Environment-Friendly Techniques of Rock Breaking

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ISBN: 9789058092694 | 9058092690
Cover: Hardcover
Copyright: 10/15/2003

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Significant advances have been made in non-explosive rock breaking techniques in the past two decades. This monograph focuses specifically on environmental-friendly rock excavating using chemical, thermal, hydraulic, electric and hybrid systems. For the first time, a comprehensive overview of the theoretical concepts and state-of-the-art practical developments has been compiled and presented based on these emerging techniques.

Preface

Introduction

(4)

Breaking rocks of high comprerssive strength

(10)

Rock-breaking processes and methods

(13)

Rock-breaking methods in terms of energy requirements

Rock breaking using high-voltage current and infrared radiatin generators (IRR)

(6)

Major determinants of the effectiveness of high-voltage rock breaking

(1)

Rock breaking using high-voltage current

(2)

Cutting oversize rock blocks using infrared radiation (IRR) generators

(3)

Chemical methods of rock breaking

(6)

Rock breaking using chemical methods

(2)

Rock breaking using `expanding powders'

(4)

Rock breaking using thermal methods

(28)

Introduction

(1)

Theoretical background

(3)

Rock properties that determine the applicability of thermal methods

(3)

Polymorphous transition of quartz as one of the determinants of process efficiency

(2)

Rock type and the applicability of thermal methods

(8)

Machines and equipment used for thermal cutting

(13)

Thermal burners for cutting cohesive rocks

(3)

Supply systems in thermal burners

(1)

Thermal-cutting techniques

(2)

Thermal burners for surface mining

(3)

Summary

(4)

Rock-breaking using electrohydraulic phenomenon

(62)

Cable explosion as the source of the shock wave shattering the rock structure

(5)

Melting

(1)

Slow explosions

(2)

Fast explosions (supersonic and ablation models)

(1)

Superfast explosions

(1)

Electrothermohydrodynamic mechanism of striated disintegration of exploding wires

(1)

Physical and mathematical model of electrohydrodynamic disintegration of exploding cables

(9)

Initial heating

(1)

Deformations of the cable surface

(5)

Cable disintegration

(2)

Generation of shock waves

(8)

Hydrodynamic parameters of an explosion

(2)

Shock wave reflection from rigid walls

(3)

Shock wave reflection from flexible walls

(1)

Electrohydrodynamic and magnetohydrodynamic characteristics of shock waves

(15)

The equation of state for water

(1)

Concentrated explosions

(1)

Suggested solutions - the solution for the initial conditions given by Rankin

(4)

Interpretation of results

(1)

Arc priod

(8)

Design and operating principles of the EHD generator

(8)

Control circuit and condenser-charging circuit

(1)

High-voltage power circuit

(3)

Battery of condensers

(1)

Design and operating principles of an electrohydraulic processor

(3)

Rock-breaking techniques using electrohydraulic generators

101

(16)

Breaking of oversize blocks

101

(7)

Rock mass cutting

108

(3)

Directional cutting/crushing of rock and concrete blocks

111

(6)

Rock breaking using hydraulic methods (high-pressure jets)

117

(26)

High-pressure jets --- classification and structure

118

(10)

High-pressure jets with abrasive particles

119

(8)

Jet-abrasive head

127

(1)

Nozzles for generation of pulsating jet streams and cavitating streams

127

(1)

Jet-assisted technologies in mining

128

(11)

Cutting the blocks from the rock mass using the jet technology

130

(3)

Jet-assisted cutting

133

(6)

High-pressure technologies in drilling

139

(4)

Plasma blasting in cohesive rock breaking

143

(10)

Properties of plasma and its applications in mining

143

(1)

Theoretical considerations

144

(4)

Rock-breaking techniques using plasma beams (plasma blasting)

148

(5)

Bibliography

153

(6)

Index

159

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Environment-Friendly Techniques of Rock Breaking

Summary

Table of Contents

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Environment-Friendly Techniques of Rock Breaking

Summary

Table of Contents

Supplemental Materials

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