DEVICE FOR ROCK MASS DEFORMATION MEASUREMENT Russian patent published in 1994 - IPC

FIELD: mining industry, mine surveying. SUBSTANCE: movable and fixed bench marks are connected via measuring pull rod 7. Measuring pull rod 7 passes through pipe 6. An end of measuring pull rod 7 is attached to metal pin 2 of the fixed bench mark, another end is secured on guiding pulley 27 of a displacement sensor. Guiding pulley 27 is disposed horizontally on concrete pad 10 and connected via extended cylindric shaft 28 to a primary transducer. Preliminary wound-up guiding pulley 27 provides for tensioning of measuring pull rod 7 by spiral spring 30. By deformations of the rock mass, measuring pull rod 7 turns guiding pulley 27 with extended cylindric shaft 28 and primary transducer. The displacement amount is proportional to the angle of displacement sensor shaft turning. A displacement amount signal is transmitted through communications lines to the central operation control room. EFFECT: enlarged operating capabilities. 4 dwg