In most rock engineering, the rock mass was cut into different blocks by natural structural
planes, and the stability of underground openings was affected by the type, number, position …

Key block theory is a widely used method in rock engineering for analyzing the stability of
fractured rock masses. However, the traditional theory does not consider the forces between …

The key block theory is often the first analysis carried out in assessing potential instability
caused by tunneling through jointed rock masses. This study suggests that it is beneficial to …

The process of scaling and support installation in recently blasted tunnels is one of the most
hazardous aspects of the underground construction process. An algorithm is developed that …

With the excavation of underground opening, the roof rock block may fall under external
dynamic disturbance. In this paper, the roof rock mass was simplified as a rock block system …

Excavation of shallow-buried, hard rock masses usually leads to the instability of rock blocks
delimited by discontinuity planes. Classic block theory only deals with the stability of rock …

This study proposed a new semi-deterministic block theory (NSDBT) method, in which the
sizes and spatial positions of discontinuities along with their orientations were incorporated …

Purpose. Discontinuities in rock masses are natural fractures that delimit various block
shapes and sizes, which can fall, slide or topple from the excavation and collapse under …

The dynamic disturbance is one of the major reasons to trigger rock block sliding along the
discontinuities of roof rock mass during the mining excavation. A self-developed test …

Several failure modes may occur around underground excavations, one of the most
common being block failure. The size distribution and occurrence probabilities of unstable …