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.

scholarly journals Replacement of traditional components of the backfill mixture with man-made waste

2021 ◽  
Vol 942 (1) ◽  
pp. 012005
Author(s):  
A Khayrutdinov ◽  
I Paleev ◽  
S Artemov
Keyword(s):  
Water Soluble ◽  
Raw Material ◽  
Material Base ◽  
Mining Areas ◽  
Global Environmental ◽  
Technological Chain ◽  
Cement Binder ◽  
Separate Activation ◽  
The Impact

Abstract The formation and storage of man-made waste of water-soluble ores creates a global environmental problem that entails changing landscapes in mining areas and environmental degradation. The involvement of man-made waste in a closed cycle of the production and technological chain makes it possible to reduce the impact of mining and processing on the environment. The use of non-waste (low-waste) technologies, in addition to reducing the environmental burden, allows you to expand the raw material base of the enterprise by replacing the traditional components of the backfill mixture with man-made waste from mining and processing enterprises. The possibility of replacing the traditional, specially extracted aggregate in the backfill mixture with industrial waste of water-soluble ores is experimentally proved. The possibility of creating a cementless backfill mixture is proved. The possibility of replacing the cement binder with magnesium-containing slags of the Chusovsky Metallurgical Plant was confirmed. It was found that the separate activation treatment of the components of the backfill mixture has a positive effect on its rheological properties and increases the strength of the joint mass. The use of lignosulfonate improves the quality of the mixture and the resulting mass. The development of a backfill composite from man-made waste makes it possible to implement the principle of organizing mining production, which provides for the use of intermediate products in cyclic production and excludes the formation of man-made waste of water-soluble ores.

scholarly journals The challenges of Industry 4.0 and the need for new answers in the mining industry

2021 ◽  
pp. 154-166
Author(s):  
VELIKANOV Vladimir Semenovich ◽  
Keyword(s):  
Industry 4.0 ◽  
System Analysis ◽  
Mining Industry ◽  
Operating Conditions ◽  
Raw Material ◽  
Open Pit ◽  
Open Pit Mining ◽  
Mining Equipment ◽  
Mining Operations ◽  
Technical Requirements

Relevance of the work is due to the need for further modernization of the economy of the Russian Federation, which involves solving both basic theoretical and applied problems of the domestic mining industry. This circumstance largely determines not only the state of the state’s production resources, but also its scientific and technical potential. The global trend in the development of mining operations in the world is mainly determined by open pit mining of raw material resources. Open pit mining is characterized by an increase in the volume of processed rock mass, improved production processes through the use of advanced technologies, which entails the use of high-capacity mining machines. The main problems of open-cut mining are the following: complex mining and geological and mining-technical conditions; depletion of the mineral resource base; and constantly changing environmental conditions. All this leads to an increase in the cost of mining and a decrease in the competitiveness of the products of mining companies. Objective of the work. To establish the need to modernize traditional technologies in open pit mining with the possibility of integrating the main ideas of Industry 4.0. Research methodology. When solving the set tasks a complex approach was used, including: scientific analysis and synthesis of previously published research, analytical studies, laboratory experiment and observations of the work of open-pit excavators in real operating conditions. The methods of mathematical statistics include system analysis and modeling with the use of information technologies form the methodological basis of the research. Results. This paper deals with the issues of modelling the cab of a quarry crawler excavator to meet the technical requirements for the excavator cab in protecting against tipping and rock impacts. Model setup and analysis of simulation results after loading are performed using Autodesk Inventor software. An optimal finite-element model of an excavator operator’s cabin has been developed to assess the effectiveness of its structural protection. Conclusions. Implementing the core ideas of Industry 4.0 is a complex scientific and technical challenge. Its solution is connected with significant economic costs, including modernization of mining equipment, infrastructure, as well as changes in the technology of open-cast mining. The implementation of complex automated control systems and practical application of the latest information and geoinformation technologies will unambiguously give high estimated figures and have high applied potential, and ultimately ensure safety of open pit mining, increase of efficiency and productivity, possibility of mining in regions with complex mining and geological and mining-technical conditions.

