ECONOMIC AND MATHEMATICAL MODELING OF UNDERGROUND GEOTECHNOLOGY OF MINING OF SUB-PIT RESERVES OF ORE DEPOSITS

Abstract

Promising options for underground geotechnology of
developing underground reserves for the conditions of
the combined open-underground mining of the Ural
copper-zinc deposit have been elaborated, which differ in the state of the quarry at the time of transition
to the underground mining method, in the procedure
of development of underground mining works in time
and space, in the method and scheme of opening, in
the mining system, in the method of isolation of underground mined-out space from the quarry, and in
the scheme of waste disposal of mining and processing production. The economic and mathematical
modeling of the elaborated options based on the complex ecological and economic criterion, taking into
account the totality of the economic effect and environmental consequences of the implementation of
geotechnological solutions. As a result of modeling
the optimal variant of underground geotechnology is
established, based on the opening of the sub-pit reserves by an autoclave from the quarry and an inclined exit from the surface and their development by
a floor-chamber system with consolidating stowing
under the ore rib. The effect is achieved due the use of
the scheme of opening of the quarry, which provides
rapid commissioning of the underground mine, and of
the development system with stowing, that allows to
dispose the most amount of mining and processing
waste in the worked-out space.