Cutting Characteristics of a Ductile Rock


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Yaşar S.

GeoScience Engineering, cilt.66, ss.76-83, 2020 (Hakemli Üniversite Dergisi)

  • Cilt numarası: 66 Konu: 2
  • Basım Tarihi: 2020
  • Doi Numarası: 10.35180/gse-2020-0033
  • Dergi Adı: GeoScience Engineering
  • Sayfa Sayıları: ss.76-83

Özet

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