«Kombinat KMAruda» JSC (Gubkin, Russia):

Tomaev V. K., Managing Director, e-mail: tomaev@kmaruda.ru

«Kombinat KMAruda» JSC completely turned to non-waste production of iron ore concentrate in 2009. Underground waste area is the storehouse of 100% of concentration wastes. Water consumption was decreased by 15–20 times. By the beginning of 2013, more than 10.5 mln. t of tailings (dry basis) were put into mine. For the first time in the world, the stowing operations, related to filling of the worked out area, are being realized during the extraction of poor iron ores with simultaneous decreasing of costs and ecological problems solving. At the same time, there is being increased the profitability of production and safety of mining operations. There was found the way to opening of underlying reserves of ferruginous quartzites. The obtained experience can be used both during the aimed projecting of developments and underground mastering of new Kursk Magnetic Anomaly deposits, and during the gradual transition from open casting in the basin to the following development of exploit deposit by combined method. Strategical issue of an enterprise is the transition to development of the new floor reserves, because the amount of the exploit floor reserves is left for the following 8-10 operation years. Underlying floor of ferruginous quartzites' reserves is aimed to be opened by three new shafts and cross-cuts. There is also aimed to unite this floor by inclinations with existing horizons. Horizon and single-stall system is the development system with vibration drawing of ore and hydraulic stowing by concentration tailings. The floor's height is 80 m. New sinking operations are prepared to be started. 7 mln. t of quartzites will be extracted from new development floor, which will guarantee 3.2 mln. t of concentrate output. Lifetime of the enterprise is not less than 35 years.

1. Kaplunov D. R., Leyzerovich S. G., Tomaev V. K., Sidorchuk V. V. Gornyi Zhurnal — Mining Journal, 2011, No. 10, pp. 44–49.