ROCK MECHANICS
CE 76511

Course Objectives:
The objective of the course is to provide the student with the concept and the tools that can be used to incorporate in the field of geotechnical engineering. The course includes the advanced techniques that are not dealt in the courses of soil mechanics and foundation engineering.

1. Scope of Rock Mechanics
   (2 hours)
2. Nature of Rocks
   (2 hours)
3. Classification and Index Properties of Rocks
   (4 hours)
1. Geological classification
2. Index properties of rock system
3. Porosity
4. Density
5. Permeability
6. Strength
7. Slaking and durability
8. Sonic velocity as an index to degree of fissuring
4. Rock Strength and Failure Criteria
   (7 hours)
1. Modes of failures of rock
2. Common lab strength tests
3. σ-ε behavior in compression
1. σ-ε
2. hydraulic compression
3. deviatoric compression
4. effect of σ3
4. Meaning of rock strength
5. σ-ε curve
6. Mohr-Coulomb failure criteria
7. Effect of water
8. Empirical failure criteria
9. Effect of size on strength
10. Anisotropic rocks
5. Initial Stresses in Rocks and their Measurement
   (7 hours)
1. Influence of the initial stresses
2. Estimating the Initial stresses
1. horizontal stresses
2. vertical stresses
3. horizontal stresses direction
3. Techniques for measurements of in-situ stresses
1. hydraulic fracturing
2. flat jack method
3. over coring
6. Planes of Weaknesses in Rock
   (4 hours)
1. Joint orientation
2. Joint testing
3. Joint roughness
4. Effect of water pressure
7. Deformability of Rocks
   (5 hours)
1. Elastic and non-elastic behavior
2. Elastic constants
3. Measurements of deformability
1. lab compression test
2. plate bearing test
3. borehole and gallery test
4. radial jacking test
5. flat jack test
6. dynamic measurement
7. fractured rocks
8. Application of Rock Mechanics to Rock Slope Engineering
   (8 hours)
1. Modes of failure of slope in hard rock
2. Kinematic analysis of slopes
3. Analysis of plane sliding of the stereographic projection
4. Analysis of wedge sliding using stereographic projection
5. Analysis of slides composed of two blocks
9. Application of Rock Mechanics to Rock Slope Engineering
   (6 hours)
1. Modes of failure of slope in hard rock
2. Kinematic analysis of sloes
3. Analysis of plane
4. Analysis of plane sliding of the stereographic projection
5. Analysis of wedge sliding using stereographic projection
6. Analysis of slides composed of two blocks

Tutorial:
Three assignments that include the determination of shear strength, displacement and analysis of slides using stereographic projection
Practical:
Rock strength test, different test for deformability
References:

1. B. M. Das, "Principles of Geotechnical Engineering', Boston PWS Engineering.
2. Cook, N.G.W. et al (1966), "Rock Mechanics Applied to Rockbursts - a Synthesis of the Results of Rockburst Research in South Africa up to 1965", J. S. African Inst. Min. Metall. Vol. 66, No. 10, 435-528.
3. Ortlepp, W.D. and Cook, N.G.W. (1965), "The Measurement and Analysis of the Deformation around Deep Hard-rock Excavations", Proc. 4th Intnl. Conf. on Rock Mech. And Strata Control. New York, 140-152.
4. Leeman, E.R, "Remote Measurement of Rock Stress under Development in Rock Mechanics",
5. Leeman, E.R., "The Measurement of Stress in Rock. Parts I to III", J. S. African Inst. Min. and Metall. Vol 65, No. 2, 48-114 and Vol 65, No.4, 254-284.
6. Leeman, E.R. and Hayes, DJ. (1966), "A Technique for Determining the Complete State of Stress in Rock using a Single Borehole", Proc. 1st Intnl. Cong. on Rock Mechanics. Lisbon.

Evaluation Scheme:
The questions will cover all the chapters in the syllabus. The evaluation scheme will be as indicated in the table below:

Chapter	Hours	Marks Distribution*
1	2	4
2	2	4
3	4	8
4	7	12
5	7	12
6	4	8
7	5	10
8	8	12
9	6	10
Total	45	80

*There could be minor deviation in mark distribution.