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Title: THE PROTECTION OF MINE WORKINGS IN THE TECTONICALLY STRESSED ROCK MASS
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THE PROTECTION OF MINE WORKINGS IN THE TECTONICALLY STRESSED ROCK MASS
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1314-2704
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English
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20
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1.2
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The paper presents the results of geomechanical research of the state of mine workings located in the bearing pressure zone at a rockburst hazardous deposit. The aim of the research is substantiation of the measures to protect the mine workings from the impact of high tectonic stresses. The stress-strain state calculations were carried out by the finite element method in volumetric setting. Numerical models have been developed on the basis of in-situ measurements data of stress field parameters.
The stress-relief measures at rockburst hazardous deposits have been applied at several scale levels. The first one is a local level that allows reducing the stresses in a near-marginal part of mine workings and pillars. The second one is a regional level carried out within the mining field, a level or a block. The parameter of the stress strain state, which should first of all be taken into account when developing a protective measure, is the direction of maximum component of principal stresses. A significant effect of rock mass stress relief is achieved when creating cavities perpendicular to the action of maximum component of principal stresses. As a result of numerical experiments, the conditions for the maximum efficiency of drilling a string of deep boreholes from the overlying level for unloading the mine workings of the underlying one are substantiated. Model generation and stress-strain state calculations were carried out in the Sigma GT software, which implements the finite-element method in a volumetric formulation and allows modeling stress and strain fields taking into account the main geological and mining-engineering factors. |
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conference
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20th International Multidisciplinary Scientific GeoConference SGEM 2020
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20th International Multidisciplinary Scientific GeoConference SGEM 2020, 18 - 24 August, 2020
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Proceedings Paper
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STEF92 Technology
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International Multidisciplinary Scientific GeoConference-SGEM
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SWS Scholarly Society; Acad Sci Czech Republ; Latvian Acad Sci; Polish Acad Sci; Russian Acad Sci; Serbian Acad Sci & Arts; Natl Acad Sci Ukraine; Natl Acad Sci Armenia; Sci Council Japan; European Acad Sci, Arts & Letters; Acad Fine Arts Zagreb Croatia; C
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347-352
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18 - 24 August, 2020
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website
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cdrom
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6902
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stress-strain state; numerical modeling; underground mining; rockburst hazardous deposits; tectonic stresses
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