This book targets to earth scientists and engineers, in particular students, researchers, managers, and practitioners, who are interested in mining engineering, environmental engineering, green coal mining, sustainable water resource management, and effective measures to balance mine safety and ecological conservation.
In the disciplines of mine hydrogeology and mining engineering, there have always been difficulties in the theoretical interpretation of the changes in the physical and hydraulic characteristics of water resisting strata during coal seam mining. In the past 10 years, the authors studied the relevant contents by using the methods of physical simulation, numerical simulation, field test and mining practice of similar materials, so as to understand the internal relationship between the stratigraphic sedimentary characteristics of the mining area and the occurrence mechanism of mine water disaster. On the premise of analyzing and studying the stratigraphic sedimentary environment in the mining area in detail, it is of great significance for the realization of "coal water" dual resource mining in the mining area to divide the types of roof water disaster in the mining area and study the formation mechanism of mine water disaster caused by different rock formation combinations and mining methods.
Author(s): Yifan Zeng, Zhenzhong Pang, Qiang Wu, Hui Qing Lian, Xin Du
Series: Professional Practice in Earth Sciences
Publisher: Springer
Language: English
Pages: 366
City: Cham
Preface
Acknowledgments
Contents
1 Introduction
1.1 Research Purpose and Significance
1.2 Research Status
1.2.1 Research Progress of Rock Mass Damage and Permeability Under the Influence of Mining
1.2.2 Research Status of Evolution Characteristics of Overburden Fissure Channel
1.2.3 Research Status of Influence of Mining Intensity on Aquifer and Aquifuge
1.2.4 Status of Research on the Prediction Method and Prevention Technology of Mine Water Inrush
1.2.5 Research Status of Response Characteristics of Soil Damage to Mining Intensity
1.2.6 “Coal-Water” Dual Resource Coordinated Mining Theory and Technology
1.3 Main Contents of This Book
1.3.1 Main Research Contents
1.3.2 Technical Route
References
2 Overview of the Study Area
2.1 Physical Profile
2.1.1 Location, Scope and Traffic
2.1.2 Topography and Geomorphology
2.1.3 Hydrographic Net
2.1.4 Meteorology
2.2 Geological Overview
2.2.1 Stratum
2.2.2 Coal Seam
2.3 Hydrogeological Conditions
2.3.1 Aquifer
2.3.2 Aquifuge
2.3.3 Groundwater Recharge, Runoff and Discharge Conditions
2.4 Summary
3 Research on Deformation Damage and Permeability Evolution of Overlying Formations
3.1 Analysis of Stress-Seepage Evolution Zoning Characteristics of Mining Overburden Rock
3.1.1 Characteristic Response of the Mine Water Damage to the Rock Cover Damage
3.1.2 Analysis of Fracture Propagation and Permeability Zoning Characteristics of Mining Overburden Rock
3.2 Materials and Methods of Overburden Stress-Seepage Test
3.2.1 Collection and Preparation of Test Rock Mass
3.2.2 Test Equipment and Test Loading Path
3.3 Analysis of Sandstone Deformation Damage and Permeability Characteristics Under the Influence of Mining Stress Path
3.3.1 Analysis of Sandstone Deformation and Damage Under Mining Stress
3.3.2 Analysis of Sandstone Permeability Characteristics Under Mining Stress
3.4 Summary
References
4 Research on the Influence of Coal Mining on the Evolution of Groundwater Circulation
4.1 Hydraulic Properties of Roof Clay Aquiclude
4.1.1 Mechanical Index of Roof Clay Aquiclude
