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岩爆是引水隧洞中常见的地质灾害,针对岩爆预测中存在随机性和模糊性的问题,建立了基于熵—云耦合的岩爆预测模型。选取引水隧洞的岩石脆性指数Is、单轴抗压强度与岩石抗拉强度之比σc/σt、弹性变形能指数Wet、岩石切向应力与单轴抗压强度之比σθ/σc构建评价指标体系,并建立了相应的评价准则,采用熵权法确定指标权重,根据云模型正向发生器生成正态云滴,实现了岩爆等级预测。最终通过工程实例建模计算,验证了该方法的合理性和可行性,可为类似工程提供借鉴。
Rockburst is a common geological disaster in diversion tunnel. Aiming at the problem of randomness and fuzziness in rock burst prediction, a rockburst prediction model based on entropy-cloud coupling is established. The rock fragility index Is, the ratio of uniaxial compressive strength to rock tensile strength σc / σt, the elastic deformation energy index Wet, the ratio of rock tangential stress to uniaxial compressive strength σθ / σc are selected to construct the evaluation index System, and establishes the corresponding evaluation criteria. The entropy weight method is used to determine the index weights. Normal cloud droplets are generated according to the forward model of the cloud model, and the rock burst level prediction is achieved. Finally, through the engineering example modeling and verification, the method is proved to be reasonable and feasible, which can provide reference for similar projects.