The organic carbon-and uranium-rich, marine Alum Shale Formation in northwestern
Europe (Middle Cambrian (Miaolingian) to Early Ordovician) was deposited in the Baltic …

Rock mass is often encountered with complicated stress disturbance, the cyclic or fatigue
loading path with fixed loading frequency and amplitude are widely performed. To date …

We performed mechanical tests on several, mainly European black shales with different
mineralogical composition, porosity and maturity. The uniaxial and triaxial compressive …

The failure criterion is a very important aspect of the wellbore stability analysis. But the Mohr–
Coulomb criterion, a most commonly used failure criterion, is usually too conservative, due …

Chemical and mechanical coupling are the most important factors affecting wellbore
instability. The main objective of this research is to propose a wellbore stability analysis …

The stability of wells drilled into bedded formations, eg, shales, depends on the orientation
between the bedding and the borehole axis. If the borehole is drilled sub-parallel to …

Efforts towards producing low-carbon fossil fuels and renewable energy resources have
increased significantly within the last two decades and are expected to grow even more in …

To analyse the fracture coalescence behaviour around hole-like flaws in rock, rectangular
cuboid marble specimens containing a single rectangular cavity or two rectangular cavities …

The aim of this study is to better understand the mechanisms controlling the initiation,
propagation, and ultimate pattern of borehole breakouts in shale formation when drilled …

Large diameter boreholes drilled to a depth of 1000–2000 m are currently investigated in
Australia as a potential solution for waste emplacement and long-term containment for long …