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 …

Efficient drilling operations require optimal drilling parameters to achieve higher penetration
rates and minimize tool wear. This study focuses on characterizing the piston coefficient of …

Axial-torsional coupling impact drilling (ATCID) is a promising rock breaking method to
excavate energy mineral resource from deep and hard formations. Nevertheless, the optimal …

With the gradual increase in drilling and mining depth in geothermal, oil, and other fossil
energy explorations, complex geological environments (especially hard strata) have forced …

In order to improve the crushing efficiency of drilling machinery, laser-assisted mechanical
rock-breaking technology has gained wide attention in the field of engineering construction …

To systematically validate and calibrate the theory and technology of the deep in-situ
condition-preserved coring, the in-situ conditions at different depths should be simulated …

Microcracks have a significant effect on the physical and mechanical properties of rocks.
Inducing artificial microcracks in rocks can reduce rock strength and decrease the energy …

Rock indentation and fragmentation behavior under dynamic and quasi-static loads have
significant impacts on the exploration drilling for oil, gas, and geothermal energy. In this …

Diamond exposed on the surface of an impregnated diamond bit (IDB) is the key to breaking
rock. The exposure conditions of the diamond affect the drilling efficiency and life of the bit …

Mechanical mining and excavation in deep metal mines can be regarded as the process of
crushing hard rock by conical pick indentation. In this study, a confining pressure loading …