METHOD FOR PREDICTING DESTRUCTION OF ROCK MASSIF AND DEVICE FOR REALIZATION OF SAID METHOD Russian patent published in 2006 - IPC E21C39/00 

FIELD: mining industry, possible use for predicting destruction of rock massifs.

SUBSTANCE: method includes registration of electromagnetic radiation signals, measuring durations thereof, registration of beginning of appearance of periodic low frequency oscillations of electromagnetic radiation signals and measuring durations of their periods. Simultaneously with registration of electromagnetic radiation signals, their spectrum-temporal characteristics are registered for portion of massif, and simultaneously with beginning of appearance of periodic low frequency oscillations of electromagnetic radiation signals, beginning minimal value f₁ of upper frequency of spectrum is determined, at which aforementioned characteristics begin to shift towards high frequency section of spectrum. On basis of beginning of shift, beginning of disruption of section integrity is detected. On basis of simultaneous following increase of durations of periods of low frequency oscillations and upper frequency of spectrum up to values f₂,f₃,...,f_n-1, at which aforementioned shift continues, development of integrity disruption process is evaluated. When upper frequency of spectrum reaches final maximal value f_n=(2÷2,45)f₁, critical condition of section integrity is detected, after which its destruction takes place. Device includes serially connected electromagnetic transformer-antenna, amplifier, low frequency filter, analog-digital converter, memory device and device for calculating upper frequency of spectrum. First output through limiter of upper frequency of spectrum from below is connected to input of device for its display. Second output of computing device is connected to input of device for comparing values f₁..., f_n-1 of upper frequency of spectrum to its value f_n, output of which is connected to danger signal indicator.

EFFECT: 2 cl, 3 dwg.

2 cl, 3 dwg