scholarly journals Experimental research on the formation of mineral-rich areas in residue gold placer deposits

2018 ◽  
Vol 56 ◽  
pp. 03023 ◽  
Author(s):  
Vladimir Alexeev ◽  
Tamara Banshchikova
Keyword(s):  
Rock Mass ◽  
Large Scale ◽  
Gold Mining ◽  
Economic Consequences ◽  
Raw Material ◽  
Material Base ◽  
Deep Processing ◽  
Gold Placer ◽  
Gold Particles ◽  
Placer Deposits

Underestimation of the reserves of raw material base of gold mining (namely residue dump complexes) leads to negative social and economic consequences in the regions engaged in placer gold mining. Nonetheless, their efficient development is possible only through the use of new rational technologies of preparation and deep processing of rock mass for subsequent extraction of valuable minerals. In order to create such a technology, large-scale research was made on the nature and degree of the influence that the basic factors of the technology have on the process of migration and concentration of gold particles in a residue rock mass.

scholarly journals From placer deposits to technogenic mineral formations: resource and historical perspective (a study of Amur region)

2020 ◽  
Vol 192 ◽  
pp. 01032
Author(s):  
Gadzhi Mirzekhanov ◽  
Zoia Mirzekhanova
Keyword(s):  
Gold Mining ◽  
Historical Perspective ◽  
Amur Region ◽  
Raw Material ◽  
Upward Trend ◽  
Gold Placer ◽  
Alluvial Deposits ◽  
Mining History ◽  
Placer Deposits ◽  
Mineral Reserve

Attention to mined gold placers as sources of mineral reserve base replenishment is constantly increasing. We conducted an analysis of the field mining ratio regarding the 170-year period of gold mining history in the region, which is roughly divided into four stages, using the example of gold placer clusters in the Amur region. Each stage has its own peculiarities that determine the nature and methods of alluvial deposits development and the amount of raw material losses. It’s shown that previously mined placers within the studied area are being developed continuously. The technogenic complex gets involved into operation almost immediately after mining the undeveloped placer. The obtained results confirm the fact that the indicator of demand for technogenic objects continuously increases with the upward trend from 64% during the first stage to 80% at present.

scholarly journals The selection of technological basis of deep processing of coal.

2021 ◽  
Vol 4 ◽  
pp. 15-21
Author(s):  
M.O. Gordienko
Keyword(s):  
Melting Point ◽  
Environmental Safety ◽  
Coke Production ◽  
Raw Material ◽  
State Enterprise ◽  
Material Base ◽  
Deep Processing ◽  
Technological Basis ◽  
Thermochemical Processing ◽  
Selection Of

THE SELECTION OF TECHNOLOGICAL BASIS OF DEEP PROCESSING OF COAL © M.O. Gordienko (State Enterprise "Ukrainian State Research Coal Chemical Institute (UHIN)", 61023, Kharkov, Vesnina st., 7, Ukraine) The article is devoted to the analysis of the possibility of expanding the raw material base of thermal energy, as well as meeting the demand for motor fuels and chemical products through the thermochemical processing of coal, the reserves of which are large enough and available for extraction and transportation. Moreover, in contrast to technologies such as methanization and liquefaction, the most promising type of deep processing of coal seems to be its gasification. This process is carried out in sealed devices of high power according to the technologies that have a long history of improvement on an industrial scale by the world's leading companies. It was emphasized that Ukraine has significant reserves of low-calorie coal (constantly expanding due to waste of coal preparation), the thermochemical processing of which can significantly expand the domestic energy base. The basic principles of classification and technological foundations of existing industrial and industrial research installations for gasification of coal and similar materials are given. The basic diagrams and main parameters of the existing installations, which carry out the gasification process at temperatures below the melting point of the mineral (ash-forming) components of the raw material, are described - Sasol Lurgi and SES Gasification Technology (SGT). Based on the data on the world experience in the operation of thermochemical coal processing units, it is shown that low-temperature (carried out at a temperature below the melting point of the mineral ashforming components) gasification of various types of non-coking coal with certain technological solutions can be no less effective than more complex and expensive high-temperature technologies. There are grounds for believing that the efficiency of gasification with ash removal in a solid state can be further increased by using some of the technological capabilities available in coke production. Keywords: brown coal, non-coking coals, thermochemical processing, gasification, efficiency, degree of carbon conversion, energy carriers, synthesis gas, environmental safety. Corresponding author M.O. Gordienko, е-mail: [email protected]

Experience of CAE Fidesys application in numerical geomechanical modelling of Zhdanovskoe deposit

2022 ◽  
pp. 94-98
Author(s):  
L.K. Miroshnikova ◽  
A.Yu. Mezentsev ◽  
G.A. Kadyralieva ◽  
M.A. Perepelkin
Keyword(s):  
Rock Mass ◽  
Large Scale ◽  
Strain State ◽  
Raw Material ◽  
Mining Method ◽  
Stress Strain ◽  
Stress Strain State ◽  
Ore Bodies ◽  
Sublevel Caving ◽  
Murmansk Region

