INVESTIGATION OF GRAVITY MOTION ANGELS AND SLIDING FRICTION COEFFICIENTS OF THE MINE ROCKS

Details

Parent Category: Geo-Technical Mechanics, 2014

Category: Geo-Technical Mechanics, 2014, Issue 118

UDC 622.273.216

Authors:

Koshka A.G., PhD. (Tech.) (State H E I «NMU»)

Malashkevych D.S., Doctoral Student (State H E I «NMU»)

Schelkanov R. R. (State H E I «NMU»)

Abstract.

Results of laboratory investigations of gravity motion angels and sliding friction coefficients on two different surfaces - noncorrosive steel and porcelain-enameled steel - are given. Data of basic physical and mechanical properties of the rocks sampled during developing one of the drifts in the “Belozerskaya Mine” are shown. With the help of method of experiments planning a concrete number of experiments required for obtaining true results was determined. Laboratory facilities are described which were used for studying basic laws of different backfill materials moving under the action of own weight.

 Dependences between minimal angels of gravity motion, sliding friction coefficients, grain composition and moisture content, as well as type of friction surface used are also given.

Keywords:

 reservation of the rocks, sliding friction coefficient, experiment planning, sliding surface.

References:

1. Voloshin, A. (2013), “Theory and practice of vibration-pneumatic machines”, Coal of Ukraine, vol. 2, pp. 8-12.

2. Koshka O., Yavors`kyy A., and Malashkevych D. (2014), “Surface subsidence during mining thin seams with waste rock storage”, Progressive technologies of coal, coalbed methane, and ore mining, CRC Press Taylor&Francis Grpoup, London, pp. 229-234.

3. Lyaptsev, S.A., Potapov, V.J., Potapov, V.V., and Semericov L.A. (2014), “Patterns of mineral separation on an inclined plane friction separator”, Izvestiya Uralskogo gosudarstvennogo gornogo universiteta, no. 2(34), pp. 36-40.

4. GOST 12071-2000: Grunty. Otbor, upakovka, transportirovanie i ikh khranenie [GOST 12071-2000: Soils. Selection, packaging, transportation and storage], Interstate standard, Moscow, Russia.

5. GOST 28268-89 3 : Pochvy. Metody opredeleniya vlazhnosti, maksimalnoy gigroskopicheskoy vlazhnosti [GOST 28268-89 3: “Soils. Methods for determination of moisture content, the maximum hygroscopic moisture”], Interstate standard, Moscow, Russia.

6. Grachev, Yu. P. and Plaksin, Yu. M. (2005), Matematicheskie metody planirovaniya experimentov [Mathematical methods for design of experiments], DeLiprint, Moscow, Russia.

About the authors:

Koshka Aleksandr Grygorevyh, Candidate of Technical Sciences (Ph.D), Associate Professor of the Underground mining department, State Higher Education Institution «National Mining University» (SHEI «NMU»), Dnepropetrovsk, Ukraine, This email address is being protected from spambots. You need JavaScript enabled to view it. .

Malashkevych Dmitry Sergeevych, Doctoral Student of the Underground mining department, State Higher Education Institution «National Mining University» (SHEI “NMU”), Dnepropetrovsk, Ukraine, This email address is being protected from spambots. You need JavaScript enabled to view it. .

Schelkanov Roman Ruslanovich, Student of Mining faculty. State Higher Education Institution «National Mining University» (SHEI “NMU”), Dnepropetrovsk, Ukraine, This email address is being protected from spambots. You need JavaScript enabled to view it. .

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