Page 8 - Advanced Mine Ventilation

Contents

Preface xiii

Section One Mine Ventilation 1

1 Underground Coal Mine Atmosphere 3
1.1 Introduction to Coal Mining 4
1.2 Underground Mine Atmosphere 5
1.3 Properties of Air 6
1.4 Pollutant Control Strategy 10
1.5 Enforcement of Ventilation Standards 11
1.6 Definition of Air (Gas) Properties 13
Problems 15
References 16

2 Air Flow in Mine Airways 17
2.1 Introduction 17
2.2 Derivation of Basic Fluid Flow Equation 18
2.3 Traditional Equations for Pressure Loss Calculation in Mines 21
2.4 Determination of Mine Airway Friction Factor, K 23
2.5 Air Flow in Ventilation Duct/Pipes 25
2.6 Shock Losses in Mine Airways 25
2.7 Mine Characteristics Curve 28
2.8 Ventilation Airways in Series/Parallel 30
2.9 Calculation of Air Horsepower 33
Problems 33
References 34

3 Turbulent Dispersion of Pollutants in Mine Airways 35
3.1 Mine Ventilation Systems 35
3.2 Generalized Mass Transfer Model 36
3.3 Instantaneous Stationary Point Source 37
3.4 Continuous Stationary Point Source 38
3.5 Dispersion of Respirable Dust From a Heading 39
3.6 Dispersion in a Leaky Roadway 40