Methodology enhancement for determining parameters of room systems when mining uranium ore in the SE “SkhidGZK” underground mines, Ukraine

Stupnik, Mykola; Kalinichenko, Vsevolod; Fedko, Mykhailo; Pysmennyi, Serhii; Kalinichenko, Еlena N.; Pochtarev, Alexey

doi:10.33271/mining16.02.033

Cited by 9 publications

(12 citation statements)

References 22 publications

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“…At the first stage, before the ellipsoid of drawing reaches the inclined surface, the figure of drawing is formed according to previous studies [1,18,54].…”

Section: Methodsmentioning

confidence: 99%

“…As is seen from figure 1, mining operations are carried out below level -1350 m. The analysis of mining enterprises shows that physical and mechanical properties, the shape of occurrence, the dip angle and stability change depending on the mining depth. In mining blocks there occur inclusions of waste rocks with the horizontal thickness of 0.5-12.0 m [16][17][18][19][20].…”

Section: Introductionmentioning

confidence: 99%

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Enhancement of the technology of caved ore drawing from the ore deposit footwall “triangle”

Pysmennyi,

Chukharev,

Peremetchyk

et al. 2023

IOP Conf. Ser.: Earth Environ. Sci.

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In mining iron ore, over 60% of underground mines at Kryvyi Rih iron ore basin apply a system with the bulk caving of ore and overlying rocks. However, when the deposit dip is 45-60 degrees, application of this mining system leads to losses of about 30-40% of the footwall ore. Available methods of the loss reduction result in an increase in production costs or a decrease in the iron content in the mined ore mass. After analyzing the mechanism of forming the figure of drawing, it is proposed to change its parameters without significant costs due to the use of an inclined plane and an overcompacted ore layer. The presented study enables stating that with an increase in the inclined plane angle from 45 to 75 degrees the draw crater radius increases from 2 to 7.5 m, and a decrease in the factor of first loosening of ore leads to an increase in the radius of the crater to 10 m. Thus, for the first time it is proved that a decrease in the first loosening factor leads to the increased semi-minor axis of the ellipsoid of drawing and the width of the active drawing area, which will reduce losses of caved ore when drawing it from the stoping block in the footwall area. It is established that in order to minimize losses and dilution of ore when using level mining systems, the drawpoint should be located in the block sill at a distance ensuring formation of the 20 to 25 m high ellipsoid of drawing. In case of an overcompacted 22 m thick ore layer, it is possible to significantly reduce ore losses from 14 to 10% and ore dilution from 16 to 9%, thereby enhancing ore mass extraction indices without additional costs.

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“…At the first stage, before the ellipsoid of drawing reaches the inclined surface, the figure of drawing is formed according to previous studies [1,18,54].…”

Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Enhancement of the technology of caved ore drawing from the ore deposit footwall “triangle”

Pysmennyi,

Chukharev,

Peremetchyk

et al. 2023

IOP Conf. Ser.: Earth Environ. Sci.

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“…In this paper, SolidWorks 2015 software is used to determine the SSS of a rock massif related to the determination of the stress field [25].…”

Section: An Important Element Of Transition From Technologies Of Open...mentioning

confidence: 99%

Scientific and technical problems of transition from open pit to combined technologies for raw materials mining

Stupnik,

Kalinichenko,

Kalinichenko

et al. 2023

IOP Conf. Ser.: Earth Environ. Sci.

