Titov A.A. Experimental research of interrelation between rock layer porosity and deformation forces on the flat surfaces of disintegrators

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Parent Category: Geo-Technical Mechanics, 2017

Category: Geo-Technical Mechanics, 2017, Issue 137

 

Geoteh. meh. 2017, 137, 56-64

EXPERIMENTAL RESEARCH OF INTERRELATION BETWEEN ROCKLAYER POROSITY AND DEFORMATION FORCES ON THE FLATSURFACES OF DISINTEGRATORS

¹Titov A.A.

¹SHEI “NMU”

UDC 621.926: 622.73

Abstract. Deformation of granite layer with granite fraction less than 0.5 mm was

experimentally studied in order to determine normal-pressure distribution on the flat working surfaces of disintegrators. Series of tests with material compression between two plates without lateral restrictions was conducted, and distribution of porosity factor along the radius of deformation zone was determined. Experiment with compression of different quantities of material in the mortar with the punch down to pressures of 40 MPa was carried out in order to calibrate pressure depending on the material porosity. Compression curves were built for different masses of the sample. For the case of material compression without lateral restrictions, regression curve of dependence between material porosity and pressure was built on the base of compression force balance equation. This curve coincides with compression curve for minimal mass of material sample compressed in the mortar. Distribution of normal pressures on the top plate was determined, at that, experimental curve was more flat than the theoretical one. The pressure high concentration in the center of deformation zone and underloading of its periphery were confirmed.

Keywords: disintegrator, deformation zone, loose material, compression curve, pressure distribution.

 

REFERENCES

1. Revnivtsev, V.I., Barzukov, O.P., Ivanov, N.A. [and others] (1984), “Basic dependences of loose material layer condition changes during compression”, Mineral dressing, no. 4, pp. 3-6.

2. Revnivtsev, V.I., Denisov, G.A., Zarogatskiy, L.P. and Turkin, V.Y. (1992), Vibrational disintegration of hard materials, Nedra, Moscow, Russia.

3. Nadutyy, V.P. and Titov, A.A. (2017), “Analysis of influence of loose mining rocks compactibility on the process of their deformation between flat surfaces of disintegrators”, Vibration in engineering and technology, no. 1(84), pp. 35-40.

4. Nadutyy, V.P. and Titov, A.A. (2016), “Analysis of Stressed condition of the flat deformed zone of vibrational disintegrators taking into consideration material throwing-out”, Vibration in engineering and technology, no. 3(83), pp. 54-58.

 

About the author

Titov Aleksandr Aleksandrovich, Candidate of Technical Sciences (Rh.D), Associate Professor in the Department of Mining Machines and Engineering, State HEI “the National Mining University”, Dnipro, Ukraine, This email address is being protected from spambots. You need JavaScript enabled to view it.

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