THE CORRELATION BETWEEN PHYSICAL-MECHANICAL PROPERTIES AND THE CUTTING CHARACTERISTICS IN THE CASE OF UNMINEABLE ROCK FORMATIONS FROM HUSNICIOARA LIGNITE OPEN PIT

References: 17th International Multidisciplinary Scientific GeoConference SGEM 2017, www.sgem.org, SGEM2017 Conference Proceedings, ISBN 978-619-7105-00-1 / ISSN 1314-2704, 29 June - 5 July, 2017, Vol. 17, Issue 13, 869-876 pp, DOI: 10.5593/sgem2017/13/S03.110

ABSTRACT

The performances of the excavation machines depend largely on the tool and overall machine characteristics and on the other hand on physical mechanical characteristics of the excavated rock. There were more theories based on analytical deductions to explain the main cutting parameters on the basis of basic physical mechanical properties of the excavated rock. In this paper we use a new methodology, based on reliable laboratory data, which make possible to obtain correlation and regression formulas in order to predict the cuttability parameters of rock, as the cutting specific resistance and the specific energy consumption, starting from basic physical –mechanical properties of rocks, mainly the unmineable ones.

Keywords: excavation, cutting , lignite, open pit