基于变权TOPSIS模型的围岩质量评价方法研究

Research on Evaluation Method of Surrounding Rock Quality Based on Variable Weight TOPSIS Model

围岩质量评价是一个复杂的多目标风险决策问题。以反映围岩评价本质思想和关键概念为目标,选取了围岩的抗压强度(单轴)、岩石质量指标、岩体完整性系数、地下水发育状态、岩体声波速度、结构面走向与洞轴线夹角6个指标,运用均值化方法组合计算信息熵和变异系数法的指标权值,并结合TOPSIS法构建了围岩质量的评价模型;然后将该模型运用到新疆克州布伦口-公格尔水电站地下洞室4个标段的围岩质量评价。研究表明,模型计算结果与现场实测数据基本吻合,说明所建立的围岩质量变权TOPSIS评价模型能有效地得出合理理论。

Surrounding rock quality evaluation is a complex multi-objective risk decision-making problem.To reflect the nature of thought and the key concepts surrounding rock evaluation is the target,the selection of the surrounding rock uniaxial compressive strength and rock quality index,integrity coefficient of rock mass,groundwater development status,the trend of the acoustic wave velocity of rock mass,the structural plane and the hole axis Angle of six indicators,information entropy are calculated by using average method combination and variation coefficient method of index weights.Combined with TOPSIS method,the evaluation model of surrounding rock quality is established.Then the model is applied to the surrounding rock quality evaluation of four underground caverns of Bulunkou-Gongger Hydropower Station.The results show that the calculation results of the model are basically consistent with the field measured data,which indicates that the variable weight TOPSIS evaluation model established for surrounding rock quality can effectively obtain a reasonable theory.