Anthropogenic operations involving underground fluid extraction or injection can cause
unexpectedly large and even damaging earthquakes, despite operational and regulatory …

Threats posed by the climate crisis have created an urgent need for sustainable green
energy. Geothermal resources have the potential to provide up to 150 GWe of sustainable …

Effective methane extraction in underground coal seams can improve the efficient utilization
of fossil energy and reduce the risk of safety accidents in coal mines. Pulsating nitrogen …

Injection-induced seismicity has become a major barrier to the development of geothermal
energy, because the complexity of fault behaviors and the lack of physical fundamentals …

To understand combined effects of water saturation and loading rate on the fracture
behavior of rock materials, dynamic notched semi-circular bending (NSCB) tests were …

The presence of water strongly affects rock properties and would be related to a series of
geological disasters. To understand water saturation effects on the mechanical behavior of …

This article reviews laboratory experimental studies on hydraulic fracturing under triaxial and
true triaxial stress conditions in crystalline rock for geothermal purposes, and places …

In underground rock engineering, rock structures at great depth are commonly subjected to
water infusion, static geo-stress as well as the dynamic disturbances. It is thus essential to …

Cyclic hydraulic fracturing, which employs cyclic injection with alternating high and low
injection rates or pressurization, is suggested to assist in reducing induced seismicity. Our …

Precession of planets or moons affects internal liquid layers by driving flows, instabilities and
possibly dynamos. The energy dissipated by these phenomena can influence orbital …