Rock Mechanics encompasses the study of rock properties, rock behavior under stress, and the design of rock support systems to ensure stability and safety in rock engineering projects.

Electrical resistivity is not typically measured in Rock Mechanics, as it is more relevant to geophysics and soil properties.

Shear stress, caused by the weight of the overlying rock and the geometry of the excavation, is the primary cause of rock failure in underground excavations.

The Mohr-Coulomb failure criterion is used to predict the shear strength of rocks by considering the cohesion and internal friction angle of the rock material.

Geotextiles are not commonly used as rock support systems in underground excavations. They are primarily used in soil reinforcement and filtration applications.

Grouting is used in geotechnical engineering to improve rock strength, reduce permeability, and stabilize loose soil and rock masses.

Rock anchors are typically longer, installed at an angle, and can carry higher loads compared to rock bolts.

The stability of a slope is influenced by a combination of factors including slope angle, soil or rock properties, and groundwater conditions.

Retaining walls are used in geotechnical engineering to support soil or rock masses, prevent landslides, and create level surfaces for construction.

Electro-osmosis is not a common method for soil improvement. It is a technique used to remove water from soil by applying an electric field.

Foundation engineering encompasses the design, construction, and analysis of foundations to ensure the stability and safety of structures.

Caisson foundations are not as common as spread footings, pile foundations, and mat foundations.

Geotechnical investigations are conducted to collect data on soil and rock conditions, assess site suitability, and design foundations and earth structures.

Geophones are not commonly used in geotechnical engineering. They are primarily used in geophysics for seismic surveys.

Soil mechanics encompasses the study of soil behavior, development of theories and models, and the design and construction of earth structures.