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- 2018
基于岩体三维裂隙网络模型的随机块体稳定分析
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Abstract:
利用蒙特卡洛模拟方法和三维地质建模技术建立多边形离散裂隙网络与工程岩体的耦合模型, 并对随机块体进行了识别分析, 提出了一种新的随机岩石块体支护分析方法．根据空间坐标和地质属性对耦合模型进行分区, 统计各个区域内块体的埋深、体积和密集度, 研究随机块体的空间分布规律; 在自重和地震两种情况下分别计算各区域的块体失稳概率和支护强度．通过以上参数的计算和分析, 为锚杆间距、长度和锚杆支护力提供参数化指导, 同时也可对支护方案进行检验．最后将该方法应用于某取水隧洞岩体支护分析中．
Based on Monte Carlo simulation method and 3D geological modeling technology，a rock mass structure model with polygonal discrete fracture network was reconstructed and the identification of stochastic rock blocks was conducted. Then，a new approach of stability and support analysis for stochastic rock blocks of tunnels was presented. The model was divided into several subareas according to positions and geological attributes. And the depths，the volume and tensity of blocks were calculated to study the rule of block distribution in each subarea. The instability probabilities and support intensities of stochastic rock blocks under self-weight and seismic condition were calculated as well. These parameters contribute to the determination of the bolt spacing，lengths and support force of single bolt and provide parametric guidance to design a support scheme of stochastic rock blocks in the tunnel. Meantime it can also be used in support scheme test. This method has been applied to the stability support of an intake tunnel
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