矿柱破坏过程及其声发射规律的数值模拟

运用一个岩石破裂过程分析ＲＦＰＡ２Ｄ系统，对矿柱的破坏过程进行了数值模拟研究．矿柱被看成是非均匀脆性岩石材料．模拟结果再现了矿柱从变形到破坏的全过程及其声发射规律．结果表明，劈裂是矿柱破坏的主要形式，并首先在矿柱表面出现，然后再形成由表及里的破裂扩展直至矿柱最后产生剪切破坏．

NUMERICAL SIMULATION ON PILLAR FAILURE AND ASSOCIATED ACOUSTIC EMISSIONS

By using a Rock Failure Process Analysis code (RFPA2D), pillar failure process and associated seismicity were numerically studied. The pillar was considered as a brittle and heterogeneous material. The phenomena of progressive failure leading to collapse and induced seismicity in pillar were numerically demonstrated. It is shown that splitting is the main feature of the pillar failure mode. The splitting initiated first in the two sides of the pillar and then to the center. Finally, a macro shear failure mode was observed.