Development of complex-structure ore deposits by means of chamber systems under conditions of the Kryvyi Rih iron ore field

Pysmennyi, Serhii; Brovko, Dmytro; Shwager, Natalya; Kasatkina, Iryna; Paraniuk, Dmitriy; Serdiuk, Oleksandra

doi:10.15587/1729-4061.2018.142483

Cited by 25 publications

(22 citation statements)

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“…where h cr is thickness of the monolith crown, m; K dist is the factor considering disturbance of the crown resulted from mining, unit fraction [28][29][30][31].…”

Section: Methodsmentioning

confidence: 99%

The study of the stress-strain state of the massif in mining uranium at “VOSTGOK” deposits

et al. 2020

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Being one of the world's largest uranium producers(about 2% of the world's production), the state enterprise "Vostochnyi Mining and Processing Works" ("VostGOK") provides about 40% of Ukraine's nuclear power stations with uranium raw materials. Considering the conditions of uranium deposits exploitation (location in densely populated areas, protected sites etc.), to protect the environment from possible emissions of radioactive elements room mining is applied with subsequent backfilling of the dead area with consolidating mixtures. This technology is economically reasonable at deposits with the increased uranium content. To exclude a number of labour-consuming and environmentally dangerous operations from the production process, lean uranium-containing ores are reasonable to be mined applying underground block leaching. This enables reaching maximum values of mineral extraction and avoiding considerable material expenditures on backfilling mixture preparation and backfilling dead rooms, as they are almost completely backfilled with the muck pile, and on utilization of waste after the mined ore primary processing (barren rocks and off-balance ores) on the daylight surface.

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“…where h cr is thickness of the monolith crown, m; K dist is the factor considering disturbance of the crown resulted from mining, unit fraction [28][29][30][31].…”

Section: Methodsmentioning

confidence: 99%

The study of the stress-strain state of the massif in mining uranium at “VOSTGOK” deposits

et al. 2020

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“…The flowchart involves the following: the vertical shafts are deepened along with mining the underlying levels up to the depth that provides the required annual production of the underground mine according to formula (1). The lower opening is conducted by the second opening stage.…”

Section: Resultsmentioning

confidence: 99%

Annual production enhancement at deep mining

et al. 2019

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The article aims at determining possible annual production considering mining and technical capabilities of the underground mine. Deepening of mining operations at Kryvyi Rih iron ore basin reduces considerably annual production of the useful mineral which results in increased mining costs. To maintain annual production, it is reasonable to build the second stage of opening the depth of which depends on production volumes. When determining the optimal depth of the first stage opening, it is necessary to apply a complex research method including the graphoanalytical one for determining the underground mine’s annual production and the industrial one for adjusting the methods considering technical conditions of the enterprise. It has been determined that annual production is influenced not only by mining and geological but also by mining and technical conditions. It has been proved that annual production of an underground mine decreases in direct proportion to the increased depth of mining. The speed of skips in the shaft is greatly impacted by the length of the main opening and its operating life. With the increase of the shaft operating life the skip speed decreases from 12 to 6 – 8 m/s. When designing the flowchart of further opening of underlying levels, it is necessary to consider both mining capabilities and technical conditions of the shaft and headgear, mining depth and the main opening operating life as well as the strategy of the mining enterprise. Consideration of the above mentioned factors enables maintaining the required annual production when mining iron ores at great depths. Under conditions of Kryvyi Rih iron ore basin, it has been determined reasonable to apply the main vertical shaft flowchart when mining reserves to the depth of 1650 m.

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“…In underground construction geological and surveying tools are used, including [12][13][14][15][16][17][18][19][20]: -stress measurement in lining by strain gauges; -deformation measurement in lining by levelling ( fig. 1).…”

Section: Methodsmentioning

confidence: 99%

Study of rock structure properties during combined stopping and development headings

et al. 2020

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The purpose of this study is to establish the mechanism of interaction between stresses and strains and their quantitative values at the intersection of stopping and development headings to optimize methods for controlling the behaviour of the rock massif. The research complex includes priority methods with experimental confirmation of the calculated parameters by geophysical studies, including stress calculation by a sensor system and surveying levelling to measure deformations using support frames. The properties of the massif and the role of faults and macro-cracks in the development of a field of a complex structure are systematized. A method for studying the stresses and deformations of rocks at the intersection of stopping and development headings is given. The patterns of the rock massif behaviour at the point of intersection are established. The article provides quantitative values of changes in the physical and mechanical properties and stability of rocks at the point of intersection. Massif was differentiated according to the magnitude of the effective stresses in different phases of the intersection. Stresses for specific conditions were calculated with the determination of the reliability of the mining site. The patterns of change in stresses and strains in time are noted.

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Development of complex-structure ore deposits by means of chamber systems under conditions of the Kryvyi Rih iron ore field

Cited by 25 publications

References 0 publications

The study of the stress-strain state of the massif in mining uranium at “VOSTGOK” deposits

The study of the stress-strain state of the massif in mining uranium at “VOSTGOK” deposits

Annual production enhancement at deep mining

Study of rock structure properties during combined stopping and development headings

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