Development of predictive models for the specific energy in indentation of rocks
Kalyan Balla, Ch.S.N. Murthy, R.P. Choudhary
Available Online November 2016.
- https://doi.org/10.2991/rare-16.2016.85How to use a DOI?
- indentation; specific energy; index angle; micro controller compressive testing machine
- This paper presents an experimental study on the static indentation tests on six types of rocks namely marble, limestone, basalt, steel gray granite, moon white granite and black galaxy granite using commercial drill bits (indenters) of spherical button type of 35mm, 38mm, 45mm and 48mm diameter to determine specific energy at four index (rotation) angles viz 100, 200, 300, 400. The influence of the operating variables like diameter of indenter (drill bit), index angle and rock properties on the specific energy were investigated and analysed. Statistical analyses were employed to determine the most significant operating variables and rock properties influencing the specific energy and the models were built for the estimation of specific energy depending on the operating variables and the rock properties. Moreover, the derived models were validated through statistical tests such as the determination coefficient, VAF (Variation Account For), Root Mean Squared Error (RMSE) and Mean Absolute Percentage Error (MAPE). The results indicated that the specific energy varied with the change in diameter of indenter and index angle. It was concluded that the specific energy varies with variation of physico-mechanical properties of rocks
- Open Access
- This is an open access article distributed under the CC BY-NC license.
Cite this article
TY - CONF AU - Kalyan Balla AU - Ch.S.N. Murthy AU - R.P. Choudhary PY - 2016/11 DA - 2016/11 TI - Development of predictive models for the specific energy in indentation of rocks BT - Recent Advances in Rock Engineering (RARE 2016) PB - Atlantis Press SN - 2352-5401 UR - https://doi.org/10.2991/rare-16.2016.85 DO - https://doi.org/10.2991/rare-16.2016.85 ID - Balla2016/11 ER -