Dominant Cutting Parameters Affecting the Specific Energy of Selected Sandstones when Using Conical Picks and the Development of Empirical Prediction Models

Dominant Cutting Parameters Affecting the Specific Energy of Selected Sandstones when Using... Specific energy is one of the most significant parameters in the process of rock cutting and it has been widely used for evalu- ating the performance of excavation machines. In this paper, based on rock cutting tests that were conducted on a linear cutting machine (LCM), the effects of relevant cutting parameters and characteristics, including the clearance angle, the cone (tip) angle of conical picks, the rake angle and the cutting depth on specific energy were investigated. Five different conical picks with the cone angles between 60° and 100° were used in the experiments. In addition, five different sandstones with uniaxial compressive strength varying from 17.91 to 85.98 MPa were subjected to cutting tests under different levels of cutting parameters. As a result of the tests, it was found that the clearance angle has a considerable effect on cutting force and specific energy. When it was greater than 10°, mean cutting force increased with the increasing cone angle, yet linearly decreased with the increasing rake angle and attack angle. However, specific energy has no statistical relationship with the attack angle, the rake angle, and the cone angle. It does not vary effectively with the relevant angles. Statistical analyses also indicate http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Rock Mechanics and Rock Engineering Springer Journals

Dominant Cutting Parameters Affecting the Specific Energy of Selected Sandstones when Using Conical Picks and the Development of Empirical Prediction Models

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Publisher
Springer Vienna
Copyright
Copyright © 2018 by Springer-Verlag GmbH Austria, part of Springer Nature
Subject
Earth Sciences; Geophysics/Geodesy; Civil Engineering
ISSN
0723-2632
eISSN
1434-453X
D.O.I.
10.1007/s00603-018-1522-1
Publisher site
See Article on Publisher Site

Abstract

Specific energy is one of the most significant parameters in the process of rock cutting and it has been widely used for evalu- ating the performance of excavation machines. In this paper, based on rock cutting tests that were conducted on a linear cutting machine (LCM), the effects of relevant cutting parameters and characteristics, including the clearance angle, the cone (tip) angle of conical picks, the rake angle and the cutting depth on specific energy were investigated. Five different conical picks with the cone angles between 60° and 100° were used in the experiments. In addition, five different sandstones with uniaxial compressive strength varying from 17.91 to 85.98 MPa were subjected to cutting tests under different levels of cutting parameters. As a result of the tests, it was found that the clearance angle has a considerable effect on cutting force and specific energy. When it was greater than 10°, mean cutting force increased with the increasing cone angle, yet linearly decreased with the increasing rake angle and attack angle. However, specific energy has no statistical relationship with the attack angle, the rake angle, and the cone angle. It does not vary effectively with the relevant angles. Statistical analyses also indicate

Journal

Rock Mechanics and Rock EngineeringSpringer Journals

Published: May 31, 2018

References

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