Foreword | p. vii |
Preface | p. ix |
Acknowledgments | p. xi |
Author | p. xiii |
Coal Structure | p. 1 |
Genesis of Coal Substance | p. 2 |
Elemental Composition of Coals | p. 5 |
Structure of Organic Mass | p. 8 |
X-Ray Studies | p. 17 |
Literature Review | p. 17 |
Structural Peculiarities of Coal-Methane System | p. 31 |
New Approach to Analyzing Coal via Scattering X-Ray Investigation | p. 37 |
Materials and Methods | p. 41 |
Results and Discussion | p. 42 |
Conclusions | p. 53 |
Porosity | p. 53 |
General Characteristics | p. 54 |
Neutron Scattering | p. 59 |
Fractality | p. 63 |
Closed Porosity of Donbass Coals | p. 69 |
Conclusions | p. 78 |
References | p. 80 |
Equilibrium Phase States and Mass Transfer in Coal-Methane Systems | p. 87 |
Equilibrium and Dynamics of Mass Exchange between Sorbed and Free Methane | p. 87 |
Gaseous State of Methane in System of Opened and Closed Pores | p. 87 |
Solid Solution of Methane in Coal: Absorption and Adsorption | p. 90 |
Diffusion of Methane from Coal Lumps into Filtration Volume: Efficient Diffusion Coefficient | p. 93 |
Joint Flow of Filtration and Diffusion Processes in Coal Massifs | p. 94 |
Double-Time Models of Mass Transfer: Fast and Slow Methane | p. 94 |
Methane Escaping from Coal into Closed Volume: Role of Backpressure | p. 98 |
Methane Flow from Coal Seam into Worked-Out Space | p. 104 |
Methane Accumulation in Dangerous Coal Lump Regions | p. 107 |
Time for Formation of Highly Explosive Methane-Air Mixture | p. 107 |
Thermodynamic Gibbs Potential for Gas-Coal Massif: Prognosis for Localization of Coal Burst Sections of Seam | p. 111 |
Investigation of Phase State and Desorption Mechanisms of Methane in Coal | p. 114 |
Methane Phase States in Coal | p. 115 |
Kinetics and Mechanisms of Methane Desorption from Coal | p. 126 |
Transformation of Methane Desorption Mechanism: Three Stages of Desorption | p. 140 |
Conclusions | p. 143 |
References | p. 144 |
Nuclear Magnetic Resonance Studies of Coal and Rocks | p. 147 |
Experimental Techniques | p. 147 |
High Resolution Spectrometers | p. 147 |
Wide Line Spectrometers | p. 148 |
High Pressure Technique | p. 151 |
Coal Structure Research | p. 157 |
Determining Structural Components of Coals through 1H NMR Data | p. 157 |
Application of 13C NMR for Analyzing Coal Structures | p. 158 |
Research of Donets Basin Coals | p. 160 |
Phase States of Water and Methane in Coal | p. 161 |
Water-Coal Adsorption | p. 163 |
Adsorption by Impulse NMR | p. 170 |
Water in Rocks | p. 182 |
Methane in Coal | p. 187 |
Phase State of Binding in Rocks | p. 195 |
Polymer Compositions in Coals | p. 195 |
Binding in Rocks | p. 200 |
Conclusions | p. 209 |
References | p. 210 |
Behaviors of Rocks and Coals in Volumetric Fields of Compressive Stresses | p. 215 |
Experimental Technique | p. 215 |
Literature Review | p. 216 |
True Triaxial Compression Unit | p. 220 |
Strength Properties of Rocks Treated by Different Binders | p. 226 |
Experimental Methods and Estimates of Strengthening | p. 227 |
Width of Fissure Openings | p. 229 |
Moisture of Rocks under Strengthening | p. 230 |
Temperature of Surroundings | p. 232 |
Conclusions | p. 233 |
Influence of Loading Method and Loading History on Volumetric Strength | p. 234 |
Loading Method | p. 234 |
Loading History | p. 237 |
Conclusions | p. 240 |
Coal Destruction | p. 240 |
Mechanism of Coal Destruction | p. 241 |
Filtration Properties | p. 249 |
Changes of Fissured and Porous Structures | p. 252 |
Limit State | p. 254 |
Post-Limit State | p. 261 |
Essence of Problem | p. 262 |
Post-Limit Deformation under True Triaxial Compression | p. 264 |
Conclusions | p. 272 |
References | p. 273 |
Genesis of Natural Gases, Methane Extraction, and Coal Mining Safety | p. 277 |
Genesis of Gases in Coal-Bearing Series | p. 277 |
Methane Isotopic Analysis: Literature Review | p. 278 |
Methane Isotopic Analysis: Experiment and Discussion | p. 279 |
Mossbauer Spectroscopy | p. 282 |
Stoichiometry of Reaction | p. 285 |
Conclusions | p. 287 |
Dependence of Outburst Proneness on Mineral Inclusions | p. 288 |
Experiments and Discussion | p. 288 |
Conclusions | p. 292 |
Electromagnetic Method of Seam Degassing | p. 292 |
Electric Dipole | p. 301 |
Magnetic Dipole | p. 302 |
Conclusions | p. 303 |
Physics of Fissured Porous Coal Structure Transformation under Influence of Unloading Wave | p. 303 |
Influence of Gas Content on Stability of Coal-Gas System | p. 304 |
Modeling of Porous Medium | p. 308 |
Movement of Wave of Unloading | p. 310 |
Transformation of Pores into Fissures | p. 316 |
Classification of Gas-Dynamic Phenomenon Type | p. 318 |
Criteria of GDP | p. 320 |
Parameters and Technology of Method | p. 324 |
Predicting Coal Seam and Sandstone Outburst Danger | p. 327 |
Outburst Dangers of Coal Seams | p. 327 |
Criteria for Outburst Danger | p. 327 |
Criteria for Outburst Estimation | p. 327 |
Grounding and Testing of Outburst Prediction Method at Openings of Steep Seams | p. 332 |
Rock and Gas Outbursts | p. 335 |
Safe Extraction of Coal | p. 341 |
Outburst Control Measures | p. 341 |
Safe Load on Working Face | p. 349 |
Conclusions | p. 351 |
References | p. 351 |
Index | p. 359 |
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