基于物元分析與云模型的地下工程圍巖穩(wěn)定性評價
[Abstract]:In view of the fuzziness and the stochastic problems existing in the quality evaluation of the rock mass in the past, according to the rock quality index, the uniaxial saturated compressive strength of the rock and the rock mass integrity coefficient, The evaluation index system of the stability of the surrounding rock of the underground engineering is set up according to the strength coefficient of the structural plane and the 5 indexes of the underground water seepage. Based on the matter-element analysis method, the importance of the evaluation index is determined by calculating the validity of the expert evaluation matrix and the element of the synthetic weight. According to the determined evaluation criteria, the evaluation factors are obtained under the comprehensive cloud model at all levels, and the membership degree of each evaluation level corresponding to each evaluation factor is firstly calculated through the forward cloud generator according to the measured data of the second-phase underground engineering rock mass of the Guangzhou Pumped Storage Power Station. And then combining with the weight of the rock mass to obtain the composite membership degree, and then judging the grade of the rock mass stability according to the maximum membership degree. in that method, the result of the evaluation obtained by the method is compared with a reduction concept lattice-fuzzy preference evaluation method, a rough set and an approach ideal solution (RS-TOPSIS), and the judgment grade is consistent, so that the method is accurate and reliable, and the learning process on a large number of samples is avoided, The fuzzy randomness generated by the qualitative and quantitative numerical values of the evaluation indexes can be overcome, and the evaluation of the stability of the rock mass of the underground engineering can be used.
【作者單位】: 中南大學(xué)資源與安全工程學(xué)院;湖南辰州礦業(yè)博士后協(xié)作研發(fā)中心;
【基金】:國家自然科學(xué)基金資助項目(51504286) 中國博士后科學(xué)基金資助項目(2015M572270) 湖南省科技計劃項目(2015RS4004)
【分類號】:TU457
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