By Jay F. Colinet, James P. Rider, Jeffrey M. Listak, John A. Organiscak, Anita L. Wolfe, Departmentof Health and human Services Centers for Disease Control and Prevention, National Institute for Occupational Safety and Health
Compiled by means of the U.S. Dept of healthiness and Human companies, CDC/NIOSH workplace of Mine security and future health examine, this 2010 instruction manual was once constructed to spot on hand engineering controls that may aid the lessen employee publicity to respirable coal and silica dirt. The controls mentioned during this guide diversity from long-utilized controls that experience constructed into criteria to more moderen controls which are nonetheless being optimized. The rationale was once to spot the simplest practices which are on hand to manage respirable airborne dirt and dust degrees in underground and floor coal mining operations. This instruction manual offers normal info at the keep an eye on applied sciences besides huge references.
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Antirollback spray system for miner. • High-pressure sprays are recommended for redirecting of dust. High pressure (>150 psi) raises the efficiency per unit of water [Jayaraman and Jankowski 1988] and is effective for air moving (Figure 4-5). However, care must be taken when determining location and direction because high pressure can cause turbulence, leading to rollback. • A directional spray system design (spray fan) is a water-powered ventilation system originally designed to sweep methane gas toward the return.
S. Bureau of Mines contract J0199046. NTIS No. PB 83-109207. Laurito AW, Singh MM [1987]. Evaluation of air sprays and unique foam application methods for longwall dust control. Engineers International, Inc. S. Bureau of Mines contract J0318095. NTIS No. PB89-189922. Listak JM, Chekan GJ, Colinet JF [2001]. Laboratory evaluation of shield dust entrainment in high velocity airstreams. In: Transactions of Society for Mining, Metallurgy, and Exploration, Inc. Vol. 310. , pp. 155–160. MSHA [1989]. Belt entry ventilation review: report of findings and recommendations.
Although use of the tailgate-side splitter arm has declined, a similar benefit was observed at mines that installed a spray manifold on the tailgate end of the shearer (Figure 3-14). These sprays are oriented parallel to the tailgate ranging arm or angled slightly toward the tailgate drum and act as a water curtain confining the dust cloud near the face. It is important that these sprays confine the dust along the face and not cause excessive turbulence that could cause the dust to migrate away from the cutting drum and into the walkway.