Accurate Identification of Broken Rock Mass Structure and Its Application in Stability Analysis of Underground Caverns Surrounding Rock

In view of the broken rock mass in surrounding large underground caverns, 3D distribution model joints is obtained through on-site investigation and digital imaging technology, image processing software. Based on analysis mutual cutting degree geometric shape block, concepts calculation methods fragmentation bite are proposed, quantitatively described. Furthermore, multi-factor method used to establish quality evaluation standard based bite, failure mode safety criterion proposed. Applying discrete element numerical method, mechanical parameters different masses obtained. The reinforcement shows that fragmentation, classification proposed this paper can implement precise measures for masses, as it provides an important theoretical basis caverns has wide applicability.