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Date submitted2023-08-02
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Date accepted2023-12-27
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Date published2024-04-25
Justification of the approaches to improve management strategy of the mining system based on the analysis of data on the mining of complex structural rock blocks
Long-term activity of mining enterprises causes the necessity to substantiate the strategies of management of the mining and technical system functioning in terms of improvement of ore quality control, which is determined by its change in the course of field development due to the priority development of the main reserves and, as a consequence, forced transition to the mining of complex structural rock blocks with a decrease in the recovery percentage, which is typical in case the ore component meets the requirements of the feasibility study in terms of grade at substandard capacity. In this case, it is possible to identify the recovery percentage and the potential for its increase by analyzing the long-term activity of the mining and industrial enterprise, namely, by analyzing the data of mining complex structural rock blocks with the subsequent establishment of the relationship between the primary data on mining and geological conditions and information on the quality of the mineral obtained from the technological equipment. Therefore, the purpose of the research was to substantiate the necessity of improving the management strategy of the mining-technical system functioning, which consists in the fact that on the basis of analyzing the mining data of complex structural rock blocks it is possible to determine the ore mass losses and their quantity and to lay the basis for the development of decisions on its extraction. For this purpose, the collected data on the mining of complex structural rock blocks, accounting the geological and industrial type of extracted ores, were considered in modeling the conditions and studying the parameters of technological processes, the implementation of which provides additional products. It was revealed that the ore mass from substandard thickness layers is delivered to the dumps, and ore mass losses have been estimated at 25-40 % per year. It is proved that determination of ore mass losses based on the analysis of data on mining of complex structural rock blocks, as well as timely solution of this issue can significantly increase the production efficiency of mining and technical system. Taking into account for the results obtained, the options for optimizing the production of the mining and engineering system were proposed.
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Date submitted2022-10-31
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Date accepted2023-03-02
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Date published2023-12-25
Lightweight ash-based concrete production as a promising way of technogenic product utilization (on the example of sewage treatment waste)
- Authors:
- Tatyana E. Litvinova
- Denis V. Suchkov
The study is devoted to the development of a method for the technogenic raw materials utilization. Special attention is paid to the prospect of involving products based on them in the production of new building materials. The results of Russian and foreign studies on the reuse of wastes, such as phosphogypsum, metallurgical slag, waste from municipal and industrial wastewater treatment, etc., in the building materials industry are considered. It has been established that the use of incinerated sewage sludge ash in construction is a promising direction in terms of environmental and economic efficiency. The research confirmed the compliance of the lightweight ash-based concrete components to the regulatory documentation requirements for a number of indicators. As a result of the research, the composition of the raw mixture for the lightweight concrete production with incinerated sewage sludge ash as a replacement for a part of the cement has been developed. In terms of parameters, the developed concrete corresponds to standard lightweight concrete, marked in accordance with the regulatory documents of the Russian Federation as D1300 (density not less than 1.3 g/cm3), Btb2 (flexural strength not less than 2 MPa), M200/B15 (compressive strength not less than 15 MPa). Lightweight ash-based concrete is suitable for use in construction, repair of roads and improvement of urban areas.
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Date submitted2016-09-08
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Date accepted2016-11-18
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Date published2017-02-22
Plume tectonics – myth or reality?
- Authors:
- Yu. I. Daragan-Sushchov
The paper is dedicated to the role of mantle plumes in the formation of large igneous provinces. From different regions of the world facts are mentioned that contradict key points of plume tectonics. Closer attention is paid to classical volcanic provinces on Hawaiian islands and in Iceland, as well as to Siberian and Deccan Traps, oceanic plateau Ontong Java, Central Atlantic magmatic province, Alfa and Mendeleev Ridges in the Arctic Ocean. A conclusion is drawn that plumes are a special case of mantle-lithospheric flows, which according to deep geophysics are often located horizontally which leaves out their plume origin. Heated masses of mantle substance under young volcanic regions or rift zones of mid-ocean ridges do not emerge from the depth in the form of a straight column, but rather have arbitrary shapes, skewing to the sides and having outgrowths, offshoots, spherical bulges. Vertically rising flows of hot magma (plumes) are not a cause, but an effect of a lithospheric split and rise of magmatic substance due to decompression. A conclusion is made that it is unproductive to exaggerate the shapes and sizes of plumes and use them to explain all the diversity of endogenous processes.
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Date submitted2009-08-07
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Date accepted2009-10-14
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Date published2010-02-01
Calculation of material streams of the pirometallurgical cycle of processing of copper sulphidic raw materials
- Authors:
- N. V. Danilova
The technology pirometallurgical a cycle of processing of copper sulphidic materials is considered. The technology includes autogenous fusion in furnaces Vanjukova, converting copper steins and copper refinement. The primary goals of drawing up of model and the accepted assumptions are described. The equations of system of model are balance expressions for each of material streams. Expressions for calculation of material streams pirometallurgical a cycle of processing of copper sulphidic raw materials are found.
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Date submitted2008-11-26
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Date accepted2009-01-21
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Date published2009-12-11
Estimate of efficiency using material resources ore-dressing enterprise
- Authors:
- V. P. Scobelina
- O. S. Kogan
There is studied the activities system to estimate the efficiency of the material resource using effectiveness at a ore mining and processing enterprise, for instance OJSC “Apatit”. The activities were calculated as a part of the industrial and economic activity financial result analysis for a three year period. The activity study demonstrated that the extensive type of the material resources growth is typical for this enterprise with an unpractical use of the material stuff. As the material resource use efficiency criterion there is selected the most resumptive parameter, the profit per ruble of the material expenses. It is offered for this parameter analysis per factor.
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Date submitted2008-11-14
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Date accepted2009-01-04
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Date published2009-12-11
Intangible assets are the most important reserve for efficiency upgrading of enterprises engaged in the field of mineral resources utilization
- Authors:
- E. A. Shelkov
The role of intangible assets in activities of enterprises engaged in the field of this country’s mineral resources utilization is considered. Their insignificant specific weight in assets is pointed out as well as their slight reactivation in economic turnover and respectively in drawing of profit by domestic enterprises of Mineral and Raw Materials Complex. Basic reasons of the fact why at present intangible assets are one of little used reserves for increasing efficiency of enterprises carrying out activities in the field of mineral resources utilization are analyzed. Principal directions of intangible assets of MRMC enterprises record keeping, evaluation and use are suggested on the basis of gained world experience.