Rock failure phenomena, such as rockburst, slabbing (or spalling) and zonal disintegration,
related to deep underground excavation of hard rocks are frequently reported and pose a …

Stress conditions around deep underground mine openings can significantly influence rock
fragmentation and stability, and thus the cuttability of the targeted rock. In this study, rock …

A theoretical formulation was first established to evaluate the dynamic stress concentration
factor (DSCF) around a circular opening under conditions of blasting stress wave incidence …

In this study, we investigated the failure process and evolution mechanisms in circular
tunnels under a complex stress path of deep in-situ stress+ excavation unloading+ stress …

Scientists have attempted to investigate deep underground rock failure. A key challenge to
study underground rock failure is the difficulty to survey its process. Therefore, a large …

High excavation-induced stress concentration and strong mining/tunneling disturbance are
prominent conditions in deep excavations, and often present a coupled process to induce …

A modified Hopkinson pressure bar system with coupled static and dynamic disturbance is
used to study the failure characteristics of a granite specimen with a cavity. Different coupled …

The theoretical formulas were firstly derived to quantitatively assess the relative velocity
around a circular tunnel induced by blasting loads, and the influence of wavelength-to …

Coal and gas outbursts have long posed a serious risk to safe and efficient production in
coal mines. It is recognised that coal and gas outbursts are triggered by excavation …

Excessive deformation of tunnel lining structures can be identified as a common problem in
Eastern China soft ground. Grouting treatment is an effective and common method to …