Gankevich V.F., Kravets V.I., Livak O.V. Research of the temperature fields on surface of mine breed at friction of flat element for thermo-cyclical weakening of superficial layer

Details

Parent Category: Geo-Technical Mechanics, 2017

Category: Geo-Technical Mechanics, 2017, Issue 135

Geoteh. meh. 2017, 135, 83-91

RESEARCH OF THE TEMPERATURE FIELDS ON SURFACE OF MINE BREED AT FRICTION OF FLAT ELEMENT FOR THERMO-CYCLICAL WEAKENING OF SUPERFICIAL LAYER
 ¹Gankevich V.F., ²Kravets V.I., ²Livak O.V.
¹SHEI «NMU», ²SHEI «USUChT»

UDC 622.236.3:622.235.57;536.4

Abstract. Problem of rock half-space surface heating in the contact area when a flat loaded stamp moves along it for preparing for the thermal cyclic destruction is considered. Analytical dependencies between the rock heating and stamp loading and its sliding velocity are obtained. Comparison of analytical dependences of the obtained temperatures with experimental data shows an appropriate correlation between them in case of decreased intensity of bore washing. This happens because the calculated dependence does not ensure any cooling of both the half-space and the die. The obtained dependencies allow calculating any elements of friction against the borehole bottom and walls while designing technological processes and working parts for thermal-cyclical cracking and disintegration of rocks in the boreholes with rock preheating by friction.
Keywords: rock, thermal destruction, drilling, friction.

REFERENCES

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About the authors:

Gankevich Valentin Feodosiyevich, Candidate of Technicsl Sciences (Ph.D.), Associate Professor, Assocsate Professor in the Department of Mine Machines of the State Higher Educational Institution «National Mining Univercity» (SHEI «NMU»), Dnepr, Ukraine.

Kravets Vasiliy Ivanovich, Candidate of Technicsl Sciences (Ph.D.), Associate Professor, Head of the Department of Applied Mechanics of the State Higher Educational Institution «Ukrainian State Univercity of Chemical Technology» (SHEI «USUChT»), Dnepr, Ukraine.

Livak Oksana Viktorovna, Master of Science, Assistant of the Department of Applied Mechanics of the State Higher Educational Institution «Ukrainian State Univercity of Chemical Technology» (SHEI «USUChT»), Dnepr, Ukraine, This email address is being protected from spambots. You need JavaScript enabled to view it.

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