GEAR FOR ELECTROTHERMAL FORTIFICATION OF HOLE SHAFT Russian patent published in 2002 - IPC

FIELD: mining industry. SUBSTANCE: gear can be employed to fortify unstable and to insulate absorbing intervals of rock while constructing holes of various assignment with use of relatively fusible, ecologically pure composite grouting materials. Employment of gear secures potential for fixing separate sections of tectonic faults, for insulation of absorbing zones and fluid absorption over any intervals of deep holes of various assignment drilled in advance and filled with clayey and other mud. Gear includes tank, grouting heat generator, compactor with cone-shaped lug, power supply source, fusible fixing material, winch and load-bearing cable. Tank is filled up with fusible fixing material. Lower part of tank houses heat generator coming in the form of hollow cylinder with outlet in lower part. Heat generator and compactor with cone- shaped lug are made fast to rod. Cone-shaped lug of compactor is installed inside heat generator over its entire length. Lug forces molten fixing material out. Material is forced out through outlet under its own weight. Material is forced into space of hole when gear is lifted. Simultaneously walls of hole are fortified. EFFECT: fixing of separate sections of tectonic faults, insulation of absorbing zones. 1 dwg