Page 12 - Advanced Mine Ventilation

Contents xi

17 Floor Gas Emissions and Gas Outbursts 283
17.1 Floor Gas Emissions 284
17.2 Gas Outbursts 289
17.3 Parameters Indicating a Propensity to Gas Outbursts 290
17.4 Prevention of Gas Outburst 292
References 296

18 Gas Transport in Underground Coal Mines 299
18.1 Construction of Pipeline 300
18.2 Gas Leakage Detection and Safeguards 302
18.3 Other Preventive Measures for Safe Gas Transport 303
18.4 Ventilation 306
18.5 Corrosion of Steel Pipelines for Methane Drainage 306
18.6 Compressors 309
18.7 Surface Discharge of Gas 309
18.8 A Typical Application for Mine Safety and Health
Administration Approval of a Gas Pipeline System 310
References 312

19 Measurement and Monitoring of Mine Gases 313
19.1 Detection Methods 313
19.2 Monitoring of Mine Gas 318
19.3 Wireless Communication and Monitoring System 320
19.4 Special Arrangements for Monitoring in Mines Liable
to Spontaneous Combustion 320
References 323

20 Economics of Coal Mine Degasification 325
20.1 Safety in Mines 325
20.2 Reduced Cost of Mining by Improved Productivity 326
20.3 Revenues From Drained Methane 326
20.4 Gas Production From Coal SeamsdA Stand-Alone Business 328
20.5 Economic Analysis 333
Problem 336
References 341

Section Four Mine Fire Control 343

21 Spontaneous Combustion of Coal 345
21.1 Spontaneous Combustion of Coal 346
21.2 Detection of Spontaneous Combustion 354
21.3 Mine Design for Coal Seams Liable to Spontaneous Combustion 357
Problems 361
References 361