The Zhdanovskoe copper-nickel sulfide ores deposit is located in the north-west of the Murmansk region and is a mineral raw material source for JSC «Kola MMC». The main mining method used is sublevel caving. In some areas, due to the complex shape of the ore bodies, the open stoping mining method is used which requires determining stable parameters of stopes and pillars. It is necessary to study the stress-strain state of the deposit to ensure safe mining conditions. One of the possible solutions is the modeling of the stress-strain state of rock mass using the finite element method, for example, CAE Fidesys, which is FEMbased software. The use of CAE Fidesys for solving geomechanics tasks allows creating models of individual excavation units to determine the stability of stopes and pillars, and large-scale models that include several ore bodies and areas of the host rock mass. The article considers solutions of both types of geomechanic tasks using CAE Fidesys for conditions of the Zhdanovskoe deposit.

scholarly journals The role of digital simulation in assessing and reassessing the potential of complex coal deposits

2020 ◽  
Vol 192 ◽  
pp. 03014
Author(s):  
Vladimir Gavrilov ◽  
Evgenii Khoiutanov ◽  
Natal’ya Nemova ◽  
Dmitrij Son
Keyword(s):  
Rock Mass ◽  
Mineral Content ◽  
Digital Simulation ◽  
Raw Material ◽  
Material Base ◽  
Coal Deposits ◽  
Selective Mining ◽  
External Conditions

The article addresses the increasing complexity of mined or prospective coal deposits. The paper analyses the role of digital simulation in operation assessment and reassessment of the potential of complex in structure coal deposits for more accurate understanding their investment attractiveness, reliability of knowledge on quantity and quality of the reserves. The article stresses the objective need to take into account the realities of the VUKA-world, when companies have to react rapidly to changing of external conditions by adapting organizational and technological measures as much as possible to the constantly overestimated potential of the raw material base. It is of note that reserves should be assessed in accordance with international requirements in the light of the increasing number of parameters for management. The complexity of the structure, the geomechanical heterogeneity of the rock mass, the mineral content of the impurities in the coal, its caking capacity, oxidation and enrichment are taken into account in the estimation. The paper presents the measures to increase the level of utilization of geological potential through the application of selective mining and the control of different quality coal streams in preparation for enrichment and during primary processing.

scholarly journals Topical issues of providing raw materials to woodworking industry enterprises in Ukraine

2018 ◽  
Vol 2 (2) ◽  
pp. 12-19 ◽  
Author(s):  
Igor Guzhva ◽  
Yevhen Ivanov
Keyword(s):  
Large Scale ◽  
Negative Impact ◽  
Raw Materials ◽  
Economic Modeling ◽  
Raw Material ◽  
Practical Implementation ◽  
Deep Processing ◽  
Wood Processing ◽  
Timber Products ◽  
Timber Market

Introduction. Woodworking industry splits into two main sectors – primary and deep processing of wood, which fundamentally differ from each other. While primary wood processing requires common timber assortments (usually coniferous) production of deep processing products – plywood, particleboards and fiberboards – needs valuable and scarce assortments of hardwood like alder or birch. Problems with access to valuable raw materials remain one of the key factors in the development of the Ukrainian woodworking industry for many years. Aim and tasks. The aim of the article is to identify main shortcomings of Ukrainian timber market that create the biggest obstacles for domestic deep wood processing business; and to propose legal and regulatory mechanisms for ensuring stable and priority access of woodworking enterprises to quality timber products. Research results. Woodworking industry development is constrained with smuggling of valuable hardwood assortments (birch and alder), which serve as raw material for the manufacture of veneer, plywood, fiberboard; as well as with large-scale exports of wood particles to Turkey. In addition, abolished State Forestry Agency’s Order #42 that obliged to distribute scarce hardwood assortments only among those businesses that have appropriate facilities for its rational consumption. This greatly enhanced risks to misuse rare wood varieties for the needs that can be met by consumption of less-quality or more widespread assortments. The results of economic modeling show that strengthening the negative tendencies with the access of domestic woodworking manufacturers to plywood raw materials will have a negative impact on all related industries, employment and the economy as a whole; Ukraine will increase raw material exports and imports of finished furniture and paper products produced from exported raw materials. Conclusions. In order to avoid a negative scenario in the deep wood processing industry, it is necessary to adopt the Law on the Timber Market built upon the principle of targeting access to technical and plywood raw materials. It’s also necessary to enact and guarantee the practical implementation on preserving Ukrainian forests and preventing the illegal export of unprocessed wood.