scholarly journals Non-Linear Regression Modelling to Estimate the Global Warming Potential of a Newspaper

Entropy ◽  
2020 ◽  
Vol 22 (5) ◽  
pp. 590
Author(s):  
Alexis Lozano ◽  
Pedro Cabrera ◽  
Ana M. Blanco-Marigorta
Keyword(s):  
Linear Regression ◽  
Environmental Sustainability ◽  
Regression Models ◽  
Raw Materials ◽  
Operating Conditions ◽  
Raw Material ◽  
Linear Regression Models ◽  
Daily Production ◽  
Non Linear ◽  
The Impact

Technological innovations are not enough by themselves to achieve social and environmental sustainability in companies. Sustainable development aims to determine the environmental impact of a product and the hidden price of products and services through the concept of radical transparency. This means that companies should show and disclose the impact on the environment of any good or service. This way, the consumer can choose in a transparent manner, not only for the price. The use of the eco-label as a European eco-label, which bases its criteria on life cycle assessment, could provide an indicator of corporate social responsibility for a given product. However, it does not give a full guarantee that the product was obtained in a sustainable manner. The aim of this work is to provide a way of calculating the value of the environmental impacts of an industrial product, under different operating conditions, so that each company can provide detailed information on the impacts of its products, information that can form part of its "green product sheet". As a case study, the daily production of a newspaper, printed by coldset, has been chosen. Each process involved in production was configured with raw material and energy consumption information from production plants, manufacturer data and existing databases. Four non-linear regression models have been trained to estimate the impact of a newspaper’s circulation from five input variables (pages, grammage, height, paper type, and print run) with 5508 data samples each. These non-linear regression models were trained using the Levenberg–Marquardt nonlinear least squares algorithm. The mean absolute percentage errors (MAPE) obtained by all the non-linear regression models tested were less than 5%. Through the proposed correlations, it is possible to obtain a score that reports on the impact of the product for different operating conditions and several types of raw materials. Ecolabelling can be further developed by incorporating a scoring system for the impact caused by the product or process, using a standardised impact methodology.

scholarly journals Issue of Accumulation and Redistribution of Oil and Gas Rental Income in the Context of Exhaustible Natural Resources in Arctic Zone of Russian Federation

2020 ◽  
Vol 8 (12) ◽  
pp. 1006
Author(s):  
Natalia Kirsanova ◽  
Olga Lenkovets ◽  
Muhammad Hafeez
Keyword(s):  
Economic Development ◽  
Russian Federation ◽  
Oil And Gas ◽  
Income Redistribution ◽  
Raw Material ◽  
The Arctic ◽  
Material Base ◽  
Arctic Zone ◽  
Socio Economic Development ◽  
The Impact

The significant resource potential of the Arctic has attracted the attention of its adjacent countries and extra-regional states. The mineral and raw material base of the Arctic Zone of the Russian Federation (AZRF) comprises a wide range of minerals. However, due to its hydrocarbon reserves, the Arctic is considered to be the most important geopolitical and geo-economic macro-region for Russia. A significant portion of the Arctic hydrocarbons (about 19%) is concentrated in the territory of Russia’s shelf. The extraction of Arctic marine oil and gas resources and ensuring the sustainability of the Russian energy complex depend significantly on the level of Arctic development. Thus, the pace and quality of the development of AZRF are strategically important to ensure the national interests of the country. It has been proven that the implementation of the state program for AZRF development and strategic plans of the largest companies operating in the region consolidate the raw material nature of AZRF development. Rent becomes the main form of income. This article addresses the main directions of the region’s development and the factors that prevent a high level of industrialization, which increase attention to the withdrawal and redistribution of rental income. The article considers the Russian and foreign experiences of withdrawal and redistribution of oil and gas rental income, and analyzes the level of socio-economic development of AZRF. The authors suggest a methodology for assessing the impact of a country’s area and population size on the ability to achieve a high income due to hydrocarbons. The authors also explain the principles of rental income redistribution in the region as a basis for improving the level of AZRF’s socio-economic development and as a condition for transition from the “colonial model” of development to the “sustainable development” model. The study results can be used to elaborate a mechanism for rental income redistribution in AZRF and state programs for the region’s development.

