Intro
Preface
Acknowledgements
Contents
About the Authors
1 Introduction
1.1 Preamble
1.2 Underground Blasting for Metalliferous Mining
1.3 Advancements in Underground Production Blasting
1.4 Summary
References
2 Overview of Underground Metalliferous Mining
2.1 Introduction
2.2 Stages in Underground Metalliferous Mining
2.3 Stoping Methods Practised in India
2.3.1 Sublevel Stoping
2.3.2 Longhole Stoping
2.3.3 Room and Pillar Stoping
2.3.4 Cut and Fill Stoping
2.4 Summary
References

3 Rock-Explosive Interaction During Underground Blasting
3.1 Introduction
3.2 Rock Breakage Mechanism
3.3 Rock Mass Damages Under Dynamic Loading
3.3.1 Constitutive Models Used for Numerical Simulation of Rock Blasting
3.4 Rock Parameters and Their Role on Damage Characteristics
3.4.1 Nearfield Vibration and Rock Breakage Characteristic
3.5 Influence of Explosive Parameters on Rock Mass Damage
3.5.1 Commercial Explosive and Its Principle of Explosion
3.5.2 Explosive Parameters
3.5.3 Equation of State for Explosive

3.6 Impacts of Blast Design Parameters on Rock Mass Damage
3.6.1 Blasthole Diameter
3.6.2 Burden
3.6.3 Spacing
3.6.4 Stemming
3.6.5 Subgrade Drilling
3.6.6 Charging Parameters
3.6.7 Delay Timings
3.7 Summary
References
4 Drivage Excavation Using Drilling and Blasting
4.1 Introduction
4.2 Elements of Burn-Cut Blast Design
4.3 Measurement of Outputs from Underground Drivage Blasting
4.4 Optimization of Drivage Blasting Pattern
4.4.1 Numerical Simulation and Prediction of Damages from Drivage Blasting

4.4.2 Designing of Delay Pattern for Drivage Blasting Using Nearfield Ground Vibration Monitoring Results
4.5 Summary
References
5 Box-Cut Excavation and Stope Opening
5.1 Introduction
5.2 Principle of Underground Slot Raise Blasting
5.3 Drilling Pattern for Slot Raise Blasting
5.4 Charging and Initiation of Blastholes in Slot Raise Blasting
5.5 Delay Sequence of Blastholes for Slot Blasting Pattern
5.6 Special Slot Raise Blasting Pattern
5.7 Summary
References
6 Underground Ring Blasting
6.1 Introduction
6.2 Drilling Pattern for Underground Ring Blasting

6.3 Charging of Ring Blastholes
6.3.1 Suitability of Explosive for Different Rock Strata
6.3.2 Charge Factor and Dimensional Parameters for Ring Blasting
6.4 Connection and Firing Sequence of Charged Ring Blastholes
6.4.1 Optimization of Delay Sequence and Delay Timing for Production Blasting
6.4.2 Delay Timing for Multi-Ring Blasting
6.5 Summary
References
7 Blast-Induced Hazards
7.1 Introduction
7.2 Standards on Ground Vibration Limits
7.3 Sensitive Structures Prone to Ground Vibration Hazards
7.4 Optimisation of Ring Blasting Parameters for Structural Safety