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- W580415097 abstract "THE RELATIVE STABILITY OF THE ROCK MASS IN THE WALLS OF THE MORROW POINT POWERPLANT EXCAVATION WAS INVESTIGATED BY THE FOLLOWING MEASUREMENTS: (1) CONVERGENCE, (2) DEFLECTION OF THE ROOF ARCH, (3) RELATIVE MOVEMENTS OF POINTS WITHIN THE INTERIOR OF THE ROCK MASS WITH RESPECT TO LOCATIONS ON THE SURFACE OF THE ROOF ARCH, (4) ROCK-BOLT LOADS FOR BOLTS LOCATED IN THE ROOF AND SIDEWALLS OF THE EXCAVATION. A DESCRIPTION IS GIVEN OF THE INSTRUMENTATION, INSTALLATION TECHNIQUES, AND THE METHODS FOLLOWED IN MAKING THE MEASUREMENTS. THE VARIOUS TYPES OF MEASUREMENTS DESCRIBED PROVIDED AN ADEQUATE CONTROL FOR DETECTING UNSTABLE ROCK DURING EXCAVATION OF THE POWERPLANT CHAMBER. ROCK MOVEMENTS, AS DETERMINED BY THE MEASUREMENTS WERE PRODUCED BY MOVEMENT OF ROCK MASS ADJACENT TO THE POWERPLANT EXCAVATION RATHER THAN LOCAL MOVEMENT OF A PORTION OF THE ROCK IN THE ROOF OR SIDES OF THE EXCAVATION. MEASUREMENTS WITHIN AN UNDERGROUND CHAMBER DURING ITS EXCAVATION ARE DIFFICULT TO MAKE, BECAUSE REFERENCES AND OTHER EMBEDDED INSTRUMENT COMPONENTS MAY BE DISTURBED OR DAMAGED BY FLYING ROCK DURING BLASTING AND BY MOVING CONSTRUCTION EQUIPMENT. TO OBTAIN ACCURATE READINGS, SHIELDS, COVERS, BUMPERS, AND OTHER PROTECTIVE DEVICES ARE REQUIRED. A MARKED INCREASE WAS NOTED IN ROCK MOVEMENTS AND ROCK-BOLT LOADS AT THE LEFT WALL OF THE EXCAVATION DURING PERIODS OF INTENSIVE BLASTING." @default.
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- W580415097 date "1966-01-01" @default.
- W580415097 modified "2023-09-23" @default.
- W580415097 title "ROCK STABILITY MEASUREMENTS FOR UNDERGROUND OPENINGS" @default.
- W580415097 hasPublicationYear "1966" @default.
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