Preface Chapter 1 Introduction 1.1 Basic Concepts of Coal and Gas Co？extraction 1.2 Coal and Gas Co？extraction Models in China 1.3 History of Coal and Gas Co？extraction Technology 1.4 Research Methods of Coal and Gas Co？extraction 1.5 Research and Development Directions of Coal and Gas Co？extraction References Chapter 2 Basic Theory of Coal and Gas Co？extraction 2.1 Coal and Rock Mass Structure and Mechanical Characteristics 2.2 Strata Movement and Stress Distribution Characteristics 2.3 Coal Seam Gas Occurrence and Flow Theory 2.4 Theory of Mining "O" Ring in Coal and Rock 2.5 Theory of High？level Annulus in Coal and Gas Co？extraction References Chapter 3 Design Principles of Coal and Gas Co？extraction 3.1 Design Principles of Coal Mine 3.2 Design Principles of Mining Area 3.3 Design Principles of Working Face References Chapter 4 Coal and Gas Co？extraction by Roadway Method 4.1 Model of Coal and Gas Co？extraction by Roadway 4.2 Gas Extraction in First？mined Coal Seam 4.3 Gas Extraction in Stress？relief Coal Seam 4.4 Construction and Maintenance of Special Roadway for Gas Extraction References Chapter 5 Coal and Gas Co？extraction Without Coal Pillars 5.1 Principle of Surrounding Rock Control in Retaining Roadway along Goaf iv COAL AND GAS CO？EXTRACTION 5.2 Surrounding Rock Control Technology for Retaining Roadway along Goaf 5.3 Method of Gas Extraction Without Coal Pillars 5.4 Safety Guarantee System for Mining Without Coal Pillars References Chapter 6 Coal and Gas Co？extraction by Ground Drilling 6.1 Pre？extraction of Coalbed Methane Technology Using Ground Drilling 6.2 Stress？Relief Gas Drainage Technology Using Ground Drilling 6.3 "Three？zone Linkage" Three？dimensional Gas Extraction Technology References Chapter 7 Gas Extraction System 7.1 Establishment of Mine Gas Extraction System 7.2 Equipment Selection of Gas Extraction System 7.3 Gas Extraction Drilling and Construction 7.4 Monitoring and Control of Gas Extraction System 7.5 Gas Extraction Standards 7.6 Gas Extraction Management References Chapter 8 Utilization of Coal Mine Gas 8.1 Classification of Coal Mine Gas Sources 8.2 Gas Safety Transportation and Pretreatment Technology 8.3 Low Concentration Gas Enrichment and Comprehensive Utilization
8.4 Resource Utilization of High Concentration Gas 8.5 Gas power generation Waste Heat Refrigeration Technology References Chapter 9 Analysis of Costs and Benefits of Coal and Gas Co？extraction 9.1 Costs Analysis of Coal and Gas Co？extraction 9.2 Benefits Analysis of Gas Drainage Utilization References
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