METHOD OF INVESTIGATING DESTRUCTION OF SOLID UNDER LOAD EFFECT BY ITS ELECTROMAGNETIC RADIATION Russian patent published in 2009 - IPC E21C39/00 G01N33/24 

FIELD: mining.

SUBSTANCE: invention refers to mining and to non-destructible methods of diagnostics and can be employed at investigation of solid body destruction in form of samples of iron under bending load. The method consists in registering a commencement of high frequency oscillations occurring in electromagnetic radiation (EMR) signal (the stage of linear deformations) and in registering a commencement of periodical low frequency oscillations occurring in EMR signal (the transitive stage and the stage of not-linear deformations). The state of iron under load in the transitive stage is assessed on base of changes in time t of coefficients determined experimentally. The process of destruction of the sample is evaluated on these coefficients, that is: transition of iron into a quasi-plastic state with phenomenon of quasi-resonance, a pre-critical state, transition to resonance phenomenon (termination of existence in the quasi-plastic state), transition into the critical state, and development of resonance phenomenon (destruction of the sample into fragments).

EFFECT: upgraded credibility of investigations for prognostication of stages of sample destruction.

2 cl, 2 dwg, 1 tbl