propagation of lower limit hybrid coal dust-methane-air mixtures in vertical and horizontal flame ducts of 15.2 cm id and 1.8 m length has been investigated to provide information bearing on safety in mines. Fuel concentrations at lower limits of flame propagation and equivalences of coal dust and methane are much higher for continuing flame propagation than for short-span flame propagation in the vicinity of an "overdriving" ignition source. As the energy of the ignition source was increased, the flame speed and the distance of flame propagation from the ignition source increased, whereas the total fuel concentration at the lower limit decreased.
Keywords
Mining-industry; Coal-mining; Underground-mining; Flammable-gases; Flash-point; Coal-dust; Methanes
Publication Date
19680401
Document Type
Report of Investigations
Fiscal Year
1968
NTIS Accession No.
NTIS Price
Identifying No.
RI-7103
NIOSH Division
ERC
Source Name
Pittsburgh, PA: U.S. Department of the Interior, Bureau of Mines, RI 7103
State
PA
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