Citation

Zlochower IA, Sapko MJ, Perera IE, Brown CB, Harris ML, Rayyan NS. J. Loss Prev. Process Ind. 2018; 54: 103-109.

Affiliation

Pittsburgh Mining Research Division, National Institute for Occupational Safety and Health, 626 Cochrans Mill Road, Pittsburgh, PA, 15236, United States.

Copyright

(Copyright © 2018, Elsevier Publishing)

DOI

10.1016/j.jlp.2018.03.004

PMID

29681689

PMCID

PMC5903280

Abstract

The relationship between the explosion inerting effectiveness of rock dusts on coal dusts, as a function of the specific surface area (cm²/g) of each component is examined through the use of 20-L explosion chamber testing. More specifically, a linear relationship is demonstrated for the rock dust to coal dust (or incombustible to combustible) content of such inerted mixtures with the specific surface area of the coal and the inverse of that area of the rock dust. Hence, the inerting effectiveness, defined as above, is more generally linearly dependent on the ratio of the two surface areas. The focus on specific surface areas, particularly of the rock dust, provide supporting data for minimum surface area requirements in addition to the 70% less than 200 mesh requirement specified in 30 CFR 75.2.

Language: en

Keywords

Dust explosion prevention; Inerting coal dust; Mining; Particle size; Specific surface area