Experimental research of interrelation of mining mass layer porosity and defor-mation forces on flat surfaces of disintegrators

• Main Author: Titov, A.A.
• Format: Article
• Language: English
• Published: Інститут геотехнічної механіки імені М.С. Полякова НАН України 2017
• Series: Геотехнічна механіка
• Online Access: http://dspace.nbuv.gov.ua/handle/123456789/158637

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.