Unit 1 Introduction

5 lecture hours

• Definitions and terms used in rock mechanics
• Present scope
• development, and application of the rock mechanics
• Introduction to stress analysis
• Principles of stress and strain
• Mohr’s circle of stress and circle of strain
• Stress-strain relationship
• Differential equation of static equilibrium

Unit 2 Physico–Mechanical Properties of Rock

6 lecture hours

• Physical properties of rock: density
• moisture content
• degree of saturation
• swell index
• slake durability index
• thermal conductivity
• electrical properties, and durability
• Mechanical properties of rock: strength
• plasticity, and hardness
• Preparation of test specimens
• Laboratory determination of compressive
• shear strength
• modulus of elasticity
• Poisson’s ratio, and tri-axial strength of rock
• Mohr’s envelope
• in-situ strength
• Effect of geological parameters on engineering properties of rock mass
• Time-dependent properties of rock mass: Creep deformation and strength behaviour
• creep test and rheological models

Unit 3 Stress Analysis around Openings

12 lecture hours

• Pre-mining and induced stresses
• Pressure Arch Theory. stress distribution around single
• pillar, and irregularly shaped excavations
• Analytical approaches: Numerical models
• etc Types of stress-strain measuring instruments include load cells
• strain gauges, and others
• Convergence measurement instruments: dilatometers
• optical gauges
• compressometers, etc
• In-situ strength properties of rocks
• In-situ stress measurement: plate load test
• cable jack test
• borehole test
• dilatometer test
• hydrofracturing, etc
• Monitoring of rock movement instruments: instrumented rock bolts and their merits and demerits
• Dynamic properties of rock and rock mass
• Failure Criteria for rock and rock mass: Theory
• Mohr's and Griffith's criteria
• empirical criteria

Unit 4 Rock Mass Classification

• Classification systems in rock engineering: Classification of intact rocks
• Classification of rock masses -Terzaghi’s rock load, RQD, Rock Structure Rating (RSR)
• Bieniawski’s RMR, Barton’s Q-System
• Laubscher 's-MRMR
• Hoek 's-GSI
• Palmstrom’s RMi
• Recent developments: correlations between different classification systems
• Applications of rock mass classification in rock engineering. 12 Program Name: Bachelor of Engineering Level: UG Branch: Mining Engineering Subject Code: BE04022011 Subject Name: Rock Mechanics

Unit 5 Rock supports

10 lecture hours

• Theory of rock mass reinforcement by rock bolting
• its types and cable bolting
• shotcreting, etc
• Mechanism of support
• forces and displacements associated with bolting