Precise, rapid, and reliable prediction of rock strength parameters is of great significance for
underground engineering. This paper presents a method for predicting rock strength …

Improving the rock-breaking efficiency of hard rock formation has always been of concern in
drilling. Compound impact drilling technology is a new method to achieve efficient crushing …

To enhance the drilling performance in deep hard rocks and reduce overall drilling efforts,
this work proposes a Combined Thermo-Mechanical Drilling (CTMD) technology. This …

Estimation of drillability is very important in rock drilling. Drilling performance and tool wear
are two indispensable parameters for time and cost evaluation of an operation. In this article …

Achieving efficient crushing of hard rocks has always been an urgent problem in mining and
tunneling. A novel numerical model of rock fragmentation was developed by the hybrid …

Identification of stratigraphic interfaces and lithology is a key aspect in geological and
geotechnical investigations. In this study, a monitoring while-drilling system was developed …

The aim of this study is to analyse the forces between hammer drill and robot during
automated concrete drilling. A series of tests was carried out with a 6-axis industrial robot …

A phenomenological model for percussive drilling systems is proposed in this paper to
explain the experimentally demonstrated existence of an optimal weight-on-bit (WOB), for …

In order to be able to develop a hammer drill with which the user can work as ergonomically
and productively as possible, the relevant influencing factors must be known. In addition to …

The efficient use of drilling machines is one of the key factors that are considered in the
economic evaluation of mining operations. A prediction of penetration rate is necessary to …