Characterising dust generation from blasting (original) (raw)
2009
Abstract
Predicting the generation of dust from open pit mining operations is traditionally based on the use of "emission factors" that describe the mass of dust expected to be generated from individual mining and materials handling processes. These emission factors are based on field measurements from "typical" operations. Estimates of dust generation would have much greater credibility if they could be related directly to the characteristics of the rock at the particular site and the actual blast designs used. Available blast fragmentation models predict breakage down to perhaps 1 mm in size. An approach is described that utilizes laboratory crusher test results to extend the predicted size distribution from blasting down to dust sized particles.
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