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E. R. Kovalskii
E. R. Kovalskii
Natsional'nyi mineral'no-syr'evoi universitet «Gornyi»
Natsional'nyi mineral'no-syr'evoi universitet «Gornyi»

Articles

Geotechnical Engineering and Engineering Geology
  • Date submitted
    2021-04-19
  • Date accepted
    2022-05-25
  • Date published
    2022-07-13

Development of the technology of stowing the developed space during mining

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An analysis of the world experience in the development of potash deposits shows that the main problems arising during their development are a high level of mineral losses, an increased risk of flooding of mine workings as a result of water-proof layer discontinuance and the development of emergency water inflows in the mined-out spaces. Reduction of potash ore losses can be achieved by using a long-pillar mining system, but this method is limited by the peculiarities of the geological structure of the potash deposits and the need to preserve the continuity of the water-proof layer during its underworking. The safety of underworking of the water-proof layer can be improved by using the stowing of the developed longwall space. However, the question of the influence of the stowing on the height of the zone of water supply cracks development remains little-studied. The world experience of stowing the developed spaces in the development of layers with long pillars is analyzed and the technology of placing the stowing masses, which can solve these problems, is proposed. The considered technology and the proposed solutions are supported by laboratory tests of stowing materials and mathematical modeling of deformation zones in the overlying rocks.

How to cite: Kovalskii E.R., Gromtsev K.V. Development of the technology of stowing the developed space during mining // Journal of Mining Institute. 2022. Vol. 254. p. 202-209. DOI: 10.31897/PMI.2022.36
Geotechnology for development of solid mining fields
  • Date submitted
    2013-07-27
  • Date accepted
    2013-09-30
  • Date published
    2014-01-01

Influence of disjunctive dislocations on parameters of secure zones on flat-lying adjacent coal seams

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The article focuses influence of disjunctive dislocations on parameters of secure zones on flat-lying adjacent coal seams is considered.

How to cite: Zubov V.P., Kovalskii E.R., Nikiforov A.V. Influence of disjunctive dislocations on parameters of secure zones on flat-lying adjacent coal seams // Journal of Mining Institute. 2014. Vol. 207. p. 22.
Geotechnology for development of solid mining fields
  • Date submitted
    2013-07-28
  • Date accepted
    2013-09-27
  • Date published
    2014-01-01

The analysis of the stress-and-strain state in vicinity of mining excavations

Article preview

Estimation of the strain-and-stress state and displacement of the waterprotective layers in vicinity of mining excavations in conditions of SKRU-3 mine (Uralkali Group) is done. It is shown that loadings on pillars on layer Kr.II exceed 15-20 % loadings on layer AB.

How to cite: Sankovskii A.A., Kovalskii E.R. The analysis of the stress-and-strain state in vicinity of mining excavations // Journal of Mining Institute. 2014. Vol. 207. p. 63.
Topical issues in mining of ore and nonmetallic minerals
  • Date submitted
    2013-01-30
  • Date accepted
    2013-03-03
  • Date published
    2013-07-01

Estimation of pearameters of stress-and-strain state of rock mass in vicinity of a transport excavation

Article preview

An example of application of finite element method in rock mechanics is presented. Parameters of stress-and-strain state of rocks in vicinity of a shallow transport excavation are estimated. Some results of numerical modeling are presented.

How to cite: Kovalskii E.R., Mozer S.P., Medvedskov M.A. Estimation of pearameters of stress-and-strain state of rock mass in vicinity of a transport excavation // Journal of Mining Institute. 2013. Vol. 206. p. 78.
Geotechnology issues
  • Date submitted
    2012-12-21
  • Date accepted
    2013-02-11
  • Date published
    2013-06-01

Purposes of numerical experiment in rock mechanics

Article preview

Numerical experiment is characterized as one of the research methods in rock mechanics. Definition of the method is given. Specifics of rock mass as a research object are described.

How to cite: Kovalskii E.R. Purposes of numerical experiment in rock mechanics // Journal of Mining Institute. 2013. Vol. 205. p. 57.
Geotechnology
  • Date submitted
    2010-08-27
  • Date accepted
    2010-10-25
  • Date published
    2011-02-01

Development of tecnological shemes of the selective extraction of the complex potash seams under conditions of the starobin deposit

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Approaches to selection of technological mining schemes based on selective potash seam extraction are described. Progressive technological mining schemes for potash mining company «Belaruskaliy» and the geological conditions of the IV potash horizon are reviewed. Basic aspects of the geomechanical substantiation of parameters of technological mining schemes for conditions of the new potash horizon in the presence of influence of the overlying horizons are also presented. Guidelines for substantiation of progressive mining methods for the conditions of the IV potash horizon (Third Mine, «Belaruskaliy») are developed on the basis of the modeling of the stress-and-strain state of the rocks.

How to cite: Kovalev O.V., Kovalskii E.R., Sirenko Y.G., Tkhorikov I.Y. Development of tecnological shemes of the selective extraction of the complex potash seams under conditions of the starobin deposit // Journal of Mining Institute. 2011. Vol. 190. p. 16.
Mine survey
  • Date submitted
    2010-08-23
  • Date accepted
    2010-10-22
  • Date published
    2011-02-01

Some approaches to evaluate the stability of underground structures subjected to dynamic loads from earthquakes

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The scheme of approach of evaluation of the stability of underground structures with account for seismic activity of rock strata is introduced. Some aspects of estimation of stability of underground structures under dynamic loads are also present. Methods of choosing the safe parameters of underground mining with account for seismic and tectonic activity of rocks are shown.

