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针对大型引水隧洞岩爆预测问题,构建了基于组合赋权的云模型。以引水隧洞的弹性变形能指数、单轴抗压强度与岩石抗拉强度之比、岩石脆性指数、岩石切向应力与单轴抗压强度之比作为评价指标体系,确定评价指标标准及云模型特征参数,采用云模型正向发生器生成云图,以投影寻踪法和Delphi法计算组合权重,进而求出综合确定度并给出岩爆预测等级。实例计算表明,大型引水隧洞岩爆预测精度达100%,从而验证了该方法合理有效。
Aimed at the rockburst prediction in large-scale diversion tunnel, a cloud model based on combination weighting is constructed. The indexes of elastic deformation energy index, ratio of uniaxial compressive strength to rock tensile strength, rock brittleness index, rock tangential stress and uniaxial compressive strength were taken as evaluation index system to determine the evaluation index standard and cloud model Feature parameters, the cloud model generated by the forward generator cloud graph, the projection pursuit method and the Delphi method to calculate the combined weight, and then determine the overall accuracy and give the rock burst prediction level. The calculation example shows that the prediction accuracy of rock burst of large diversion tunnel reaches 100%, which proves that the method is reasonable and effective.