Control of airborne respirable dust in the face area with water sprays using a full-scale laboratory model

Technical Report · Fri Jan 01 04:00:00 EST 1988

OSTI ID:6444066

Chang, L; Courtney, W G

This report presents the results of a Bureau of Mines laboratory investigation of the effect of water sprays in reducing respirable dust that escaped the face area of a full-scale wooden model of a mine entry containing a wooden model of a ripper-type continuous mining machine and exhaust brattice. Areas examined were the general effectiveness of a low-pressure water spray system mounted on top of the mining machine boom, a high-pressure spray system mounted under the boom, and the combined top-and bottom-spray systems, and the effect of these three spray systems on the capture of coal dust particles of different sizes. Dust was injected into a sump cavity at the face. Airborne respirable dust concentration was measured behind the brattice with a personal sampler and cyclone, and particle size distribution was measured with a cascade impactor. When used alone, the top-spray system captured about 55 pct of the respirable dust in the face area and the bottom-spray system captured 60 pct; the capture efficiency of each system is decreased when they are used simultaneously. From a mass-concentration viewpoint, each spray system preferentially captures larger dust particles.

• Research Organization: Bureau of Mines, Pittsburgh, PA (USA)
• OSTI ID: 6444066
• Report Number(s): RI-9202
• Country of Publication: United States
• Language: English

Related Subjects

01 COAL, LIGNITE, AND PEAT
012033* -- Coal
Lignite
& Peat-- Underground Mining-- Mine Environment-- (1987-)
AIR POLLUTION CONTROL
COAL DEPOSITS
COAL SEAMS
CONTROL
DUSTS
EMISSION
EQUIPMENT
GEOLOGIC DEPOSITS
MINERAL RESOURCES
MINING
PERFORMANCE
POLLUTION CONTROL
POLLUTION CONTROL EQUIPMENT
RESOURCES
SCALE MODELS
SPRAYS
STRUCTURAL MODELS
UNDERGROUND MINING