It is of great importance to consider long-term stability of rock mass around the openings of underground structure, during design, construction and operation of the said structures in rock. In this context, three methods namely, empirical, analytical and numerical have been applied to design and analyze the stability of underground infrastructure at the Siah Bisheh Pumping Storage Hydro-Electr...

Successful application of a TBM in a project requires investigating both the ground conditions and the machine and backup system design features. Prediction of the machine performance is very important as it has a big effect on the duration of the project and the costs. In this respect, both penetration rate and advance rate must be estimated. Utilization factor, which depends on the type of op...

The creep behavior of deep weak rock masses is important due to an underground opening. Appreciating the nature and source these deformations requires knowledge mass ground support interaction. theoretical solution backfill’s internal stresses needs consider time-dependent effect. In present study, coupling interaction between nearby material in backfilled stope considered characteristics are g...

Steel-lined pressure tunnels and shafts are used to convey water from the reservoir to the turbines in high-head hydroelectric power plants. An axisymmetrical multilayer model is often considered by engineers for the design of the steel liner. Stresses and deformations can then be computed with a closed-form analytical solution in isotropic rock. When the rock is anisotropic, the lowest elastic...

The proposal of the NATM has changed people’s understanding support principle. Therefore, how to improve self-supporting capacity surrounding rock become an important issue in research. Bolts and lining are widely used together various projects because their bearing reinforcement effects line with concept NATM. This paper puts forward a model analyze mechanical behavior deeply buried circular t...