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Geotechnical Engineering and Engineering Geology
  • Date submitted
    2023-08-02
  • Date accepted
    2023-12-27
  • Date published
    2024-04-25

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

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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.

How to cite: Tsupkina M.V., Kirkov A.E., Klebanov D.A., Radchenko D.N. 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 // Journal of Mining Institute. 2024. Vol. 266 . p. 316-325. EDN JOLUPJ
Electromechanics and mechanical engineering
  • Date submitted
    2020-10-05
  • Date accepted
    2021-03-30
  • Date published
    2021-06-24

Improving the efficiency of relay protection at a mining and processing plant

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The paper presents the results of constructing effective relay protection in the power supply system of a mining and processing plant (MPP). A brief description of the MPP is given, the power supply and substitution circuits used to calculate the short-circuit currents are given. A statistical analysis of failures in the electric network of the MPP has been carried out, which makes it possible to draw conclusions about the nature of failures ranges. Analysis of the registered faults shows that a significant part of them are line-to-earth faults, which in most cases turn into multiphase short circuits, which are interrupted by overcurrent protection. In order to improve the efficiency and reliability of the relay protection, the power supply scheme of the MPP was refined and analyzed. The calculation of the short-circuit currents was made, which made it possible to calculate the settings of the relay protection and give recommendations on the place of its installation and adjustment in order to ensure the normal operation of electricity consumers. To reduce the number of failures to the cable insert on the line leaving the administrative and household complex (AHC), and to increase the reliability of power supply to consumers, it is advisable to divide the capacities of the existing 10 kV line into two parallel ones by laying a second line. It is recommended to install a current cut-off on the line outgoing to the AHC, the feasibility of the installation of which was shown by calculations. This will reduce the chance of failures to the cable gland. Data on the setting currents of overcurrent protection and current cut-off are given on the selectivity card.

How to cite: Klyuev R.V., Bosikov I.I., Gavrina O.A. Improving the efficiency of relay protection at a mining and processing plant // Journal of Mining Institute. 2021. Vol. 248 . p. 300-311. DOI: 10.31897/PMI.2021.2.14
Geology
  • Date submitted
    2016-09-08
  • Date accepted
    2016-11-18
  • Date published
    2017-02-22

Plume tectonics – myth or reality?

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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.

How to cite: Daragan-Sushchov Y.I. Plume tectonics – myth or reality? // Journal of Mining Institute. 2017. Vol. 223 . p. 3-8. DOI: 10.18454/PMI.2017.1.3
Geology
  • Date submitted
    2015-12-29
  • Date accepted
    2016-02-21
  • Date published
    2016-12-23

Poorly studied phenomena in geoelectrics

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Undoubtedly, modern geoelectric technologies emerge in the result of the development of traditional approaches and techniques. However of more interest is the appearance of completely new technologies based on new effects and new models of interaction of geological medium and electromagnetic field. The author does not commit to indicate principally new directions, but only wants to discuss some poorly known facts from the theory and practice of geoelectrics. The outcome of this study could be considered attracting the attention of experts to non-traditional signals in geoelectrics. The reviewed phenomena of interest, not fully implemented in practice in the author’s opinion, are field split into two polarizations: transverse electric (the ТЕ-field) and transverse magnetic (the ТМ-field), then some poorly known properties of ТМ-field, the role of bias currents, the anisotropy of horizontal resistances, the role of geomagnetic field in geoelectric sounding, the unique resolution of CSEM (Controlled Source Electro-Magnetic) techniques at sea.

How to cite: Mogilatov V.S. Poorly studied phenomena in geoelectrics // Journal of Mining Institute. 2016. Vol. 222 . p. 783-788. DOI: 10.18454/PMI.2016.6.783
Geotechnology for development of solid mining fields
  • Date submitted
    2013-07-13
  • Date accepted
    2013-09-03
  • Date published
    2014-03-17

Technology options for the preparation of new horizons

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The paper considers the advantages and disadvantages of technological options for the training of new horizons in the fields of mineral resources with large water production using excavators such as direct and backhoes.

How to cite: Kholodnyakov G.A., Ligotskii D.N. Technology options for the preparation of new horizons // Journal of Mining Institute. 2014. Vol. 207 . p. 81-83.
Metallurgy
  • Date submitted
    2009-08-07
  • Date accepted
    2009-10-14
  • Date published
    2010-02-01

Calculation of material streams of the pirometallurgical cycle of processing of copper sulphidic raw materials

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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.

How to cite: Danilova N.V. Calculation of material streams of the pirometallurgical cycle of processing of copper sulphidic raw materials // Journal of Mining Institute. 2010. Vol. 186 . p. 176-180.