THE SIGNIFICANCE OF ROCK FRACTURING IN THE DESIGN AND SUPPORT OF MINE EXCAVATIONS

摘要: Due to the specific nature of stress field around mining excavations volume rock fractured as a result is generally confined immediate vicinity these excavations. A narrow fracture zone often desirable feature since it tends move zones high concentrations further into mass and reduces support requirements. Removal protective can in uncontrolled enlargement underground The degree fracturing mine tunnels best described by strength criterion whereas an energy better for stoping