Norilsk State Industrial Institute

the article analyzes the existing views on risk management and determines the place of risk management in the enterprise management system.The main principles of risk management and the ability to manage risks in enterprises are defined.The main methods of risk management at the enterprise are described.

The plagioclases of the Kharaelakh intrusion on the western part of the Oktyabrsky deposit were analyzed by infrared spectroscopy. Analysis of 130 Fourier-IR absorption spectra of plagioclases with selective verification of their chemical composition by X-ray spectral microanalysis indicates a regular change in the isomorphic series from albite (1150, 1096 cm–1) to anorthite (1142, 1275 cm–1), depending on the degree of differentiation of rocks in the intrusion. According to Fourier-IR spectroscopy, albite is confined to olivine-containing and olivine gabbro-dolerites. Anorthite is evenly distributed in gabbro-dolerites, but predominates in leucocratic gabbro. Among the impurity elements in the structure of the mineral, Fe3+ is noted at peaks of 1580–1644 cm–1 in picrite gabbro-dolerites, where ore interspersed mineralization of chalcopyrite, pyrrhotite, and pentlandite is directly developed. In addition to iron impurities, aluminum, potassium, barium, and strontium are also characteristic impurities in plagioclases. The totality of the data used in the section of the intrusion increases the indicative value of plagioclases and can be recommended as an additional mineral criterion of ore content.

The paper presents one of the solutions to reduce the installed power and increase efficiency of hydraulic pump drive of high power pressing equipment used in metallurgical plants. The authors have developed a multistage hydraulic drive based on a block gear-multiplier. Plungers of all cylinders form a movable block, the cylinders – a stationary one. The mode of operation (reduction, multiplication) is provided by a combination of output cylinders supplying fluid to the power cylinder by switching some of them to drain. Analysis of a four-stage drive with a three-stage multiplier gearbox is presented in comparison with a simple pump drive. A four-stage drive with two output cylinders provides a reduction gear and two multiplier stages, with which a stage of fluid supply to the power cylinder directly from the pumps (pump stage) is combined. Power and kinematic parameters of the drive were determined by the power loading during the working stroke and speed mode during the working cycle (forward (idle and working stroke) and reverse stroke). It is advisable to use a multi-stage drive with a smoothly increasing load over the entire length of the working stroke (upsetting, drawing operations). Analysis of the basic and additional combination of stages for linearly increasing power load, which was determined by the pressure at the beginning of Р0 , and the maximum pressure at the end of the working stroke Рmax was carried out. In the basic version, a gear stage (idle stroke), pump stage and two multiplier stages (working stroke) are sequentially combined. With an additional combination, the reduction stage covers idle stroke and initial part of the working stroke. Analysis was carried out under the condition of equality of pressure and power of the pumps in stages and the condition of equality of direct stroke time of the compared drives. The ratio of pump capacities was estimated. Dependences of the main parameters of the developed drive, reduction and multiplication factors were obtained. With the accepted initial data, it is possible to reduce the pressure and power of the developed drive pumps (in comparison with the simple one) by 28 – 37 % with an additional combination of stages (increases with an increase of an idle stroke). It is lower for the basic combination by 5 – 9 % (reduction is greater at lower idle stroke values). The use of an additional combination is limited by the ratio P0/Pmax ≤ 0/4.

