The Study On Slope Stability Classification Method Using Neutrosophic Numbers Based On Similarity Measure

Yunnan province,located in the southwest of China,is more seriously threatened by landslides,debris flow and other geological disasters.Because Yunnan province is rich in mineral resources,the landslide disaster caused by open-pit mining gradually become a rising trend.In order to ensure the safety of activities around open pit mines,the first step is to prevent and control the slope landslide of the open-pit mine.Therefore,it is very necessary to carry out the research on the prevention and control of landslide in the open-pit mines in Yunnan province.In the process of landslide prevention,slope stability evaluation is an important link,and the selection of evaluation method is an important step in this link.Due to the large amount of incomplete and non-linear information in the slope,its parameters has strong uncertainty,many undeterministic analysis methods have been gradually applied to practical engineering.Although the results show that these methods are effective,the comparison shows that most of undeterministic analysis methods still have the problem of complicated calculation and reconditeness.Therefore,it is of great significance to propose a simple,accurate and reasonable undeterministic analysis method for evaluating slope stability in the actual projects.The slope stability evaluation method has different applicability to different types of slope in different regions.Therefore,it is of great theoretical and practical significance to select the most suitable evaluation method for the study area by comparing and analyzing different slope stability evaluation methods in the study area.Therefore,the research purpose of this paper includes two aspects:one is to solve the uncertainty of slope parameters,so that the evaluation method can be easily and accurately and reasonably applied in practice;the other is to establish a slope stability evaluation method for open pit mines in Yunnan province,so as to promote the task of disaster prevention and reduction in Yunnan province.This paper introduce the neutrosophic theory into the slope stability evaluation,and the uncertain information of slope parameters is expressed in the form of neutrosophic number.The clustering method based on the correlation coefficient of neutrosophic numbers is proposed to determine the grade number of slope stability.Then the combined weight method of G1 method and coefficient of variation method is introduced into the field of slope stability to calculate the reasonable weight value.On this basis,this paper propose four kinds of similarity measures of neutrosophic numbers to evaluate the slope stability in different grades,and finally makes a comparative analysis of the calculation results of the four methods to obtain the slope stability evaluation method which is more suitable for the open-pit mine in Yunnan province.The main research contents and results of this paper are as follows:（1）Through the field survey,the data of 32 open-pit mine slopes in Yunnan province were obtained,and the impact factors of slope stability were determined.The neutrosophic number is introduced to express the uncertain information of the slope data,and NNs of the slope data and evaluation table of impact factors for slope stability is obtained.Grades in the evaluation table will serve as examples of grades for subsequent evaluations.（2）A clustering analysis method based on the correlation coefficient of neutrosophic numbers is proposed to analyze the slope samples in the study area.According to the result of clustering,the slope can be divided into four grades,which are consistent with the original four grades of the slope.（3）G1 method and coefficient of variation method,were combined to obtain the combined weight values of three groups by using multiplicative synthesis and linear weighted synthesis whenβ₁=0.5 andβ₁=0.7.The combined weights obtained by the multiplicative synthesis is more suitable for the calculation of slope stability in this study area.（4）Four classification methods based on similarity measure are proposed by this paper,including tangent method,arctangent method,generalized Dice method and exponential method.The effectiveness of the four methods is verified by slope examples.In order to compare the applicability of the four methods,the data obtained by the four methods are processed by calculating the standard deviation of the measurement values of the four methods.The standard deviation calculation results are presented in the form of broken line graph,and the four methods are compared and analyzed.It is concluded that the arctangent method is more suitable for slope stability evaluation in the research area of Yunnan province,followed by exponential method,tangent method,and generalized Dice method is generally applicable.