Author 1:
Name & Surname: Isiyanov O. A.
Company: Priargunsky Industrial Mining and Chemical Union (Krasnokamensk, Russia)
Work Position: Head of Engineering Office

Author 2:
Name & Surname: Silkin A. A.
Company: VNIPIpromtekhnologii JSC (Moscow, Russia)
Work Position: Head of laboratory
Scientific Degree: Candidate of Engineering Sciences

Contacts: e-mail: Silkin.A.A.@vnipipt.ru

Author 3:
Name & Surname:  +Rubtsov S. K.
Company: VNIPIpromtekhnologii JSC (Moscow, Russia)
Work Position: Principal Researcher
Scientific Degree: Doctor of Engineering Sciences

Author 4:
Name & Surname: Seleznev A. V.
Company: VNIPIpromtekhnologii JSC (Moscow, Russia)
Work Position: Head of Research Department
Scientific Degree: Candidate of Engineering Sciences

the related substantiation of rational groups of small-size equipment and selective ore breaking and excavation aimed at minimization of ore dilution, increase in price of marketable uranium ore as compared with breaking-out in bulk and, thus, satisfactory efficiency of mining of ore bodies less than 1.5 m thick. Based on the analysis of small-size drilling units and load-haul-dumpers, which are in operation in mines and manufactured by various plants, five alternatives of machine grouping are offered for operation in various cross-section stopes and in various working conditions, and the optimum machine group is selected by the criteria of productivity, reliability and cost. Technologies of selective drilling-and-blasting, actual mining and separate ore and barren rock haulage are described. Aiming at higher efficient selective mining of thin ore bodies, the article makes recommendations on: flow chart of scenarios of selective breaking and mining of ore and barren rocks; improved alternatives of downward horizontal slicing with shothole blasting and solidifying backfilling; mining method for thin veins with selective extraction of ore by short vertical cuts (columns) with shothole blasting and barren rock shrinkage in mined-out area. Economical evaluation of crude and high-grade ore extraction from thin ore bodies is given with regard to the recommended technological innovations.

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2. Agoshkov M. I. Konstruirovanie i raschet sistem i tekhnologiy razrabotki rudnykh mestorozhdeniy (Construction and calculation of systems and technologies of ore deposit development). Moscow : Nedra, 1965. 220 p. 

3. Standart predpriyatiya STO 07621060-056-2012. Sistema razrabotki «Gorizontalnye sloi s tverdeyushchey zakladkoy» (Standard of enterprise STO 07621060-056-2012. Development system «Horizontal layers with solidifying slope»). Krasnokamensk : JSC «Priargunsky Industrial Mining and Chemical Union», 2012. 88 p. (in Russian).

4. Tekhnologicheskiy reglament TR 07621060-09-2012. Vedenie ochistnykh rabot v usloviyakh podzemnykh rudnikov (Technological regulations TR 07621060-09-2012. Stoping in the conditions of underground mines). Krasnokamensk : JSC «Priargunsky Industrial Mining and Chemical Union», 2012. 57 p. (in Russian).