Best Practices for Dust Control in Coal Mining by Jay F. Colinet, James P. Rider, Jeffrey M. Listak, John A.

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 way of the U.S. Dept of health and wellbeing and Human prone, CDC/NIOSH workplace of Mine safeguard and healthiness study, this 2010 guide used to be constructed to spot on hand engineering controls which may aid the decrease employee publicity to respirable coal and silica airborne dirt and dust. The controls mentioned during this instruction manual diversity from long-utilized controls that experience built into criteria to more moderen controls which are nonetheless being optimized. The cause used to be to spot the easiest practices which are on hand to manage respirable airborne dirt and dust degrees in underground and floor coal mining operations. This guide offers normal info at the keep watch over applied sciences besides huge references.

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Unidirectional cutting sequence. Unidirectional cutting may allow for greater flexibility to place workers upstream of the dust sources than bidirectional cutting [Kissell et al. 2003]. Depending on roof conditions, this may allow the operators to modify the cut sequence so that shields are only advanced downwind of the shearer. Activating shield advance as close to the tailgate drum as possible and keeping 34 jack setters upwind of the advancing shields may protect the jack setters from elevated dust levels by keeping them in a clean air envelope created by the shearer’s directional spray system.

Remote control also enables mines to advance farther than the traditional 20-ft cut, if approved by MSHA. However, deep-cut mining requires that additional ventilation and dust control measures be incorporated. The machine-mounted scrubber is a critical component for deep-cut mining [Schultz and Fields 1999]. Flooded-Bed Scrubbers Remotely controlled continuous miners allow the operator to remain under supported roof while the miner can advance to cut depths up to 40 ft, if approved by MSHA. Extended cuts reduce the number of face changes required of the miner, which can lead to higher production.

Crescent sprays. Crescent sprays (Figure 3-13) can be located on each ranging arm and are typically oriented inward toward the cutting drum. These sprays are located on the top and end of the ranging arm. It is important that these sprays be aimed inward toward the cutting drum and appropriately spaced to provide uniform wetting of the entire cutting zone. Crescent sprays on the headgate ranging arm should be used with caution. Sprays on the end of the headgate ranging arm are oriented into the face airflow, which can create turbulence that forces dust toward the walkway [Colinet et al.

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