V. A. Uskov

Support design criteria for mine workings in the zone of influence of stoping in Zapolyarny Mine

In focus is the methodology of the support design for a tunnel in disseminated ore mining in Zapolyarny Mine, Transpolar Division, Norilsk Nickel. The calculation of the rock bolting parameters in the zone of influence of stoping is exemplified.

Selecting support for preparatory drives in the influence zone of stoping in Talnakh Mines

The article sets methodological basis for selecting support for preparatory drives in copper–nickel ore mining by Transpolar Division of Norilsk Nickel. The authors present a case study of selecting support for preparatory drive in the influence zone of top-down multi-slice breast stoping.

Resource-saving geotechnologies for thick gently dipping complex ore deposits in the Norilsk region

The article gives an account of process designs accepted and introduced in mines at Norilsk-1, Talnakh and Oktyabrsky deposits and describes new promising patented mining methods successively trialed at a commercial scale or proposed for industrial testing.

Increased ore extraction from thin flat-dipping veins using self-propelled equipment

The options of improving ore extraction from underground thin flat and inclined ore veins using self-propelled machine complexes are discussed in terms of renovated technology application in the Karalveem gold ore field.

Extraction of gold-bearing ore from under the open pit bottom at the Makmal deposit by room-and-pillar mining with backfill made of production waste

The article describes the experience of backfilling mined-out spaces in the north and south ore lentils of the Southern orebody of the Makmal deposit, Kyrgyz Republic, through gaps in the open pit bottom by using noncommercial dump material. The theoretical and technological aspects of safe underground extraction of safety pillar are discussed.

Influence of Magnetic Flux Concentrator on the Efficiency of Iron Ore Dressing

The laboratory and industrial experiments on magnetic iron ore showed that magnetic and nonmagnetic fractions are more effectively separated with the magnetic flux concentrators arranged on magnetic drums of separator. Improvement of the equipment makes it possible to increase the content of iron in concentrate by 5-8% and decrease the losses of metal in final tails by 1-3%.