Table of Contents

Chapter 1 Introduction
1．1 Background
1．2 Literature Review
1．2．1 Shaft lining failure
1．2．2 Treatment methods for shaft lining failure
1．3 Problem Statement
1．4 Scope and Objective
1．5 Outline

Chapter 2 Failure Mechanism of Shaft Lining in Eastern Chinese Coal Mines
2．1 Introduction
2．2 Overview of Target Coal Mine and Condition of Shaft Lining Failure
2．3 Numerical Analysis on Shaft Lining Failure and Aquifer
2．3．1 Numerical analysis model
2．3．2 Strength factor
2．3．3 Results and discussion
2．4 Effect of Strata Thicknesses on Stability of Shaft lining
2．4．1 Numerical analysis model
2．4．2 Results and discussion
2．5 Summary

Chapter 3 Development of a New Method and Its Application for Reinforcement of Shaft Lining
3．1 Introduction
3．2 Underground Continuous Impervious Curtain
3．3 Development of Construction Technique
3．3．1 Introduction
3．3．2 Performance of CCC
3．4 Application of CCC to Construction of UCIC
3．4．1 Field application
3．4．2 Available case analysis
3．5 Concept of UCIC Construction
3．6 Summary

Chapter 4 Analysis of Underground Continuous Impervious Curtain for Shaft Lining Treatment
4．1 Introduction
4．2 Effect of UCIC Connectionless with Shaft Lining
4．2．1 Numerical analysis model
4．2．2 Results and discussion
4．3 Effect of UCIC Next to Shaft Lining
4．3．1 Numerical analysis model
4．3．2 Results and discussion
4．4 Influence of Ranges and Materials on Effect of UCIC
4．4．1 Model for numerical simulation
4．4．2 Results and analyses
4．5 Effect of UCIC during Dynamic Process of Pore Water Pressure
4．5．1 Introduction
4．5．2 Fundamental assumption
4．5．3 Influence of aquifer drainage
4．5．4 Effect of UCIC
4．6 Summary

Chapter 5 Influence of Coal Extraction Operation on Shaft Lining and Treatment by Using Underground Continuous Impervious Curtain
5．1 Introduction
5．2 Numerical Analysis Model
5．3 Results and Discussion
5．3．1 Effect of the vertical distance between aquifer and mining panel
5．3．2 Effect of the distance between shaft and the mining panel
5．3．3 Measures for preventing the effect of extraction of mining panel on the stability of shaft lining
5．3．4 Additional treatment of shaft lining
5．4 Summary

Chapter 6 Conclusions And Recommendations
6．1 Conclusions
6．2 Recommendations
Reference Documentation

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