SUBSTANTIATION OF UNDERGROUND TECHNOLOGY FOR FURTHER DEVELOPMENT OF A GOLD DEPOSIT RESERVES

Abstract

The complex of technical decisions on opening, preparation and clearing excavation of reserves of a gold ore deposit at the stage of further development to maintenance the capacity of an underground mine is ascertained. A specificity of this step is a need for involving into exploitation of ore bodies bordering to the earlier developed blocks and the diversity of geological and mining-technical conditions caused from a large number of fragmented ore bodies with minor stocks. The ore bodies have
a complex shape and are built up of a series of contiguous quartz loads, lenses, veins and irregularly shaped vein formation from 1 to 7 m. For the present conditions a step-wise scheme of rock mass transporting has been designed, opening of the used part of the field has been completed by the necessary ventilation-way elements, chutes, bypass workings and inclined moving ways. These technical solutions provide timely access to all the reserves of the deposit, the safety of mining, the efficient transportation of ore and the ventilation of the faces. For different miningand-geological conditions some variants of developing systems have been engineered with a universal scheme of preparation mining block, in the case of changing conditions allowing to move from one technology to another without any extra cost. High ore production output indicators and ore quality are achieved through the use of designed systems that respond specific geological conditions, and through the maximum possible use of the most effective system of sublevel drifts. The obtained minerals extraction parameters and specific volumes of capital mining works and preparatory-threaded works do not exceed the corresponding indices achieved when developing such deposits. The taken technical and technological solutions ensure the effective development of all the reserves
of the field.