Gladkaya E. Estimation of rock massif condition for prediction of low amplitude disjunctive dislocations and outburst hazard

Rock massif condition estimation procedures using physical and mechanical properties of rocks are presented in the thesis with the aim to develop methods of low amplitude disjunctive dislocations and outburst hazard prediction for sandstones around development workings in flat seams. A new approach to forecasting disjunctive dislocations with fault throws below 3 m as well as outburst risk in sandstones is outlined in the work based on measured values of rocks fracture toughness. Results of this work were put into base of the prediction method allowing forecasting location of a low amplitude disjunctive dislocation during mine development with the accuracy about 3 m. Advanced outburst risk estimation method has been proposed for sandstones using effective surface energy values taking into consideration both structural phase transitions and sinchronism in variations of fracture toughness and elastic characteristics.