Ecological Systems and Devices Annotation << Back INVESTIGATION OF POSSIBILITIES OF DISPOSAL OF TAILINGS IN THE HARDENING OF FILLING MIXTURE FOR UNDERGROUND MINING IN PERMAFROST A.V. Vichkanov This article discusses the possibility of disposing of tailings in hardening fi lling mixtures for underground mining. In the development of ore deposits of non-ferrous and rare metals majority (at least 80…90 %) of the mineral remains in place in the form of mining tailings. This material, in the end, is located in the surface tailings, which are located only in the recesses of the relief or temporary streams in the valleys. When organizing a closed loop circulation of this type of solid waste direct environmental effect is expressed in the form of preventing the complete destruction of the biota in the square, the value of which depends on the volume V tailings dam height and terrain. Get this effect is only possible by returning tailings in goaf mining. The main thing is not suffi ciently solved problem is extremely complex chemical composition of tailings sulphide ores of most non-ferrous metals, and especially – the content of active sulfur. It is assumed that the cause of instability and loss of strength of fi lling mixture SHHTS (slag tailings cement) is sulfate corrosion backfi ll concrete, so important in the study of the infl uence of sulfur contained in the tailings, the quality of the backfi ll concrete has a ratio between the amounts of sulfur and cement (S/C) in the AP, as the main components involved in the formation of destructive ettringite. Analysis of the results of laboratory studies revealed a relationship as a bookmark on the ratio of cement and sulfur (S/C) in the fi lling mixture. With an increase in the specifi c consumption of tails and a corresponding decrease in specifi c consumption rate of strength development of slag AP SHHTS declined. Increasing the ratio S / C leads to a decrease in the strength of bookmarks in all target dates trials (28, 90 and 180 days). Keywords: Greening; tailings; hardening stowing mixture; tailing; biota; geotechnology; sulfate corrosion kinetics of hardening and strength; specifi c consumption; ettringite. Contacts: E-mail: showman88@yandex.ru Pp. 41-46.