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TM 5-857-3 Design of Underground Installations in Rock: Space Layouts and Excavation Methods

TM 5-857-3 Design of Underground Installations in Rock: Space Layouts and Excavation Methods . 1961-04-01 TABLE OF CONTENTS INTRODUCTION 3-01 PURPOSE AND SCOPE 1 3-02 REFERENCES 1 a. References to Material in Other Manuals of This Series 1 b. Bibliography 2 3-03 RESCISSIONS 2 3-04 MANUAL PREPARATION 2 3-05 GENERAL 2 3-06 PROCEDURES 3 CONFIGURATION OF OPENINGS 3-07 FACTORS 3 3-08 SHAPE 4 3-09 SIZE OF OPENINGS 5 3-10 PILLARS BETWEEN PARALLEL CHAMBERS 6 3-11 TUNNELS AND CHAMBERS 6 PRIMARY ENTRANCES 3-12 TYPES OF ENTRANCES 7 a. Horizontal 7 b. Slopes 7 c. Vertical Shafts 8 d. Combinations 8 3-13 CROSS SECTION 9 3-14 DUPLICATION AND DISPERSAL 10 3-15 ENTRANCE DESIGN 10 3-16 BLAST DOORS 11 3-17 DECONTAMINATION 11 3-18 PROTECTION OF PORTALS 11 3-19 DRAINAGE OF TUNNEL PORTALS 12 3-20 PORTAL LOCATION WITH REGARD TO GEOLOGY AND TOPOGRAPHY 12 3-21 SUPPORT OF PORTALS 12 3-22 COST AND PROGRESS OF ENTRANCES 13 SECONDARY OPENINGS 3-23 PURPOSES 13 3-24 TYPES OF SECONDARY ENTRANCES 13 3-25 LIMITATIONS OF BOREHOLES 13 3-26 PROTECTION OF SECONDARY ENTRANCES 15 SPACE LAYOUTS 3-27 REQUIREMENTS 15 3-28 EFFECT OF CHAMBER SIZE, DESIGN, AND ARRANGEMENT ON UNIT COSTS 16 3-29 ARRANGEMENT OF CHAMBERS l6 3-30

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