Brittleness is a key mechanical characteristic of rock and critical to various engineering
practices particularly to design efficient fracturing stimulation of unconventional shale gas …

Geomechanical properties are of high relevance in the design and optimization of hydraulic
fracturing required for production from shale gas reservoirs. Experimental techniques that …

The nonlinearity of rock becomes more significant as the buried depth increases, which
changes the stress redistribution and deformation patterns during tunneling. In this study, a …

The injection of supercritical CO 2 into coal seam alters the mechanical properties of the
coal, which should be paid close attention when considering security issues during CO 2 …

Fracturing behavior of ductile multi-flawed rock mass is very different from those of brittle
multi-flawed rock mass. However, there is a very vague distinction of the fracture mechanism …

A unified strain-hardening and strain-softening (UHS) elastoplastic constitutive model is
developed to capture the nonlinearity of intact rocks. Three new developments are …

The critical condition with respect to the brittle-ductile transition (BDT) is of great significance
in understanding the distinction between brittle and ductile behavior for rocks. In this paper …

Brittle index evolution is an important property of rocks in the context of mining engineering,
as it often determines how severe the practical consequences of rock burst will be. However …

The emergent macroscopic behaviors of Bonded Block Models (BBM) are governed largely
by the properties assigned to their three components–blocks, contacts and zones (blocks …

The constant mi is a fundamental parameter required in the Hoek–Brown (H–B) failure
criterion for estimating rock strength. Triaxial tests for the calculation of this constant are time …