Makeyev S.Yu., Osenniy V.Ya., Ryzhov G.A., Osennyaya N.V., Holyavik O.V. Theoretical consideration of plasma energy transfer to the rock mass

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Parent Category: Geo-Technical Mechanics, 2016

Category: Geo-Technical Mechanics, 2016, Issue 128

THEORETICAL CONSIDERATION OF PLASMA ENERGY TRANSFER TO THE ROCK MASS

Makeyev S.Yu., Osenniy V.Ya., Ryzhov G.A., Osennyaya N.V., Holyavik O.V. 

Makeyev S.Yu., Ph.D. (Tech.), Senior Researcher,

Osenniy V.Ya., M.S (Tech),

Ryzhov G.A., M.S (Tech),

Osennyaya N.V., M.S (Tech)

(IGTM NAS of Ukraine)

Holyavik O.V., Ph.D. (Tech.), Associate Professor

(National Technical University of Ukraine

"Igor Sikorsky Kyiv Polytechnic Institute")

Article Language: English

 

Abstract. The article is devoted to the problem of hard ores, in particular of ferruginous quartzites, thermodynamic destruction with the help of new environmentally friendly and saving-resource technologies of blasting operations in the Kryvyi Rih basin. Until now, no more effective methods have been developed for making underground chambers for explosive substances, than the plasma method, though control of plasma torch thermodynamics remains a live problem. This method allows making chambers of any configurations. The article presents results of theoretical studies of how plasma impacts on the iron ore mass. The dependencies of distribution of temperature loads and normal and tangential stresses in the rock on time and coordinate are specified.  It is stated that tensile stresses of magnetic quartzites being treated by plasma is ten times greater than compressive stresses. Calculations, which take into account rock pressure, convective and radiant heat transfer from the plasma  jet  specify  essentially  more  exactly geometry of stress distribution, time of  stress diffusion, density of thermal field in the surface sector of the borehole. Scientific novelty of the presented results lies in justification of models of plasma-flow impact on the iron ore mass in the pre-fracture zone at the borehole expansion. The results can be used in technological processes of breaking hard ores into the camera, during sinking the raise workings and during construction of the cutting slots and other workings for domestic purposes.

Keywords: chamber cavity, plasma, temperature loads, tensions.

 

REFERENCES

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About the authors

Makeyev Sergey Jurievich, Candidate of Technical Sciences (Ph.D), Senior Researcher, Senior Researcher in Department of Mineral Mining at Great Depths, M.S. Polyakov Institute of Geotechnical Mechanics under the National Academy of Sciences of Ukraine (IGTM, NASU), Dnipropetrovsk, Ukraine, This email address is being protected from spambots. You need JavaScript enabled to view it.

Osinniy Valentin Yakovlevich, Master of Science (M.S), Researcher in Department of Mineral Mining at Great Depths, M.S. Polyakov Institute of Geotechnical Mechanics under the National Academy of Sciences of Ukraine (IGTM, NASU), Dnipropetrovsk, Ukraine, This email address is being protected from spambots. You need JavaScript enabled to view it.

Ryzhov Gennadiy Aleksandrovich, Master of Science (M.S), Junior Researcher in Department of Mineral Mining at Great Depths, M.S. Polyakov Institute of Geotechnical Mechanics under the National Academy of Sciences of Ukraine (IGTM, NASU), Dnipropetrovsk, Ukraine, This email address is being protected from spambots. You need JavaScript enabled to view it.

Osinnyaya Nataliya Volodymyrivna, Master of Science (M.S), Junior Researcher in Department of Elastomeric Component Mechanics in Mining Machines, M.S. Polyakov Institute of Geotechnical Mechanics under the National Academy of Sciences of Ukraine (IGTM, NASU), Dnipropetrovsk, Ukraine, This email address is being protected from spambots. You need JavaScript enabled to view it.

Holyavik Olga Vitaliyvna, Candidate of Technical Sciences (Ph.D), Associate Professor, Associate Professor of Department of Mechanics Plasticity of Materials and Resource-Saving Processes, National Technical University of Ukraine "Igor Sikorsky Kyiv Polytechnical Institute", Institute of Mechanical Engineering (I. Sikorsky KPI), Kyiv, Ukraine, This email address is being protected from spambots. You need JavaScript enabled to view it.

 

 

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