Rock Mechanics 2 Flashcards
What is the primary focus of rock mechanics?
The study of the behavior of rock materials under various conditions of stress and strain.
True or False: Rock mechanics is only concerned with the physical properties of rocks.
False
Fill in the blank: The three main types of rock are ______, ______, and ______.
igneous, sedimentary, metamorphic
What is the term for the maximum stress that a material can withstand before failure?
Ultimate strength
Which property of rock describes its ability to deform under stress?
Elasticity
Multiple choice: Which of the following is NOT a type of rock stress? A) Compressive B) Tensile C) Shear D) Magnetic
D) Magnetic
What is the Mohr-Coulomb failure criterion used for?
To predict the failure of materials under shear stress.
True or False: Rock mass classification systems help in assessing the stability of rock structures.
True
What is the term for the ratio of the volume of voids to the volume of solid in a rock sample?
Porosity
Fill in the blank: The ______ is a measure of a rock’s ability to transmit fluids.
Permeability
What does the term ‘rock weathering’ refer to?
The process by which rocks are broken down by environmental factors.
Multiple choice: Which type of stress is associated with pulling apart a rock? A) Compressive B) Tensile C) Shear D) Torsional
B) Tensile
What is the significance of the rock mass rating (RMR)?
It provides a systematic way to classify the quality of rock masses.
True or False: Geotechnical engineering is a branch of engineering that deals with rock mechanics.
True
What is the term for the angle of internal friction in rocks?
Friction angle
Fill in the blank: ______ refers to the resistance of a material to deformation.
Stiffness
Multiple choice: Which test determines the unconfined compressive strength of rock? A) Triaxial Test B) Brazilian Test C) Point Load Test D) All of the above
D) All of the above
What is the purpose of rock core sampling?
To obtain a cylindrical section of rock for analysis.
True or False: The elastic modulus is a constant for all types of rocks.
False
What does the term ‘slope stability’ refer to?
The condition of inclined soil or rock slopes to remain intact.
Fill in the blank: The ______ is the point at which a material begins to deform plastically.
Yield point
Multiple choice: Which of the following is a common method for monitoring rock stability? A) Inclinometers B) Strain gauges C) Tiltmeters D) All of the above
D) All of the above
What is the significance of the term ‘ductility’ in rock mechanics?
It measures how much a rock can deform before breaking.
True or False: Rock fractures can significantly affect the mechanical properties of rocks.
True
What is the main purpose of rock mechanics in civil engineering?
To ensure the stability and safety of structures built on or within rock.