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In Kryvyi Rih iron ore basin, long-term and intensive mining of deposits applying open pit methods have resulted in significant areas disturbed by open pits, dumps and tailings storage facilities. Hundreds of thousands of hectares of fertile arable land are already unsuitable for agriculture and sometimes for living. Thousands of tonnes of dust from dumps and tailing ponds deteriorate the surrounding nature every year and pollute the atmosphere in mining basins. Industrial ore breaking in open pits using bulk blasting causes emissions of a significant amount of harmful dust and carcinogenic substances. The environmental situation in open pit mining areas is often close to critical. In addition, bulk blasting forms a seismic wave, which in some cases destruct civil buildings and industrial facilities. The article proposes ways of gradual transition from mining mineral deposits by open pit methods to environmentally friendly technologies of open pit-underground and underground mining. It is established that such transition is a forced and at the same time choiceless way of developing mining areas, in particular Kryvyi Rih iron ore basin. The paper notes that the main problems of this transition include geomechanical stabilization of the rock massif during construction of underground mines in areas of possible impacts of open pit fields. The paper develops the fundamental study of the problems of controlling the stress-strain state of the massif during transition from the open pit to combined technology of deposit mining. Technologies of combined mining that involve formation of a transition belt with backfilling the worked-out space with compound mixtures are studied as well. It is proved that development of theoretical foundations for controlling the stress-strain state of the massif during transition from the open-pit to combined technology of deposit mining, study and design of technological solutions that contribute to transition to open pit-underground and underground mining, is an urgent scientific, technical and practical problem of great importance.

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“…Kryvyi Rih iron ore deposit (Ukraine) is represented by narrow strips of metamorphic rocks stretching for about 100 km from south to north. In terms of stratigraphy, Kryvyi Rih series of rocks is divided into four formations: schist-amphibolite (K0), lower arkose-phyllite (K1), middle iron ore (K2) and upper schist (K3) ones [1][2][3][4][5]. The main productive thickness is the iron ore formation (K2) which consists of seven pairs (ferruginous and schistous horizon) of rocks alternating with each other.…”

Section: Introductionmentioning

confidence: 99%

“…In Kryvyi Rih iron ore basin, iron ore is mined by room mining systems and systems with bulk caving of ore and country rocks [12][13][14].…”

Section: Introductionmentioning

confidence: 99%

Rozwój technologii wydobywania rudy z niestabilnymi wiszącymi skałami

PYSMENNYI,

CHUKHAREV,

KOUROUMA

et al. 2023

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Kopalnie podziemne złoża rudy żelaza w Krzywym Rogu stosują systemy urabiania komorowego lub systemy z zawałem rudy i nadległych skał w stosunku 35% do 65%. Większość kopalń preferuje systemy eksploracji komorowej z zawałem filarowym ze względu na wysokie wskaźniki techniczne i ekonomiczne. Jednak podczas eksploatacji niektórych obszarów pojawia się problem ze stabilnością wiszących skał. W takich samych warunkach górniczo-geologicznych złoża stopnie na niektórych obszarach są stabilne, ale na innych skały płonne dostają się do stopu od strony wiszącej ściany, gdy powstaje niewielkie odsłonięcie. Dlatego też w warunkach niestabilnych skał wiszącej ściany pilnym zagadnieniem jest rozwój i doskonalenie technologii eksploatacji komorowej. Analiza badań ujawnia czynniki, które znacząco wpływają na stabilność wiszących skał i rudy. Opracowane metody umożliwiają wyznaczenie parametrów statecznościowych oraz zastosowanie udoskonalonego wariantu systemu eksploracji pomieszczenia w warunkach niestabilnej ściany wiszącej za pomocą filaru ochronnego rudy, znajdującego się przy niestabilnej ścianie wiszącej. Z przeprowadzonych obliczeń wynika, że zastosowanie proponowanego systemu urabiania umożliwia zwiększenie zawartości żelaza w wydobywanej masie rudy o 0,94%, zwiększenie ilości wydobywanej masy rudy oraz zysk w wysokości 18,73 tys. euro za cały blok.

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Methodology enhancement for determining parameters of room systems when mining uranium ore in the SE “SkhidGZK” underground mines, Ukraine

Cited by 9 publications

References 22 publications

Enhancement of the technology of caved ore drawing from the ore deposit footwall “triangle”

Enhancement of the technology of caved ore drawing from the ore deposit footwall “triangle”

Scientific and technical problems of transition from open pit to combined technologies for raw materials mining

Rozwój technologii wydobywania rudy z niestabilnymi wiszącymi skałami

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