STUDY OF ROCK MASS RESISTANCE TO PENETRATION OF A CONICAL TOOL
B. B. Danilov1, A. I. Chanyshev1,2, D. O. Cheshchin1
1Chinakal Institute of Mining, Siberian Branch, Russian Academy of Sciences, Novosibirsk, Russia
2Novosibirsk State University of Economics and Management, Novosibirsk, Russia
Keywords: Resistance, elastic, plastic, viscoplastic, depth, speed, time
Abstract
Among various types of resistance of a rock mass to the penetration of a solid body into it, the resistance types associated not with rebound, but with the depth of penetration (viscoplastic resistance) are determined. It is shown how at a known initial speed of the tool movement (at the depth and time of penetration measured in experiments), for a given tool geometry, the required resistance function is restored, consisting of a constant term and a function which depends on the speed of movement. More acceptable is the geometry of the tool, in which the resistance of the medium to penetration for a given depth is minimal.
|
