Sealing of Boreholes and Underground Excavations in Rock

• 1. Introduction.- 1.1 Background.- 1.2 Sealing Requirements—Rules and Regulations.- 1.3 Current Practice.- 1.4 Recent Borehole Sealing Research—An Introductory.- Overview.- 1.5 Sealing of Shafts, Tunnels, Mine Adits, Portals and Drifts.- 1.6 Book Summary.- 1.7 The Future.- Acknowledgements.- 2. Laboratory Performance of Cement Borehole Seals.- 2.1 Introduction.- 2.2 Conceptual Approach.- 2.3 Experimental Apparatus.- 2.4 Experimental Procedures.- 2.5 Analysis.- 2.6 Summary of Test Results.- 2.7 Design Implications.- Acknowledgements.- 3. Strength Parameters of Cement Borehole Seals in Rock.- 3.1 Introduction.- 3.2 Push-Out Test Experimental Procedure.- 3.3 Push-Out Test Mechanical Interactions.- 3.4 Finite Element Analysis and Discussion.- 3.5 Push-Out Test Results and Discussion.- 3.6 Conclusions and Recommendations.- Acknowledgements.- 4. Dynamic Loading Impact on Cement Borehole Seals.- 4.1 Introduction.- 4.2 Experimental Methods.- 4.3 Flow Test Results.- 4.4 Dye Injection Test Results.- 4.5 Dynamic Loading Test Results.- 4.6 Design Considerations.- 4.7 Discussion.- 4.8 Conclusions.- Acknowledgements.- 5. Performance of Bentonite and Bentonite/Crushed Rock Borehole Seals.- 5.1 Introduction.- 5.2 Materials.- 5.3 Permeability Tests and Results.- 5.4 Piping and Flow of Bentonite.- 5.5 Prediction of Bentonite Permeability.- 5.6 Conclusions and Recommendations.- Acknowledgements.- 6. In situ Performance of a Clay-Based Barrier.- 6.1 Introduction.- 6.2 The Canadian Nuclear Fuel Waste Management Program.- 6.3 Evaluation of Buffer Physical Performance.- 6.4 In situ Experiments.- 6.5 Buffer/Container Experiment.- 6.6 Isothermal Test.- 6.7 Conclusions.- Acknowledgements.- 7. In situ Hydraulic Performance Tests of Borehole Seals: Procedure and Analyses.- 7.1 Introduction.-7.2 Proposed Test Schemes.- 7.3 Seal Tests.- 7.4 Conclusions.- Acknowledgements.- 8. In situ Hydraulic Performance of Cement Borehole Seals.- 8.1 Introduction.- 8.2 Preliminary Survey for Seal Installation.- 8.3 Seal Tests at Oracle Ridge Mine.- 8.4 Discussion of Testing at Oracle Ridge Mine.- 8.5 Seal Testing at Superior, Arizona.- 8.6 Recommendations for Testing In situ Borehole Seals.- Acknowledgements.- 9. Sealing Boreholes in Rock Salt.- 9.1 Introduction.- 9.2 General Practice in Sealing Boreholes in Rock Salt.- 9.3 Rock Salt Properties Relevant to Borehole Sealing.- 9.4 Materials for Sealing Boreholes in Rock Salt.- 9.5 Seal System Performance.- 9.6 Design Considerations.- 9.7 Conclusions.- Acknowledgement.- 10. Design of Underground Plugs.- 10.1 Introduction.- 10.2 Types of Plugs.- 10.3 Factors to be Considered in Design of Plugs.- 10.4 Design Calculations.- 10.5 Construction Aspects.- 10.6 Plug Sealing and Resistance to Leakage.- 10.7 Case Studies.- 10.8 Conclusions and Recommendations.- 11. Design of Borehole Seals: Process, Criteria and Considerations.- 11.1 Introduction.- 11.2 Applications, Objectives and Requirements.- 11.3 Considerations of Site Characteristics.- 11.4 General Design Criteria.- 11.5 Material Selection and Placement Methods.- 11.6 Summary.- Acknowledgements.- 12. Sodium Bentonite as a Borehole Sealant.- 12.1 Introduction.- 12.2 Geographical Origin.- 12.3 Geological Origin.- 12.4 Structure of Sodium Bentonite.- 12.5 Properties of Sodium Bentonite.- 12.6 Bentonite as a Borehole Sealant.- 12.7 Bentonite as an Annular Sealant.- 12.8 Types of Bentonite Sealants.- 12.9 Placement of Bentonite.- 12.10 Case History Featuring High-Solids Bentonite Grout.- 12.11 Conclusions.

...anyone who has to deal with the problems of installing safe and reliable long term seals in a borehole will benefit from reading some of the papers in the book - Geoscientist