PREVENTION AND SUPPRESSION OF DUST-GAS EJECTION IN OPEN PIT Russian patent published in 2015 - IPC E21F5/04 

FIELD: mining.

SUBSTANCE: invention relates to mining. Claimed method comprises the creation of water barriers on the way of dust-gas cloud movement. Said cloud is isolated while pit surfaces are wetted by irrigation atomizers arranged in the pit working zones. Water is fed to said atomizers via pressure lines of the pit dewatering plant by means of the pumps operated in the nominal mode. Said mode allows discharging of water inflows into the pit at maximum efficiency and sufficient stability as far as cavitation self-oscillations are concerned, and keeping of irrigation parameters stable. Note here that irrigation parameters are controlled by water pressure adjustment over the pressure lines length with the help of pipe shutoff valves and accessories. Note here that said nominal operating mode of the pumps is maintained by throttling of said pressure lines or by variation of the pumps drive shaft rpm. Besides, water pressure is additionally controlled by gate valves distributed over pressure lines length.

EFFECT: higher efficiency of suppression at transient dust-gas conditions of the pit irrigated zones.

1 dwg