scholarly journals Prospects for resuming the underground development of magnetite quartzites in Ukraine, mining, technological and economic aspects

2018 ◽  
pp. 45-52
Author(s):  
S.O. Popov ◽  
V.M. Sidor ◽  
V.A. Novik
Keyword(s):  
Economic Efficiency ◽  
Iron Ore ◽  
Underground Mining ◽  
Mining Industry ◽  
Operating Conditions ◽  
Raw Material ◽  
Material Base ◽  
Economic Aspects ◽  
Mining Operations ◽  
Magnetite Quartzite

Purpose. Substantiation of expediency and prospects for resuming the development of magnetite quartzites by underground method in Ukraine. Methodology. Analysis of literature sources, project documentation and practical data that contain information on the current state and conditions for the development of iron ore in Ukraine, as well as data on varieties and state of reserves of different types of these ores. Findings. The problem, faced by domestic iron ore mining enterprises in connection with reaching the large depths of mining operations and the emergence of a shortage of raw material resources, is described. The volumes of magnetite quartzites, which are contained in the dormant mines, operating mines, and those mines of Ukraine that are not currently in operation, are determined. The expediency and directions for resuming the development of these ores, as well as expanding the raw material base of the domestic iron ore mining industry, are justified. Originalty. The principal approaches to the implementation at a modern technological and technical level of the cyclic-flow underground mining technology for the development of magnetite quartzite reserves, which is capable of ensuring the economic efficiency of their extraction at depths where the open method of their development becomes unprofitable, are expanded. Practical value. Ensuring the economic efficiency of underground development of magnetite quartzite reserves in operating conditions of the iron ore mining enterprises of Ukraine leads to a significant expansion of their raw material base, which is currently constantly decreasing, as well as support of the production capacity of these enterprises for a long period of time, and allows Ukraine to remain one of the leaders in the iron ore mining industry in the world. Key words: prospects, underground mining, magnetite quartzites, mining, technological, economic aspects.

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 Justification of the method of determination of the border overburden ratio

2020 ◽  
Vol 166 ◽  
pp. 02005
Author(s):  
Serhii Joukov ◽  
Serhii Lutsenko ◽  
Yulian Hryhoriev ◽  
Maxim Martyniuk ◽  
Volodymyr Peregudov
Keyword(s):  
Iron Ore ◽  
World Market ◽  
Raw Material ◽  
Open Pit ◽  
Processing Plant ◽  
Material Base ◽  
Opencast Mining ◽  
World Markets ◽  
The World ◽  
The Impact

The economic efficiency of the enterprise and the length of its operation, the full utilization of mineral reserves and the total cost of operation depend on the selected depth and boundaries of opencast mining. In such conditions of the deposits’ development it is necessary to evaluate the capabilities of the raw material base for the further development of the mining enterprise. The basis for determining of the border overburden ratio is on the condition that the price of manufactured marketable output of the designed enterprise should not exceed the price of the same marketable output in the world market. The realization of this condition is achieved analytically. This takes into account the impact of the rate of return on the final depth of the designed open pit. A new method of determining of the border overburden ratio is developed, which ensures the competitiveness of iron ore concentrate in the world market. The value of the border overburden ratio is developed for the Pershotravnevij open pit of the Northern mining and processing plant, depending on the situation of the iron-containing products’ prices, which ensures the competitiveness of marketable iron-ore output in the domestic and world markets.

