Investigation of the source of dust emission during drilling with compressed air blowing through the borehole

Abstract

The intensity of fracture product yield during rock drilling is directly dependent on the drilling speed. The total yield of fracture products is taken into account when calculating dust removal systems and devices for accumulation of drill cuttings. However, it is known that the drilled fines have a complex fractional composition. The most dangerous for human health are particles smaller than 10 μm. These particles are able to stay in suspension for a long time and, accordingly, to spread over long distances. Therefore, when evaluating the intensity of a dust source from the point of view of its danger, it is necessary to be guided by the content of the smallest fractions in the drilling fines taken out of the borehole. ...

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