Rock Fracture and Blasting

Theory and Applications

Zong-Xian Zhang

• Publisher: Butterworth-Heinemann
• Year: 2016
• Print ISBN: 9780128026885
• eBook ISBN: 9780128027042
• Topic: Tecnologia e ingegneria
• Subtopic: Geologia e scienze della terra

Rock Fracture and Blasting: Theory and Applications provides the latest on stress waves, shock waves, and rock fracture, all necessary components that must be critically analyzed to maximize results in rock blasting. The positioning of charges and their capacity and sequencing are covered in this book, and must be carefully modeled to minimize impact in the surrounding environment.Through an explanation of these topics, author Professor Zhang's experience in the field, and his theoretical knowledge, users will find a thorough guide that is not only up-to-date, but complete with a unique perspective on the field.- Includes a rigorous exposition of Stress Waves and Shock Waves, as well as Rock Fracture and Fragmentation- Provides both Empirical and Hybrid Stress Blasting Modeling tools and techniques for designing effective blast plans- Offers advanced knowledge that enables users to choose better blast techniques- Includes exercises for learning and training in each chapter

Part I

Stress Waves and Shock Waves

Chapter 1: Stress Waves

Chapter 2: Shock Waves

Chapter 1

Stress Waves

Abstract

Stress waves can be found in rock drilling, rock blasting, mining-induced seismicity, and other dynamic events. By means of stress wave theory, we can improve the quality and productivity of current rock drilling, rock blasting, and mining production; reduce natural resource loss; improve fieldwork safety; and reduce the damage to the environment caused by blasting. This chapter introduces the basic knowledge of stress waves, particularly one-dimensional stress waves. It covers various kinds of stress waves, wave reflection and transmission on a free surface or an interface, one-dimensional wave propagation, impact of two elastic bars, propagation of elastic waves in two and three bars, wave superposition, spalling theory, split Hopkinson bars, characteristic impedances of various materials, and wave attenuation and dispersion in rocks.

Keywords

stress waves

spalling

attenuation

dispersion

wave reflection

transmission

split Hopkinson bars

one-dimensional waves

Chapter Outline

1.1 Coordinates, Wave Velocity, and Particle Velocity 4

1.1.1 Coordinates 4

1.1.2 Wave Velocity and Particle Velocity 4

1.2 Category of Stress Waves in Solids 5

1.2.1 Body Waves 5

1.2.2 Surface Waves 6

1.2.3 Stress Waves Relevant to Stress–Strain Relation of Materials 8

1.2.4 Other Names of Waves 8

1.3 Reflection and Transmission of Elastic Waves 9

1.3.1 Reflection of Elastic Waves on a Free Surface 9

1.3.2 Reflection and Transmission of Elastic Waves at an Interface Between Two Media 10

1.3.3 Stress Waves from Rock Blasting 10

1.4 Theory of One-Dimensional Elastic Stress Waves 10

1.4.1 Wave Equation in One-Dimensional Condition 10

1.4.2 Solution of Wave Equation 12

1.5 Stress Wave Analysis Using a Lagrangian Diagram 14

1.5.1 Lagrangian Diagram for Elastic Waves 14

1.5.2 Lagrangian Diagram for Elastic–Plastic Loading Waves 15

1.6 Impact of Two Elastic Bars 17

1.6.1 General Case 17

1.6.2 Special...

Table of contents

• Cover
• Title page
• Table of Contents
• Copyright
• Dedication
• About the Author
• Preface
• Part I: Stress Waves and Shock Waves
• Part II: Rock Fracture and Fragmentation
• Part III: Explosive Donation in a Blast Hole
• Part IV: Basic Parameters of Rock Blasting
• Part V: Rock Blasting in Engineering
• Part VI: Rock Blasting on Economy, Safety, and Vibrations
• Subject Index