力学性能对矿柱体系破坏影响的三维数值分析

在深部高应力等复杂地质条件下开采时，由多个矿柱构成的矿柱体系的稳定性对矿山安全生产至关重要.利用RFPA^3D-Parallel程序，研究了单轴抗压强度对串行和并行矿柱体系破裂过程的影响.结果表明，串行矿柱中强度较弱部分的失稳决定整个体系的稳定，对该段加固和监测有助于体系的稳定性控制;对并行布设的矿柱体系，其压力传递与柱的抗压强度密切相关，较弱柱先破坏，应力依次向强度较高的柱转移，直到矿柱系统失稳;可将声发射数的多峰现象或声发射累积增长阶梯型弧段作为矿柱体系中弱柱失稳破裂、应力向相邻强柱转移的依据.

3D Numerical Analysis for Effect of Mechanical Properties on Failure Process of Serial and Parallel Rock Pillar System

When mining in deep rock mass under high stress and complicated geological conditions， the stability of rock pillar system is quite important for safe-mining. A series of numerical simulations were conducted to evaluate the effect of uniaxial compressive strength on the failure processes of serial and parallel pillar systems by using the RFPA^3D-Parallel code. Results show that the stability of the serial pillar system depends on pillar of lower uniaxial compressive strength， which means that monitoring and reinforcement of the relatively weak pillar in the serial pillar system is quite essential to the stability control of the serial pillar system. For the parallel pillar systems， the pressure-transfer is closely related to the compressive strength of the pillars， that is， stress will be transferred from the weak pillar to the strong pillar till the failure of the whole pillar system. It is also found that the multi-peak phenomenon of the acoustic emission(AE) counts or the step-curve of the accumulative AE counts can be deemed as the hint of stress transfer from the fractured weak pillar to the nearby strong pillars.