To explore the influence of lithology on the failure behavior of layered tunnel, true triaxial
compression experiments were undertaken on cubical phyllite and yellow sandstone …

Deep rocks are typically under a true-triaxial stress state. The strength of deep rock is thus
dictated by both the direction and magnitude of principal stresses. The formulation of three …

To analyze and predict the mechanical behaviors of deep hard rocks, some key issues
concerning rock fracturing mechanics for deep hard rock excavations are discussed. First, a …

Understanding the real physical and mechanical characteristics of deep rocks under in situ
geological conditions is fundamental for deep rock engineering. Rock mechanics that …

Most rockbursts are associated with jointed rock masses as the energy stored inside the rock
is prone to abruptly release at such discontinuities. Moreover, remote blasting at working …

The occurrence of rockburst is closely related to initial high stress state and excavation
unloading effects. To investigate the effects of three-dimensional (3D) stress state and …

The surrounding rock in deep underground engineering is often subjected to true three-
dimensional high-stress conditions. Excavation unloading results in changes in the stress …

To investigate the influence of the bedding angle on the failure process and characteristics
of circular hole sidewalls, true-triaxial lab tests were conducted on cubic phyllite specimens …

During deep underground coal mining, coal is typically fractured under high in situ and
mining-related stresses, thus increasing the risk for dynamic disasters. However, knowledge …

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 …