The article deals with the development technologies of deep ore deposits with medium life cycle. These deposits are a promising source of raw materials for many Russian mining enterprises. The "upward" and "downward" technology of stripping and development of such deposits is proposed. The results of regime-deformation tests in the "up-down" technology and their comparison with the results in the "down-down" technology are given.

Modern stripping schemes for steeply dipping ore deposits are analyzed. Possible stripping schemes for ore body mining in the combined ascending-descending order of operations are designed. Dependences of the reduced costs on the depth of the first stage of stripping and the angle of dip of the ore body at the combined order of deposit development are established. Conclusions and recommendations are made.

The analysis of domestic and world practice of development of technogenic resources shows that their development can serve as an additional source of obtaining non-ferrous and precious metals for mining enterprises, as well as contribute to the reduction of the harmful effects of toxic substances on the environment and the return to the economic turnover of previously withdrawn lands. For a number of mines, the development of man-made deposits is a priority source of existence of the mining enterprise. However, the practical development of such deposits is not carried out, as at the mining enterprises the technology and working projects of selective development of man-made deposits of minerals are absent. The requirements to the technological schemes of development of technogenic deposits are substantiated and the ways of selective excavation of useful components from the tailings of concentrating factories, providing the extraction of only the most enriched sections with leaving the main mass of rocks in place of their occurrence, are proposed.

The possibility of using the ascending order of mining deep horizons of the Zapolyarnoye deposit at the Severny mine of the Kola MMC instead of the currently used descending order of development system with sub-stage ore excavation and backfilling of the mined space with solid monolithic backfill is considered. It is proposed to switch to a two-stage development of chambers with the use of combined stowing in the ascending order of excavation within the entire field: solidifying monolithic stowing of the I stage chambers and rock stowing of the II stage chambers. Monolithic solid stowing serves as a retaining wall when excavating phase II chambers. Calculations according to the Coulomb theory allow us to consider the ratio of phase I and II chambers sizes equal to 1:7 to be expedient. Replacement of solid stowing with combined stowing, most of which is represented by rock, as well as transition to increased height of chambers will reduce the cost of extracted ore and improve the geomechanical situation in the host rocks.

The data on the content of useful components in the wastes of non-ferrous metallurgy enterprises and the dynamics of their growth are given. The features of formation of technogenic deposits and distribution of non-ferrous metals within them are studied. It is established that although the content of metals in the technogenic deposit changes in different directions, the maximum changes are most often observed vertically. The requirements to technological schemes of technogenic deposits mining are substantiated and methods of selective excavation of useful components from tailing ponds of enrichment plants are proposed, providing for the extraction of only the most enriched areas with leaving the bulk of rocks in the place of their occurrence.

The Kaula copper-nickel deposit was developed in the upper part by open pit and in the lower part by underground mining with priority extraction of chamber reserves. Recently, the second stage of development - excavation of the remaining ore pillars - has been switched to. The deposit is represented by a stratum-shaped deposit with variable thickness and dip angle; the depth of occurrence is up to 400 meters (vertically). The strength of the ore is characterized by a coefficient of 8-12, and of the host rocks - 8-14 according to M. M. Protodyakonov.

In the practice of development of mineral deposits there are many cases of application of combined development systems with excavation of chamber reserves and leaving temporary pillars. In this case, at deposits with relatively stable ores and rocks, as a rule, the chambers are mined by highly efficient systems with subsequent filling of the excavated space with dry backfill material - rock from field workings and overburden of the open pit. In the left inter-chamber and inter-storey pillars often remains up to 50-60% of the total reserves of the deposit, which are extracted by labor-intensive and low-performance systems (layer caving, with the station bracing and backfill, etc.)...

In 1966 at the Kaula-Kotselvaara mine of the Pechanganickel Combine, experimental work was carried out on the development of an inter-chamber pillar located between the walls of the cement-reinforced backfill. Pilot works were carried out in a 6-8 m thick section of the ore body with a dip angle of 26-30°. The intervening rocks - phyllites - are partially broken by transverse fractures. In general, the ore and rock are stable. Ore strength coefficient is 8-12, rock strength coefficient is 10-12. Volume weight of the ore is 3.2 t/m³ and of the embedding material is 2.8 t/m³.