METHOD FOR MONITORING AND PREDICTING STRENGTH OF HARDENING FILLING MASS Russian patent published in 1999 - IPC

FIELD: mining industry. SUBSTANCE: this method is intended for solving problem of long-term monitoring for strength of hardening mass, optimization of mining operations with simultaneous simplifying design of sensor and measuring procedure. According to method, used in function of sensor for current value of cubic electrical resistance of hardening filling mass is length of current-conducting chemically-neutral thread with final distributed resistance. According to measured values of cubic electrical resistance, obtained is its dependence on time. According to this dependence, determined is speed of changing of value of cubic electrical resistance. Measured is ultimate strength of filling material sample taken at moment of time when value of cubic electrical resistance is equal to two thirds of maximal possible value. According to obtained values of ultimate strength of sample and speed of changing value of cubic electrical resistance, predicted is strength of hardening mass. EFFECT: higher efficiency. 2 dwg