Rock macro-indentation plays a fundamental role in mechanical rock breaking for various
rock engineering application, such as drilling, tunneling, cutting, and sawing. Over the past …

Published data on 48 different rocks are used to evaluate the correlations between the
uniaxial compressive strength (UCS) values and the corresponding results of point load …

The uniaxial compressive strength (UCS) of rock is an important geotechnical parameter for
engineering applications. However, how to determine the UCS simply and accurately has …

To reliably estimate drilling performance both tool–rock interaction laws along with a proper
rock brittleness index are required to be implemented. In this study, the performance of a …

The rock brittleness is one of the most important rock properties that affect the drill-ability of
rocks. It is supposed that the increase in rock brittleness causes the increase in penetration …

Drilling rate index (DRI) is a fundamental parameter in the investigation of rock drillability, as
drillability is considered one of the main problems in rock engineering. Several researchers …

Experimental studies for quantification of force and brittleness indices relevant to rock cutting
performance are presented. A simple interpretation method is developed, which quantifies …

The purpose of this paper is to provide a proper, practical and convenient drilling rate index
(DRI) prediction model based on rock material properties. In order to obtain this purpose, 47 …

The brittleness is a fundamental rock property and effective in drilling and rock excavation.
Knowing the relations between the drillability and the brittleness will help the rock …

Rate of penetration (ROP) is one of the most important parameters of the drilling operation.
Optimizing the ROP will reduce the overall cost of the drilling process. ROP depends on …