How to cite: Kovalskii E.R., Mozer S.P., Mikhailenko O.V., Sidorenko S.A. Some approaches to evaluate the stability of underground structures subjected to dynamic loads from earthquakes // Journal of Mining Institute. 2011. Vol. 190. p. 330.
Mining
  • Date submitted
    2009-08-26
  • Date accepted
    2009-10-25
  • Date published
    2010-02-01

The improvement of selective extraction of thick potash seams mined with room and pillar mining method

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Technological scheme of selective extraction of a complex thick potash seam on the basis of cutting machine «Bucyrus Model 25 M0» is proposed. Stable pillars’ width and room dimensions are calculated. Economical effect is also presented.

How to cite: Sirenko Y.G., Brychkov M.Y., Kovalskii E.R. The improvement of selective extraction of thick potash seams mined with room and pillar mining method // Journal of Mining Institute. 2010. Vol. 186. p. 79.
Geotechnology
  • Date submitted
    2006-10-26
  • Date accepted
    2006-12-18
  • Date published
    2007-04-01

Justification of rational methods of opening and mining of IV horizon in conditions of Starobinskoe potassium salt deposit

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The article presents methodological approaches to justification of rational development and mining of a new potash horizon. The state of ore mines of Belaruskali, geological conditions of IV potash horizon, main aspects concerning geomechanical justification of development parameters are considered. Based on the analysis of the stress and deformation state of rock strata recommendations for the development of IV potash horizon at the Third mine ("Belaruskali") are given.

How to cite: Kovalskii E.R., Bondarev K.A. Justification of rational methods of opening and mining of IV horizon in conditions of Starobinskoe potassium salt deposit // Journal of Mining Institute. 2007. Vol. 172. p. 103-108.
Modern problems of geomechanics and geotechnology
  • Date submitted
    2003-06-09
  • Date accepted
    2003-07-07
  • Date published
    2004-01-01

Geomechanical substantiation of parameters for potash ore follow-up extraction from pillars using a drill auger excavation

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On the example of Starobinskoye deposit the criteria determining the choice of development systems and possible ways to increase the extraction of potassium reservoirs are considered. Different principal schemes of sylvinite extraction from pillars by auger drilling technology are proposed. The method of geomechanical justification of the parameters of pillar extraction is developed. The results of the estimation of the stress-strain state (STS) of pillars and their host massif for the characteristic time moments of the pillar delineation of mined-out spaces are given.

How to cite: Kovalev O.V., Sirenko Y.G., Tkhorikov I.Y., Kovalskii E.R. Geomechanical substantiation of parameters for potash ore follow-up extraction from pillars using a drill auger excavation // Journal of Mining Institute. 2004. Vol. 156. p. 80-83.
Mineral resources development
  • Date submitted
    2002-07-28
  • Date accepted
    2002-08-03
  • Date published
    2003-02-01

Determination of rational parameters of drainage excavations in the emission hazardous zones of potassium formations

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Taking into account the theory of formation of blowout-hazardous zones of dip trough type, the average statistical parameters of cavities of artificially initiated salt and gas emissions were determined for the conditions of the Starobinskoye field. Dependencies for determining the location of the center of the blowout zone in the vertical and horizontal planes are derived. The way of transition of emission-hazardous zones during excavation of the Third Potash Seam at full capacity is concretized. The correlation between the slope angle of the advanced drift with the initiation cut, which serves for artificial decoupling of the release, and the geometric parameters of the release zone was found. When conducting the advance face with the initiating jaw in the direction to the center of the trough core during the initiation of the outburst, taking into account this dependence will reduce its intensity, increase the safety of mining operations, as well as improve the economic indicators of the method of transition of the outburst-risk zone by the longwall.

How to cite: Kovalskii E.R. Determination of rational parameters of drainage excavations in the emission hazardous zones of potassium formations // Journal of Mining Institute. 2003. Vol. № 2 155. p. 68-70.
Development of mineral deposits
  • Date submitted
    2001-09-11
  • Date accepted
    2001-10-25
  • Date published
    2002-04-01

Development of methods for crossing the emission hazardous zones when excavating the third potash layer of the Starobinskoye deposit at full capacity

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Statistical analysis of the results of crossing by mining works of geological disturbances of dip trough type at PA Belaruskali has been performed. I.A. Odessky's theory on formation of dip troughs is considered and specified. On the basis of the basic method, used in the mines of the Association and the described theory of mound formation, the method of artificial initiation of coal and gas blowout in the longwall at excavation of the Third Potash Seam of Starobinskoye deposit at full capacity was developed. Parameters of the method are determined taking into account the geometric structure of the dipping trough. Immediately before the initiation of drilling and blasting operations a conductive channel is formed for salt and gas ejection into the mined-out space. For the given method, taking into account geological structure of the troughs and physical and mechanical properties of salt rocks, a standard BWR passport for artificial initiation of salt and gas ejection with limitation of the ejection intensity is calculated. According to the passport, the blasting is carried out with three deceleration stages, at that the central borehole is not charged. The results of calculations of parameters of works on initiation of sudden emissions in zones of geological disturbances are presented.

How to cite: Sirenko Y.G., Kovalskii E.R. Development of methods for crossing the emission hazardous zones when excavating the third potash layer of the Starobinskoye deposit at full capacity // Journal of Mining Institute. 2002. Vol. 152. p. 85-88.