Cutting Characteristics of a Ductile Rock

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Yaşar S.

GeoScience Engineering, vol.66, no.2, pp.76-83, 2020 (Peer-Reviewed Journal)

  • Publication Type: Article / Article
  • Volume: 66 Issue: 2
  • Publication Date: 2020
  • Doi Number: 10.35180/gse-2020-0033
  • Journal Name: GeoScience Engineering
  • Journal Indexes: EBSCO Education Source
  • Page Numbers: pp.76-83
  • Karadeniz Technical University Affiliated: Yes

Abstract

A rock sample was obtained from an underground lignite mine for the investigation of the cutting characteristics
of a ductile rock
where the heading is achieved with a roadheader
. The rock sample (metasiltstone) was classified
according to a pertinent brittleness classification by means of its compressive strength to tensile strength ratio.
Two types of drag picks are used for the execution of the experimental campaign on core and block samples of the
metasiltstone. The cutting
force, the specific energy and the breakout angle variables were investigated. The cutting
force
-
distance histories of cutting trials were compared with the present literature. It
was
seen that even an
extremely ductile rock sample exhibited the character
istics of brittle cutting regime