Smirnov A. A., Senior Research Worker of the Laboratory of Underground Geotechnology, Candidate of Engineering Sciences, e-mail: geotech@igd.uran.ru, Antipin Yu. G., Senior Research Worker of the Laboratory of Underground Geotechnology, Candidate of Engineering Sciences, Institute of Mining Ural Branch of Russian Academy of Sciences

The technology of development the makeshift inter-layer pillar in Gaisky underground mine is introduced. As a result of estimation the variants of development considering the Gaisky deposit specific character of mining-technical and mining-geological conditions it is set up that the inter-layer pillar development is to be conducted by two sublevels. The variants of sublevel-chamber mining system depending on the chambers height in the sublevels are shown. The technical-economic comparison of the studied variants in terms of the methods of defining the profit received on ore mining, considering losses and dilution is cited. It is established (set up) that the inter-layer pillar development is most efficiently conducted by two sublevels of different height, by this self-propelled loading-delivery vehicles with remote control being employed. The put forward technology to a greater degree answers the principles and factors of ascending extraction and the specific character of mining-geological and mining-technical conditions of deposit exploitation, that makes it possible to develop the reserves of inter-layer pillar safety and most efficiently.

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