Improving efficiency of rock destruction through twinned operation of various bit cutters

S. A. Prokopenko, M. Cehlar

Research output: Contribution to journalArticlepeer-review


The cutters currently used in mine combines have a one-time use pattern and a high level of metal waste. a replaceable operating bit cutter design was proposed and tested. this bit allows to run the cutter next longer with a significant reduction in metal usage. a poor compliance of the conical design cutters with the essence of the concept "cutter". the cutter design with a blade bit in the form of a cutting disk has been developed. Such a cutter has a higher cutting ability with less effort, breakdown energy intensity and dusting. the large length of the cutting edge extends significantly the time of cutter effective use. Mounting on the working member consistently in the cutting line of two cutters - first with a disk and then with a tapered bit - provides a further increase in the rock destruction efficiency. the twinned operation of various bit cutters is characterized by easier conditions for the massif penetration; exception of the conditions for formation of a crushed rock core; effective shear rupture of the initial cut faces. the result is a reduction in the combine energy costs, a long service life of the rock-cutting tool, and increase in the resource efficiency of rock mass breaking.

Original languageEnglish
Pages (from-to)18-21
Number of pages4
Issue number11
Publication statusPublished - 1 Nov 2018


  • Combine
  • Cut
  • Cutter
  • Design
  • Detachable bit
  • Disk
  • Mine
  • Rock
  • Twinned installation (mounting)
  • Working member

ASJC Scopus subject areas

  • Fuel Technology
  • Geotechnical Engineering and Engineering Geology
  • Energy Engineering and Power Technology
  • Mechanical Engineering
  • Geochemistry and Petrology

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