FORECAST METHOD FOR ROCK FRAGMENTATION Russian patent published in 2008 - IPC E21C39/00 

FIELD: mining.

SUBSTANCE: invention concerns mining and it is used for forecasting and control of rock fragmentation. Method includes recording of electromagnetic radiation (EMR) waves, these waves width measurement and additionally simultaneous width measurement of T_i follow periods of these waves, load to massif area, looking after its increase till maximum with further fall, and speed V_i of its falling. According to decrease beginning T_i till T_"н" (where T_"н" - duration of follow periods of EMR waves, from which starts its decreasing) and simultaneous increase of V_i till V_l (where V_l - speed of load falling at researched area of massif, from which it is started its increasing) it is judged about beginning of massif area discontinuity. Then according to further simultaneous decrease T_i till T_(n-1) and further increase V_i till V(_n-1) it is judged about development of discontinuity process of massif area, and according to specified ratios for n-period of waves EMR follow it is judged about critical state of massif area discontinuity, after which its fragmentation starts.

EFFECT: increasing of forecast trustworthiness at the expense of receiving additional information about condition of rock area before the beginning of its fragmentation and process development detailed elaboration.