4.1.2 Water Isolation Analysis of Roof Clay Waterproof Layer
4.2 Characteristics of Competent Bedrock Waterproof Layer in Thin Bedrock Area
4.3 Stratigraphic Combination Characteristics of Roof Waterproof Layer of Coal Seam 3–1 in Jinjie Mine
4.4 Variations in the Hydraulic Properties of the Top Plate Water Barrier Before and After Mining
4.4.1 Groundwater Level Change in the Case of Evacuation and Drainage
4.4.2 Hydraulic Properties of Roof Aquiclude
4.4.3 Variation of Water Circulation Pathway
4.4.4 Impact of Roof Slab Water Barrier Failure on Surface Trench Flow
References
5 Exploration and Analysis of the Law of Overburden and Surface Ecological Damage Caused by Mining
5.1 The Height of Water Conduction Fracture Zone is Divided by Field Measurement and Bedrock Thickness
5.1.1 Field Measurement Means and Methods
5.1.2 Analysis of Measured Results
5.1.3 Analysis of Fitting Calculation Equation for Water Conducting Fracture Zone
5.1.4 Bedrock Thickness Division Based on the Height of Water Conducting Fissure
5.2 Measurement and Degree Analysis of Surface Ecological Damage Under High Intensity Mining
5.2.1 Overview of Surface Ecological Damage Caused by Coal Seam Mining
5.2.2 Measurement Method of Surface Ecological Damage Caused by Coal Seam Mining
5.2.3 Analysis of Surface Ecological Damage Degree in Mining Area
5.2.4 Surface Movement Law of Coal Seam Mining
5.3 Summary
References
6 Physical Simulation Study of Mine Water–Sand Inrush Under the Fluid–Structure Interaction
6.1 Overview
6.2 Mechanism and Criterion of Water–Sand Inrush
6.2.1 The Theoretical Model of “Extreme Hydraulic Gradient”
6.2.2 The “Pseudo-Structure” Theoretical Model
6.2.3 Fluid Characteristics of “Water–Sand Mixed Flow”
6.3 Similar Simulation Experimental Study of Water–Sand Inrush
6.3.1 Experimental Purpose
6.3.2 Experimental Method
6.3.3 Experimental System Development
6.3.4 Similar Simulation Material Ratio Experiment
6.3.5 Similar Simulation Model Design
6.3.6 Experimental Process and Result Analysis
6.3.7 Analysis of Overlying Rock Stress and Water Pressure Change Process
6.4 Analysis of Key Factors in the Process of Water–Sand Inrush
6.4.1 The Effect of Particle Size on the Permeability of Aquifers
6.4.2 Key Factors of Sand Body Movement After Fracture Formation
6.5 Summary
References
7 Numerical Simulation Study on Mine Water–Sand Inrush Under Fluid–Solid Coupling
7.1 Overview
7.2 Mathematical Modeling of Fluid–Solid Coupling
7.3 Numerical Simulation of Stress Field and Seepage Field Coupling
7.3.1 Field Condition
7.3.2 Calculation Model Design and Selection of Calculation Parameters
7.3.3 Fluid–Solid Coupling Numerical Simulation Analysis of Roof Water–Sand Inrush Mechanism Under Mining Influence
7.4 Summary
References
8 Water Inrush Mode and Prevention Technology Under Bedrock Fissure Aquifers
8.1 Analysis of Main Factors Affecting Water Yield of Aquifer
8.2 Basic Principle of Water Abundance Index Method
8.3 Water Abundance Evaluation and Division of Coal Roof Aquifer Based on Water Abundance Index Method
8.3.1 Water Abundance Evaluation and Zoning of Fractured Aquifers in Weathered Bedrock
8.3.2 Water Richness Evaluation and Zoning of Pore-Fissure Aquifer in Burnt Bedrock of 2−2 Coal, 3−1 Coal and 4−2 Coal
8.4 Safety Evaluation and Zoning of Roof Caving in Coal Seam
8.4.1 Calculation of Height of Water Conduct Fractured Zone in 2−2 Coal Seam Roof
8.4.2 Safety Zoning of Roof Caving in 2−2 Coal Seam
8.4.3 Calculation of Height of Water Conduct Fractured Zone in 5−2 Coal Seam Roof
