The technology of mining tungsten-molybdenum ore of Slepaya Zalezh at Tyrnyauz deposit

Abstract

Introduction. The article considers the issues of base ore effective mining at the Tyrnyauz tungsten-molybdenum deposit with different methods for filling man-made voids. The objective is to substantiate the reduction in expenditure on the ore-hosting rock mass state control by using tailings to prepare the backfill blends Methods of research. The complex of studies includes the study of engineering and geological conditions of development, the study of the properties of hardening mixture components, the theoretical justification of rock mass stability control methods, and the proposed solutions evaluation. Laboratory studies are carried out on samples made of equivalent and optically active materials. Physical and mechanical properties of rocks and blends are determined using the accepted methods, results are processed by mathematical statistics methods. Results. Ore-hosting rock mass states are analyzed when using a development system with open or filled unbound material. The ore mining technologies type designs by the criterion of rock mass stress control is proposed. The results of modeling the methods of fields development are presented, with and without voids filling, as well as a mathematical model construction and calculation in Maple. The optimal parameters of lost reserves dredging are calculated. The equivalence of qualitative indicators of losses and other field development efficiency indicators has been established. The results of modeling various technologies with different degrees of void filling are given. It is shown that ore loss and dilution mitigation, when optimizing the rock mass state control, compensates for the costs of hardening mixtures. Conclusions and scope of results. Field development without void filling increases losses and dilution to the limit of economic feasibility. There are equivalent ratios between ore quality indicators and other technology indicators, which are the basis for improving the indicators of the lost ore reserves extraction. The obtained results may be in demand when modernizing technologies for the development of solid metal-containing mineral raw materials.