Page 9 - Rock Mechanics For Underground Mining

CONTENTS

13.9 Yielding pillars 405
Problems 406

14 Artificially supported mining methods 408
14.1 Techniques of artificial support 408
14.2 Backfill properties and placement 410
14.3 Design of mine backfill 416
14.4 Cut-and-fill stoping 419
14.5 Backfill applications in open and bench stoping 423
14.6 Reinforcement of open stope walls 428

15 Longwall and caving mining methods 430
15.1 Classification of longwall and caving mining methods 430
15.2 Longwall mining in hard rock 430
15.3 Longwall coal mining 440
15.4 Sublevel caving 453
15.5 Block caving 465
Problems 481

16 Mining-induced surface subsidence 484
16.1 Types and effects of mining-induced subsidence 484
16.2 Chimney caving 486
16.3 Sinkholes in carbonate rocks 495
16.4 Discontinuous subsidence associated with caving
methods of mining 496
16.5 Continuous subsidence due to the mining of
tabular orebodies 506
17 Blasting mechanics 518

17.1 Blasting processes in underground mining 518
17.2 Explosives 518
17.3 Elastic models of explosive–rock interaction 521
17.4 Phenomenology of rock breakage by explosives 522
17.5 Computational models of blasting 527
17.6 Perimeter blasting 527
17.7 Transient ground motion 532
17.8 Dynamic performance and design of underground excavations 536
17.9 Evaluation of explosive and blast performance 538

18 Monitoring rock mass performance 543
18.1 The purposes and nature of monitoring rock
mass performance 543
18.2 Monitoring systems 544
18.3 Examples of monitoring rock mass performance 558

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