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Date submitted2024-05-11
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Date accepted2025-01-28
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Date published2025-03-21
Research and development of technology for the construction of snow airfields for accommodating wheeled aircraft in Antarctica
- Authors:
- Sergey P. Polyakov
- Sergey V. Popov
Construction of a new wintering complex at the Antarctic Vostok Station required prompt delivery of builders and mechanics to Progress Station to move them further to the work area. To solve this major logistical issue, a new landing site, later named Zenit, certified for accommodating heavy wheeled aircraft, was prepared in the Progress Station area from March to August 2022. Its snow pavement slab with a total area of 350 thousand m2 is from 100 to 120 cm high. It was made by applying snow layers with their subsequent compaction by a specially designed compaction platform for snow airfields suitable for heavy wheeled aircraft. As a result, the pavement has a surface hardness of at least 1 MPa. The layer from 30 to 60 cm has a hardness of at least 0.8 MPa, and the bottom layer at least 0.6 MPa. The first Il-76TD-90VD aircraft of the Russian company Volga-Dnepr was accommodated to the new runway on 7 November 2022. The aircraft landed in normal mode. The depth of the chassis wheels track after landing did not exceed 3 cm. The research provided in-depth understanding of the mechanisms for forming the supporting base of the runway from snow and ice in Antarctica. The experience gained can be used to solve similar issues in the Far North.
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Date submitted2021-03-23
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Date accepted2022-01-24
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Date published2022-04-29
Justification of the technological scheme parameters for the development of flooded deposits of construction sand
- Authors:
- Vladimir V. Ivanov
- Denis O. Dzyurich
The article describes the main types of technological schemes for working out the flooded strata of sand deposits using hydraulic shovel excavators. The analysis of scientific and technical literature describing the experience of using hydraulic shovel excavators in the open-pit mining, including pits for the extraction of construction sand, has been carried out. The proposed technological scheme is that the development of reserves of the flooded strata without preliminary water reduction is carried out by a hydraulic shovel excavator from under water by a downward digging with the storage of the extracted rock mass in bulk (for dewatering), placed in such a way that when working out the next mining bench width, it is located within the working area of the excavator for simultaneous processing of the next bench width and loading of dewatered sand from the pile. Calculations of the parameters of the operating platform and the excavator block of the proposed technological scheme for conducting open-pit mining were carried out. The dependence for determining the minimum length of the mining operations front of an excavator for drawing up a technological scheme of operation of a backhoe hydraulic excavator on working out the flooded strata with the pile formation for dewatering sand and its subsequent uploading from the pile by the same excavator is presented.
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Date submitted2014-12-30
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Date accepted2015-02-03
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Date published2015-12-25
Open mining technique for unconventional mineral deposits
- Authors:
- G. A. Kholodnyakov
- K. R. Argimbaev
Nowadays the majority of deposits are successfully exploiting by mining enterprises with the help of traditional excavation and loading equipment. Typically, metals, construction materials, etc. are mined and extracted on these deposits, but modern society is progressing and producing new requirements to metals properties for creating a new type of equipment. The metals with new properties are located in unconventional areas: either in technogenic deposits (overburden dumps, tailings, etc.) or in hard-to-get natural formations. Technogenic mines, being a tailing of Kachkanarsky mining and processing plant, are referred to such unique deposits, which have expensive metals (scandium, gallium, strontium, titanium), as well as the natural deposit – rhenium deposit, located in the crater of an active volcano. Potentialities of open mining in the largest rhenium deposit with complex environmental occurrence have been analyzed in the paper. Temperature measurement results of adjacent strata and a temperature scheme of the host rocks on a separate site and the entire field have been presented. An open mining technique for a primary mining area as well as perspective methods of rock preparation for excavation, applicable to this particular deposit, has been considered.
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Date submitted2013-07-23
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Date accepted2013-09-09
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Date published2014-03-17
Quarry capacity of ore relation from bench height
- Authors:
- G. A. Kholodnyakov
- M. D. Abdullaev
The work evaluated the impact of the bench height on the development of mining operations and quarry capacity of ore. The analysis of the height of the step depends on the area of the ore deposit within the quarry field, as well as the dependence of the length of the scope of work on the angle of the ore body.
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Date submitted2013-07-18
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Date accepted2013-09-30
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Date published2014-03-17
Reducing environmental hazard drilling works
- Authors:
- M. M. Malyshkin
The problem of disposal of drilling waste is proposed to solve through the introduction of protective functions of the complex engineering activities, including, firstly, the application in the process of drilling mud through watersoluble biodegradable polymers and quadruple systems, cleaning fluid, and secondly, the application design platform with the wells trench in the body of the embankment site for pressed cuttings, which is arranged for a temporary earthen vessel for drilling wastewater.
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Date submitted2009-08-18
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Date accepted2009-10-10
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Date published2010-02-01
Increase of efficiency performance of complexes open-cut equipment
- Authors:
- A. A. Faul
At definition of benches height many features and factors are taken into consideration: conditions of burial and property of taken out rocks; necessary intensity of mining work; the planned schedule of strippings; demanded quality given out, from mineral opencast; parametres of drilling-and-blastings; working conditions of excavators and a condition of transportation of ore. The basic condition of correctly chosen bench height is its stability in the course of operation the opencast mine providing safety of conducting of mining operations.