MINE DRAINAGE IN FLAT AND PITCHING MINING OF COAL DEPOSITS WITH COMBINED METHOD Russian patent published in 2017 - IPC E02D19/06 

FIELD: mining engineering.

SUBSTANCE: mine drainage during flat and pitching mining of coal deposits with combined method includes sewage and drainage ditches of mine workings, drain sumps, pumpsets on the lower mine and open-cast horizons, pumping stations with or without drain sumps on the upper mine horizons sublevels, drain sumps and disinfection of mine waters on the surface system, connected into a single complex by a network of pipelines with stop valves. In underground drain sumps, located on the lower mine workings horizons, gravity growths of underground mine water come from the gutters of underground mine workings through underground water pre-treatment complexes, which serve to separate large and suspended particles up to 0.15 mm and immiscible liquids and floating objects with a density below water by mechanical and electrophysical methods. Then, they are delivered by the pumpsets to the drain sump, located on the lower horizon of open-cast, where they are mixed with the mine growth of open mine workings and by pumping units, located on the sides of open-cast or floating pontoon is delivered to the deep water purification complex on the surface, from where, purified and disinfected using mechanical, physical chemical methods, it flows into the surface drain sump and, after sludge, is discharged onto the terrain or external water bodies.

EFFECT: increasing the degree of mine waters cleaning and wear resistance of equipment, ensuring elimination of multistage, reducing capital costs.

3 cl, 1 dwg