Roof bolting technology is widely used for support design in an underground coal mine. This paper focused on the numerical simulation considered the behaviour of roof and rock – grout – bolt interaction.Simulation of three dimensional model of depillaring panel with roof bolt support is difficult to...

Stability of rock masses at shallow depth is often controlled by shear behavior of discontinuities. This is an important issue in an engineering environment as well as from societal point of view. With regard to shear behavior assessment through laboratory investigation, direct shear test under constant...

Theory about the interaction of TBM disc cutters and rock mass is critical for the design of the TBM machine. The numerical model of the interaction between cutters and rock, has important theoretical and practical meaning for developing a complete forecasting model of TBM performance. In this paper,...

Presence of different openings along the extraction line (goaf edge) in a mechanised depillaring (MD) panel provides an easy path for the goaf to encroach the working area during caving. A number of continuous miner based MD operations are adopted in Indian coalfields in last thirteen years, where roof...

This paper presents numerical analyses for the stability of a pillar between two caverns in an underground oil storage project. The geological condition of this pillar reveals two major lineaments (intrusive bodies) intersecting each other between two caverns, which results in dislocation of dykes and...

Understanding the failure mode and crack propagation in rock can provide useful information for safe and economic design of various structures in rock. Many researchers have developed theoretical criteria for rock failure with crack growth based on experimental observations. Numerically using cohesive...

Shearing resistance of rock joints is considered as one of the key aspects of rock masses as it is related to the stability of rock mass particularly at shallow surface condition. The shear behaviour of rock joints depends upon a number of influencing parameters and weathering state of discontinuity...

Analysis of tunnels and underground excavations requires a realistic prediction of strength and deformation characteristics of rockmass. The strength characteristics of rockmass must be determined by laboratory testing such as triaxial test but generally, classification approach is used to predict the...

Subsidence is a universal process that occurs in response to the voids created by extracting solids or liquids from beneath the Earth surface. The void created by the underground extraction causes significant changes in the magnitude and orientation of the insitu stress field and results in deformations...

S' factor is very important for operational existence of underground mines i.e. Stability, Stress, Shaft, Stoping and Safety. These factors depend on geology and in situconditions around the excavatedzone. Major geological discontinuities and uncertainties in geology, sometimes have a deleterious effect...

This paper highlights a simple procedure to simulate stresses in a Tunnel when the excavation is being progressed. The paper is based on use of PHASE2 software which is a simple 2D software and needs no special training. This remains to be an important aspect for predicting displacement while using NATM...

Sustainable development requirements made it necessary that underground space shall be used with larger size openings. This is to ensure a greater transportation demand and for preserving environment quality. The need for underground space technology has increased significantly during the past few decades...