Epigenetics is the epi-information beyond the DNA sequence that can be inherited from
parents to offspring. From years of studies, people have found that histone modifications …

Abstract The Hoek–Brown failure criterion has developed into the most widely used system
for estimating rock mass strength in rock engineering. The reason lies in its unique …

The design experience and the shallow tunnel theory, which emphasize the plane strain
assumption, two-dimensional (2D) strength theory, and indoor or back analysis-based …

List of Symbols r1 Major principal stress r3 Minor principal stress Co Uniaxial compressive
strength mi Hoek–Brown material constant (intact rock) mb Hoek–Brown material constant …

The floor heave and the inward movement of sidewalls are often encountered in the
excavation of tunnels with swelling rock properties. However, the deformation mechanism …

Deep rock tunneling exhibits a significant three-dimensional (3D) space effect. The complex
stress path and extrusion deformation during excavation are the most significant and …

Wellbore instability is reported frequently as one of the most significant incidents during
drilling operations. Analysis of wellbore instability includes estimation of formation …

The deformation capacity of tunnel will be overestimated by small strain theory especially in
high geostress and heavily squeezing rocks, the calculated wall convergence of tunnel may …

Spalling is a typical brittle failure phenomenon of hard rock in deep caverns under high
geostress. In this study, key issues are systematically studied concerning the spalling failure …

Social development has led to the placement of high standards on ultra-long and ultra-deep
mountain tunnels. Disasters may be encountered during the construction and maintenance …