Brainscape's Knowledge GenomeTM

Browse over 1 million classes created by top students, professors, publishers, and experts.


See full index

Geotechnical Engineering > Advances in Rock Mechanics > Flashcards

Advances in Rock Mechanics Flashcards

1
Q

What is the human-earth system

A

Engineering research on earth systems has similarities to medical research.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
2
Q

Is there an increased use in rock mechanics

A

Yes - due to more building being done and there needing to be more underground tunnelling along with other infrastructure being built underground

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
3
Q

How many time the minerals does an electric car need than conventional

A

6 times

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
4
Q

How many more minerals is needed for and onshore wind plant then gas-fired plant of the same capacity

A

9 times

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
5
Q

What does the transition to clean energy mean in terms of materials mean

A

it requires a shift from fuel-intensive industry to a material intensive industry

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
6
Q

What are some critical minerals needed for clean energy

A

Copper

Cobalt

Nickel

Lithium

REEs

Chromium

Zinc

PGMs

Aluminum

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
7
Q

What is rock mass characterization

A

accurately defining the properties of rock masses in a geologically complex environment

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
8
Q

What is stress-strain behavior of rocks

A

understanding the complex mechanical behavior of rocks under different loads and conditions

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
9
Q

what are fracture mechanics

A

predicting the initiation and propagation of fractures in rocks, and the effect of fractures on rock behavior

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
10
Q

what is rock stability

A

determining he stability of slops, underground excavations, and other structures in rock masses, and predicting the occurence of rock failures

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
11
Q

What is rock mechanical in unconventional oil and gas production

A

understanding the behavior of rocks in unconventional reservoirs, and developing safe and effective methods for extracting oil and gas

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
12
Q

what is numerical modeling of rock mechanics

A

using numerical models to simulate the behavior of rocks in complex geological environments and predict the response of rock masses to different loads.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
13
Q

How do mechanical rock properties and their variability with different geological conditions in terms of
a) hardening
b) perfectly plastic
c) softening
d) elastic-brittle

A

Look at slide 17

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
14
Q

What are the common test with the associated properties
More Common Tests Properties
Uniaxial Compressive Test (Uniaxial compressive)
Triaxial Compressive Test & Multistage trixial test
Slake Durability Index Swelling strain and slake durability
Direct shear test
Point Load Index
Ultrasonic pulse velocity
Less Common Tests
ISRM Hoek triaxial test
Brazillian Tensile Test
Creep Test

A

Peak strength, Young’s Modulus, Poisson’s Ratio
Strength envelope (from multiple and single
samples) and Mohr Coulomb parameters
Shear strength
Strength
Shear strength
Strength
Dynamic elastic constants
Strength envelope from H-B parameters
Tensile strength
Time-dependent behaviour

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
15
Q

What are some recent advances in rock mechanics

A

*More capable lab testing
* Improved numerical modelling
* Coupled geotechnical systems
* Advances in imaging analysis
* Advanced visualisation
* New materials
* Extreme environment
* Dynamic rock failures

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
16
Q

What is the three-level support approach

A

First level: yeilding reinforcement (rockbolts and cable bolts)
Second level: ring beam (for seismic events 100-1000 kJ)
third level: hydraulic support (siesmic events >1000 kJ)

17
Q

Why is deep sea mining being looked at? Why is it not possible?

A

*There are huge amounts of resources located there
*the mining tech isn’t there yet needs to be done in a vacuum

18
Q

What is the relations to peak stress for civil vs mining

A

civil uses the before peak where mining uses the post peak curve

19
Q

what are the strong 3D component of failures

A

*weak rock
*layered strata
*corners
*water present

20
Q

what are the most important pillars of geomechanics
(3 pillars of rock problems)

A

*rock mass quality
*stress (dead weight or mining induced stress)
*excavations (for change of stresses and equations)

21
Q

How has rock mechanics changed in terms of 4 section graph

A

Now moved to 1 and 4 this is due to more data but little understanding

22
Q

what is the response to stress from rock

A

*deformation
*heat (energy)
*stress (noise)

23
Q

What are the areas that need to be
improved in rock mechanics and rock
engineering for the next 5-10 years ,
e.g. in terms of methodologies ?

A

share more data and improve the quality of data this includes digitalisation of data

24
Q

what is dangerous about perfect tunnels and ribs

A

no energy dissipated which is dangerous

Geotechnical Engineering (17 decks)

Brainscape helps you reach your goals faster, through stronger study habits.
© 2024 Bold Learning Solutions. Terms and Conditions