The paper presents a solution to reduce the generated power and to increase the efficiency of a hydraulic pump drive of the high-capacity press equipment applied at the metallurgical plants. We developed a multi-stage gear-multiplier pump hydraulic drive on the base of the blocked gear-multiplier. Plungers of all cylinders form a movable block, the cylinders—a fixed block. A combination of the output cylinders supplying fluid into the power cylinder provides the operating mode (reduction, multiplication) by switching a part of them to drain. We compare the four-stage drive with the three-stage gear-multiplier to a simple single-pump drive. The four-stage drive with two output cylinders provides the gear stage and two multiplier stages, the stage of supplying liquid to the power cylinder directly from the pumps (the pumping stage) being combined with them. The force loading during the working stroke and the speed mode during the working cycle—forward (idle and working) and reverse – govern the power and the kinematic drive parameters. Application of the multi-stage drive is appropriate under the smoothly increasing load over the entire working stroke (upsetting and draw-forming operations). We analyze the basic and additional stage combinations for the linearly increasing power load governed by the pressure at the beginning, P0, and the maximum pressure at the end of the working stroke, Pmax. In the basic version, a gear stage (idling), a pump stage, and two multiplier stages are sequentially combined (work stroke). At the additional combination, the gear stage covers the idling and the initial part of the working stroke. Under the conditions of the pressure and the pump power equality in each stage and equality of the forward stroke duration for the compared drives, we performed the analysis and estimated the ratio of the pump capacities. We obtain the dependences of the main parameters of the drive developed, as well as the reduction and the multiplication coefficients. At the initial data considered, it is possible to reduce the pressure and the power of the developed drive pumps (as compared to a simple one) by 28–37% (increasing with the idling stroke increase) by means of additional step combinations. For the basic combination—by 5–9% lower (more reduction at lower idling values). Application of the additional combination is limited by the ratio P0/Pmax ≤ 0/4.

The purpose of the study is to analyze the problem of the relationship between culture and sport through the development of a system of values. The research analyses the problems of the unity of sports and culture in modern society; the specifics of their unity and struggle; the influence of sports on the aesthetic abilities of a person, one's decency, morality, on social relations; comparison of sports with other social values and definitions of cultural values that are developed in the field of sports. The main problem was investigated in the work with methods of analysis and synthesis, which were used to study the origins of classical literature. Its systematization was based on the historical-retrospective principle. The methodology of the analysis includes implicitly the unity of dialectical, systemic, comparative approaches. The research results were accompanied by the achievement of the main requirements of the dialectical methodology, including the principles of transition from the abstract to the concrete, the unity of the historical and the logical, the cognitive-theoretical, and the socio-practical.

Purpose The purpose of the study is to show an improvement in resistance (permeability) and durability (residual strength) of modified wood compared to natural wood. Design/methodology/approach A relevance way to increase the durability and resistance of wood is processing with polymers. Novosibirsk State Technical University, Novosibirsk State University of Architecture and Civil Engineering (Sibstrin) and the Norilsk State Industrial Institute researched the resistance of elements of mine treatment plants made of wood modified with synthetic polymers. The study was carried out according to V.A. Kucherenko. Modification of such species as birch and pine can significantly increase wood resources by extending its service life and improving its physical and mechanical properties. Latex-organosilicon modifier was used as a modifier. Findings Latex clogs the capillaries of wood, preventing the penetration of aggressive solutions into it, and potassium methyl silicate interacts with hydrophilic OH groups, increasing the water-repellent properties of the surface of cells and wood capillaries. Originality/value The results of long-term and predictive tests of modified wood in aggressive environments of treatment facilities are presented. As a result, diffusion of aggressive media into the wood becomes more difficult and its resistance and durability increase.

The article analyzes the properties changes of non-autoclave foam on a protein foaming agent with the introduction of dispersed wollastonite and diopside. A decrease in the density of foam concrete (to the grade D300, D400), frost resistance of the material, as well as shrinkage deformations was noted. The optimal technological parameters have been determined, allowing to obtain more stable properties and structure of heat-insulating cement-ash non-autoclave foam concrete. The flow chart of the production of foam concrete of natural hardening in the separate preparation of foam and mortar is presented. The studies were performed at NSTU and NGASU (Novosibirsk) and the NII (Norilsk).

Transformations that occur under heating in the structure of high-manganese steel 110G13L are studied. The carbon content in the steel is shown to affect the optimum temperature of heating the high-manganese castings for quenching. An empirical formula for determining the total duration of heating and holding of this type of castings for quenching is obtained.

A brassboard of a downhole video probe for logging in rock masses surrounding underground mine workings, with possible data imaging, storage and archivation has been designed, manufactured and tested in the laboratory and in situ, in the conditions of mines of the Talnakh-Oktyabrsky copper-nickel ore deposit. The designated purpose of the probe is to evaluate the disturbed state of a rock mass.

An estimate is made for the effect exerted by the ratio of area of bearing elements formed in the mined-out space to area of overlying rock undermining on the development of geomechanical processes. Recommendations are made regarding the diagnostics and control of stress-strain state in mined massifs, as well as the sequence and technological schemes of stoping.