Evaluation of methods for controlling silica dust exposures of roof bolters.
Trans Soc Min Metall Explor 2003 Jan; 312:133-137
This paper examines methods for limiting occupational silica exposures for roof-bolting personnel in underground coal mining. A canopy air curtain and an air tube were evaluated as means to provide filtered air over the breathing zone of these personnel. Laboratory testing showed that dust reductions beneath the air curtain and air tube approached 60% and 40%, respectively, with low interference air velocities. The data with distance. This paper also evaluates a metal rake, a flexible insert and a rigid insert for cleaning the roof- bolter dust collector box. Less dust was produced when using the rigid insert. Surprisingly, the flexible insert was sometimes no better than scraping or raking the dust onto the mine floor. However, little dust got on the workers coveralls when using either of the inserts.
Silicates; Silica-dusts; Underground-miners; Underground-mining; Air-filters; Dust-exposure; Dust-control-equipment; Dusts; Mining-equipment; Mining-industry; Miners; Respirable-dust; Control-technology; Engineering-controls
Transactions of the Society for Mining, Metallurgy, and Exploration