On the use of free jets for artificial ventilation of open pits

Abstract

Normal sanitary and hygienic working conditions in deep open pits are created by artificial ventilation, which dilutes and removes harmful vapours and gases generated by internal combustion engines and diesel engines, gaseous products of explosive decomposition of explosives, and harmful dust. The urgent need for artificial ventilation arises when the entire volume of the open pit or its deepest parts are filled with harmful substances during inversions, as well as when local accumulations of harmful impurities occur (for example, dust contamination of the atmosphere during bench drilling).

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