scholarly journals Implementation of Contact-Condensation Hardening Theory Mechanisms when Forming Building Composites

2020 ◽  
Vol 24 (1) ◽  
pp. 90-102
Author(s):  
M. P. Stepanova ◽  
O. A. Sotnikova
Keyword(s):  
Composite Material ◽  
Composite Materials ◽  
Structure Formation ◽  
Building Materials ◽  
Raw Materials ◽  
Raw Material ◽  
Material Base ◽  
Resource Saving ◽  
The Impact ◽  
Contact Condensation

Purpose of research is to study cheaper composite materials for building structures such as cement-free ones without heat treatment, which will undoubtedly allow finding their application in building industry. To achieve this goal it is necessary to identify patterns of structure formation of clinker-free contact condensation hardening composite materials in which portlandite crystals act as a matrix, and the physicochemical active component of natural origin acts as a filler.Methods. In accordance with the purpose set, one of the main tasks of the work was to be solved; it involved study-ing the patterns of structure formation of contact-condensation hardening systems relying on the basic principles of materials science, which include studying the influence of the composition, structure and state of the starting com-ponents on the properties of a composite material. In this work, we studied the role of the physicochemical activity of raw materials and the possibility of ‘combining’ a portlandite matrix with filling mechano-physicochemical active raw materials capable of producing new structures. To form the composite material, a compaction pressing technique at elevated specific pressures was used, which made it possible to implement the mechanisms of contact condensation technology of structure formation. The formation of physicochemical bonds of portlandite and aluminosilicate filler of various types is also possible with certain ratios of their mass fractions and V/I ratios the optimization of which was one of our objectives.Results. The result of this work is to assess the impact of raw material characteristics and technology parameters on the properties of the resulting material, namely, the improvement of the compacting pressure and the amount of filler when getting a compacted composite.Conclusion. The development of a technology of producing clinker-free contact condensation composites based on portlandite with aluminosilicate filler will expand the raw material base of local building materials, reduce their cost and energy consumption, that is, solve key issues of resource saving in the building materials production.

scholarly journals Energy efficiency: a necessity or an end in itself?

2020 ◽  
Keyword(s):  
Energy Efficiency ◽  
Natural Gas ◽  
Nuclear Energy ◽  
Energy Intensity ◽  
Energy Resources ◽  
Raw Material ◽  
Multiple Regression Equation ◽  
Simultaneous Increase ◽  
Material Base ◽  
The Impact

The article considers the issues of ensuring energy efficiency from the standpoint of reducing the energy intensity of Ukraine’s GDP. The purpose of the article is to study the impact of the consumption of various types of fuel and energy resources on the formation of the nominal value of Ukraine’s GDP, taking into account national characteristics, the level of economic development and the availability of its own raw material base, as well as providing the economic basis for the country's independence and the welfare of the population. The task is to study the dependence of the nominal GDP on the consumption of various types of fuel and energy resources. The results were obtained: it was found that having enough coal and nuclear energy among the fuel and energy resources, the national economy of Ukraine is very dependent on oil and natural gas exports. The supply of these energy resources is carried out mainly from Russia or through intermediaries to other countries, which does not fundamentally change the origin of these energy resources. The lack of diversification of sources of fuel and energy resources threatens the country's energy security and independence. An analytical dependence of the nominal GDP on the consumption of various types of fuel and energy resources is obtained, which is described by the multiple regression equation and is adequate by the criteria of mathematical statistics. Conclusions: the resulting equation indicates that Ukraine’s GDP is directly proportional to the consumption of coal and nuclear energy and inversely proportional to the consumption of oil, oil products and natural gas. The solution to the problem of reducing the energy intensity of GDP should be carried out with a simultaneous increase in GDP, and not just a decrease in the consumption of fuel and energy resources. Downloads

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.

Sign in / Sign up

Export Citation Format

Share Document