METHOD FOR DETECTION OF STRESSED CONDITION OF ROCKS Russian patent published in 2010 - IPC E21C39/00 

FIELD: mining.

SUBSTANCE: method for detection of stressed condition of rock mass includes setting required detail of mass survey, installation of sensors in wells drilled from exposed surface deep down in mass, registration of electromagnet and seismic-acoustic signals radiated by natural sources in rock mass and detection of these signals' parametres. At the same time pitch of measurement is selected in compliance with required detail; width of sliding space window covering several serially arranged points of measurement is set, for multiple pairs of parametre values of registered signals corresponding to one and the same points within space window; correlation ratio is defined, and its value is put in compliance with the medium point of space window, and if correlation ratio value is positive, stressed condition of rock mass in this point is referred to prelimit stage, and in case it is negative - to out-of-limit stage of deformation. Width of space window is selected under the condition of statistical significance of correlation ratio.

EFFECT: increased accuracy of detection of rock mass stressed condition.

4 dwg