TUNNELLING TRIALS IN CHALK. Available to Purchase

TRRL, TRANSPORT AND ROAD RESEARCH LABORATORY, MOTT HAY AND ANDERSON, NEWCASTLE UNIVERSITY, NEW SOUTH WAL, SIR ROBERT MCALPINE, TUNNELLING, LOWER CHALK, SHIELDS, MACHINERY, MACHINES, ORGANISATION, SCALE, CONTRACTS, COLLECTION, TESTS, CUTTERS, CHARACTERISTICS, MASS, NUMERICAL, POWER, MOVEMENT, GEOTECHNICS, TRIALS, FORMATION, TUNNELS, OBJECTIVES, PRELIMINARY, LABORATORIES, RESEARCH, PROCESSING, PERFORMANCE, PICKS, HEADS, GROUND, PROPERTIES, TOOLS, SITE INVESTIGATION, REACTIONS, MEASUREMENT, CHALK, FULL FACE, BORING, MANAGEMENT, PILOT, STUDIES, DATA, SYSTEMS, ARRAYS, CUTTING