Research On The Stability Of High Rock Slope In Gejiu Duimen Mountain Based On Reliability Method

As a kind of engineering that often appears in all kinds of basic engineering construction in our country and the world,the potential harm of rock slope engineering has been paid attention to by experts and scholars.However,the traditional and commonly used evaluation system of rock slope stability has some subjectivity and limitations,which can not comprehensively and objectively evaluate slope engineering stability.Based on the high rock slope of Gejiu Concentrator,a new system combining qualitative analysis,quantitative calculation and reliability analysis is used to evaluate the slope stability.The main contents are:(1)By FCM clustering method,the number and clustering center of the dominant structural plane of rock mass are determined,and then the stability state of slope is qualitatively analyzed by using the principle of Chiping projection.The analysis results show that the dangerous rock mass formed by the combination of structural plane makes the slope part unstable.(2)The slope rock mass is divided according to the slope rock mass distribution and geological data,and the slope rock mass quality grade is determined synthetically by RMR?Q system method.Finally,the rock mass mechanical parameters are calculated based on the Hoek-Brown strength criterion.(3)This paper introduces the MCS(Monte Carlo method),which is suitable for rock slope engineering,using MATLAB software as the medium,and uses the limit equilibrium method to calculate the failure probability of slope by inputting various factors affecting slope stability as random variables.The calculation results show that the overall failure probability of slope is much smaller than the target failure value,and 87% of the combinations under 286 combinations of slope height and slope angle do not reach the design failure probability,which indicates that the study of slope needs to be treated in time.(4)Based on the rigid body limit equilibrium method,the stability of the whole slope and the dangerous rock mass are calculated respectively.The results show that the whole slope and its dangerous rock mass under the natural state are relatively stable,but the slope needs to be treated in time if it is under the action of fissure water and earthquake,and the rationality of the calculation results is demonstrated by introducing Flacd3 d numerical simulation.