Evaluation of non-productive time when calculating pile-type dredge performance

2021 ◽  
pp. 120-126
Author(s):  
N.V. Murzin ◽  
F.V. Dudinskiy ◽  
B.L. Talgamer
Keyword(s):  
Operating Conditions ◽  
Raw Material ◽  
Material Base ◽  
Mining Equipment ◽  
Placer Deposits ◽  
Organizational Work ◽  
Pile Type ◽  
Technical Capacity ◽  
The Impact ◽  
Productive Time

The paper assesses the raw material base and prospects of the dredging method to develop placer deposits and justifies the necessity to enhance its efficiency, including the reduction of non-productive time of mining equipment. Specific features of dredging that cause technological non-productive time of the dredge are described and compared to mining with continuous bucket excavators. In order to analyze and assess the impact of non-productive time on the dredge performance, it is proposed to divide all time consumed into groups, identifying time losses associated directly with working on the front bank, time spent on operations between the dredging cycles and other downtime required for technical support of the dredge operation. The main types of work are described that are part of the technological cycle in dredging and therefore define non-productive time, as well as those classified as auxiliary and organizational work. The possibility of combining non-productive time related to some auxiliary work with non-productive time due to organizational reasons is assessed. A formula is proposed for determining the front bank coefficient which is used in calculation of the dredge's technical capacity. Organizational time losses are proposed to be taken into account as the dredge utilization factors, including those per day, month and year. Specific features that cause nonproductive time in mining of formations that contain oversized boulders are highlighted. For the accepted operating conditions of the dredge and the front bank parameters, a structure of time losses was determined by type of work and their quantitative assessment was made. The results of this assessment showed the dependence of the front bank coefficient on the width and the thickness of the pay zone. The results of comparing the calculated values of the front bank coefficient with production and specialist data are provided.

State and prospects of development of the raw material base for the production of zirconium materials in the Russian Federation

2020 ◽  
pp. 5-11
Author(s):  
V. A. Sokolov ◽  
E. V. Bogatyreva ◽  
M. D. Gasparyan
Keyword(s):  
Russian Federation ◽  
Zirconium Dioxide ◽  
Raw Materials ◽  
Raw Material ◽  
Material Base ◽  
Secondary Raw Materials ◽  
The World ◽  
Production And Distribution ◽  
Placer Deposits ◽  
The Russian Federation

Areas of application of zirconium, the main of which are metallurgy, the production of refractories and ceramics are given. The sources of production and distribution of reserves and resources of zirconium dioxide in Russia are indicated. It is noted that Russia, which occupies the fourth place in the world in terms of zirconium reserves, does not have any industrially developed deposits with zirconium production, and Russian consumers are fully working on imported raw materials. The possibility of ensuring the import independence of Russia in zirconium raw materials by commissioning their own explored placer deposits of zirconium and secondary raw materials is shown.

scholarly journals Economic Potential of Development of Inefficient Gold Alluvial Deposits of Zabaikalye Territory: Problems and Effective Directions of Local Economy Development

2018 ◽  
Vol 9 (4) ◽  
Author(s):  
Maria Latysheva ◽  
Alexander Shupletsov ◽  
Galina Davydova
Keyword(s):  
Gold Mining ◽  
Mining Industry ◽  
Assessment Method ◽  
Local Economy ◽  
Raw Material ◽  
Material Base ◽  
Gold Extraction ◽  
Mining Operations ◽  
Good Tool ◽  
Alluvial Deposits

The gold mining industry reveals negative trends: reduction of reserves, deterioration of the raw material base, growth of illegal gold extraction from off-balance alluvial deposits. A new group of gold placers called low-efficient can serve as a potential for developing the gold mining industry and the economy of Zabaikalye Territory. The article presents a developed organizational and economic mechanism of developing such placers, the basis of which is the principle of public-private partnership oriented toward exploiting the potential of labor, technological and natural resources of the Territory. The proposed mechanism has not previously existed in the practice of inefficient gold placers development. To assess the potential of such deposits, the article presents a developed technique based on the theory of fuzzy sets and methods of optimal, which allows to take into account the quality factors and to optimize the process of mining operations. The introduction of the mechanism and the assessment method in the Territorys placer deposits shows good results, which is an evidence for its use in the Zabaikalye Territory. The proposed mechanism is a good tool for developing the gold industry in general.

Budget as an Instrument of Reproduction of Bureaucracy in Russia

2006 ◽  
pp. 87-96
Author(s):  
Yu. Shvetsov
Keyword(s):  
The State ◽  
Economic Consequences ◽  
Material Base ◽  
Characteristic Features

The article considers the problem of bureaucratisation of the state and the most important social and economic consequences of this phenomenon. The essence of bureaucracy has been revealed, characteristic features of its functioning in Russia have been analyzed; the material base of bureaucracy and its dominating status in the society have been substantiated. The conclusion has been made that the process of changing the role of the budget to serve the interests of bureaucracy is being accomplished.

The interasin raw material base of coke-chemical production of Ukraine: Problems of charge formation, its preparation and coking

2018 ◽  
Vol 5 (6) ◽  
pp. 3-7 ◽  
Author(s):  
E.S. Popov ◽  
V.I. Gavrilyuk ◽  
N.V. Mukina ◽  
E.T. Kovalev ◽  
I.D. Drozdnik ◽  
...  
Keyword(s):  
Raw Material ◽  
Material Base ◽  
Chemical Production ◽  
Charge Formation
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