8.4.4 Safety Zoning of Roof Caving in 5−2 Coal Seam
8.5 Risk Assessment and Zoning of Water Inrush from Water-Filled Aquifer in Coal Seam Roof
8.5.1 Risk Assessment and Zoning of Water Inflow in Fractured Aquifer of Roof Weathered Bedrock of 2−2 Coal Seam
8.5.2 Water Inrush Risk Assessment and Zoning of 5−2 Coal Seam Roof Weathered Bedrock and Burnt Bedrock Aquifer
References
9 Water–Sand Inrush Mode and Prevention Technology Under Bedrock Fissure and Loose Pore Aquifer
9.1 The Main Controlling Factors Affecting the Occurrence of Water–Sand Inrush Break Disasters
9.1.1 Thickness and Physical Characteristics of Water-Bearing Sand Layer
9.1.2 Influence of Aquifer Abundance and Recharge Quantity
9.1.3 Effective Clay Layer Thickness and Physical Properties
9.1.4 The Ratio of the Thickness of Loose Bed to the Thickness of Bedrock
9.1.5 Development Range and Height of Mining Fissures
9.2 Mechanism Analysis of Water–Sand Inrush Disaster Induced by Mining
9.2.1 Key Layer Definition
9.2.2 Establishment of Mechanical Catastrophe Model of Water–Sand Inrush
9.2.3 Mechanical Catastrophe Criterion of Water–Sand Inrush
9.3 Weight Coefficient Determination of Main Controlling Factors of Water–Sand Inrush in Overburden Rock Based on AHP
9.3.1 Main Controlling Factors System of Water–Sand Inrush Based on AHP
9.3.2 Normalization of Main Control Factors
9.3.3 Weight Determination of Main Controlling Factors of Water–Sand Inrush Based on AHP
9.4 Quantitative Evaluation Criteria and Zoning Evaluation of Water–Sand Inrush Break Risk of Overlying Rock Under Mining
9.4.1 Quantitative Evaluation Criterion of Water–Sand Inrush Risk Based on AHP
9.4.2 Zoning Evaluation and Parameter Uncertainty Analysis of Hazardous Results
References
10 Feasibility Analysis of Safe Coal Mining Under Qingcaojiegou and Hezegou Water Bodies
10.1 Study Area
10.2 Analysis of Geological Conditions of Coal Pressing Area Under Qingcaojiegou Water Body
10.2.1 Surface Water Body Conditions
10.2.2 Hydrogeological Conditions
10.2.3 Engineering Geological Conditions
10.3 Analysis of Mining Grade of Water Body
10.4 Height Analysis of Water-Conducting Fracture Zone in Overlying Strata
10.4.1 According to the “Regulations for Coal Pillar Setting and Coal Pressure Mining of Buildings, Water Bodies, Railways and Main Roadways”
10.4.2 Hydrogeological and Engineering Geological Exploration Code for Mining Area
10.5 Basis for Setting up Safe Coal and Rock Pillars
10.5.1 Basis for Setting up Safe Coal and Rock Pillars
10.5.2 Design Calculation of Safe Coal and Rock Pillar Retention
10.6 Safe Mining Scheme Under Hezegou and Qingcaojiegou Water Bodies
10.6.1 Main Coal Mining Methods Under River Pressure
10.6.2 Filling Mining Scheme of Longwall Working Face
10.7 Summary
References
11 “Coal-Water” Dual Resource Coordinated Mining Technology System
11.1 Analysis of Contradiction Between Coal Mining and Stratigraphic Ecological Environment
11.1.1 Coexistence Characteristics of Coal and Water in Yushenfu Mining Area
11.1.2 Ecological and Environmental Problems Caused by High-Intensity Mining in Yushenfu Mining Area
11.2 Discussion on the “Coal-Water” Dual Resource Coordinated Mining Mode
11.2.1 The Theory of “Coal-Water” Dual Resource Coordinated Exploitation
11.2.2 Determine the Ecological Environment Bearing Characteristics of the Mining Area
11.2.3 Connotation of Water Control and Coal Mining in Ecologically Fragile Mining Areas
11.2.4 Water-Controlled Coal Mining Mode in Ecologically Fragile Mining Areas
11.3 Summary
References
