CHAPTER 1 INTRODUCTION 1．1 Longwall Mining 1．2 Purpose and Scope 1．2．1 Purpose 1．2．2 The scope of study area 1．3 Literature Review 1．3．1 Aquifer protection in ]ongwall mining 1．3．2 Effect of overburden depth 1．3．3 Hydraulic effect of panel width to overburden depth ratio 1．3．4 Groundwater modeling 1．4 Research Purpose and Methodology CHAPTER 2 GEOLOGY 2．1 Characterization of Regional and Local Geology of Study Area 2．1．1 Permian-Dunkard Group 2．1．2 Pennsylvanian age-Monongahela Group 2．1．3 Quaternary system 2．1．4 Hydrogeology 2．2 Lithologic and Strength Characteristics of the Overburden Strata 2．3 Description and Construction of Study Area 2．3．1 Mining conditions 2．3．2 Site description CHAPTER 3 DETERMINATION OF HYDRAULIC PARAMETERS 3．1 Introduction 3．2 Construction and Installation of Water Wells 3．2．1 WI water well 3．2．2 W2 water well 3．2．3 W3 water well 3．2．4 W4 water well 3．3 The Installation of Water Elevation Data Logger 3．4 Slug Test to Determine the Hydraulic Conductivity 3．5 Water Level Data before Mining Panel B6 3．6 Post Mining Panel B6 Water Levels 3．7 Slug Tests to Determine the Post-mining of Panel B6 Hydraulic Conductivity 3．8 Summary 3．8．1 Before mining Panel B6 3．8．2 Post mining Panel B6 CHAPTER 4 GROUNDWATER MODELING 4．1 Purpose of Groundwater Modeling 4．2 Groundwater Modeling Program 4．3 Theory of Groundwater Modeling 4．4 Concept Model and Grid Design 4．4．1 Concept model design 4．4．2 FEM mesh generate and boundary conditions 4．5 Pre-subsidence Groundwater Flow System in Panel B6 and B5 4．5．1 Pre-subsidence hydraulic conductivities selection in model 4．5．2 Pre-subsidence boundary condition and water table in model 4．6 Post-subsidence Groundwater Flow System 4．7 Summary and Conclusions CHAPTER 5 SUMMARY AND CONCLUSIONS REFERENCES
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