Effects of rock properties on specific cutting energy in linear cutting of sandstones by picks

Tiryaki, B. and Dikmen, A.C. (2005) Effects of rock properties on specific cutting energy in linear cutting of sandstones by picks. Rock Mechanics and Rock Engineering, 39 2: 89-120. doi:10.1007/s00603-005-0062-7

Author Tiryaki, B.
Dikmen, A.C.
Title Effects of rock properties on specific cutting energy in linear cutting of sandstones by picks
Journal name Rock Mechanics and Rock Engineering   Check publisher's open access policy
ISSN 0723-2632
Publication date 2005-04
Sub-type Article (original research)
DOI 10.1007/s00603-005-0062-7
Volume 39
Issue 2
Start page 89
End page 120
Total pages 32
Editor G. Barla
H. H. Einstein
K. Kovari
Place of publication Vienna, Austria
Publisher Springer
Collection year 2005
Language eng
Subject 290704 Geomechanics
640200 Primary Mining and Extraction Processes
Abstract Specific cutting energy (SE) has been widely used to assess the rock cuttability for mechanical excavation purposes. Some prediction models were developed for SE through correlating rock properties with SE values. However, some of the textural and compositional rock parameters i.e. texture coefficient and feldspar, mafic, and felsic mineral contents were not considered. The present study is to investigate the effects of previously ignored rock parameters along with engineering rock properties on SE. Mineralogical and petrographic analyses, rock mechanics, and linear rock cutting tests were performed on sandstone samples taken from sites around Ankara, Turkey. Relationships between SE and rock properties were evaluated using bivariate correlation and linear regression analyses. The tests and subsequent analyses revealed that the texture coefficient and feldspar content of sandstones affected rock cuttability, evidenced by significant correlations between these parameters and SE at a 90% confidence level. Felsic and mafic mineral contents of sandstones did not exhibit any statistically significant correlation against SE. Cementation coefficient, effective porosity, and pore volume had good correlations against SE. Poisson's ratio, Brazilian tensile strength, Shore scleroscope hardness, Schmidt hammer hardness, dry density, and point load strength index showed very strong linear correlations against SE at confidence levels of 95% and above, all of which were also found suitable to be used in predicting SE individually, depending on the results of regression analysis, ANOVA, Student's t-tests, and R2 values. Poisson's ratio exhibited the highest correlation with SE and seemed to be the most reliable SE prediction tool in sandstones.
Keyword Bivariate correlation
Linear regression
Linear rock cutting
Rock properties
Specific cutting energy
Texture coefficient
Q-Index Code C1
Q-Index Status Provisional Code
Institutional Status UQ

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Created: Wed, 15 Aug 2007, 06:48:45 EST