Based On Strength Reduction Theory The Slope Stability Sensitivity Analysis Of Tailings Dam

Tailings dam is one of the construction of the three major facilities. Tailings dam safety issues directly related to the environment and human security. In recent years, tailings dam incidents, especially the large tailings dam accident after another, to the people's lives and property caused serious losses. The tailings dam, the dam slope instability is the main failure modes. A more accurate calculation of tailings dam slope stability and to study the role of tailings dam water, can be a better evaluation of the safety of tailings dam, it will bring reference value to the other tailings dam constructionSlope sensitivity analysis of the problem is an important part of geotechnical engineering, one of the study Slope Engineering in various parameters are different due to the slope to calculate the safety factor varied widely studied in the slope of slope parameters dealing with the sensitivity it is very necessary.Tailings dam in the slope problem is complex, multi-factor issues. Strength reduction is the shear strength of rock mass discount, has been proven its reliability and reasonable. But the current tailings dam dam slope of the multi-factor sensitive issues such as material shear strength parameters, the material stiffness parameters, saturation line, etc., these factors are the determinants of tailings dam slope stability, remains to be further explored. In this text, the basic theory of strength reduction of slope, combined Ningqiang county, Mining Co., Ltd. has built a tailing dam engineering practice engineering, the use of finite element software Abaqus, through the stress and strain on the tailings dam and seepage coupling calculation, conducted on the tailings dam of the dam slope sensitivity analysis, do the following work:(l)The establishment of a model of limited tailings dam, with strength reduction factor of safety of slope calculation and analysis of tailings dam dam slope by calculating the results of the equivalent plastic strain within the vertical stress, horizontal stress, vertical displacement, horizontal displacement, etc. Along with strength reduction coefficient of variation.(2) The strength reduction factor of safety calculated, then the use of geotechnical engineering software Geo-studio of the slope and seep to verify coupling of two modules, and through the safety factor, sliding and other aspects of soil analysis and comparison of both advantages and disadvantages. Engineering analysis can give a reference for the selection of the two.(3) The strength reduction of the slope calculation, because the parameters used more, the importance of each parameter is not the same, and tailings dam is a complex coupled seepage and stress the role of physical parameters inside and outside the role of multiple factors Under the constant changes, effective analysis of various parameters on the slope of the sensitivity of great significance. Slope in the sensitivity analysis process, the use of assumed that other conditions remain unchanged, through the analysis of changes in the object to be cohesion, internal friction angle, elastic modulus, Poisson's ratio sensitivity, while a brief analysis of severe, shear up angle of the slope of the sensitivity and get some very valuable rule.(4) The tailings dam seepage is a complex issue, is also one of the main tailings dam damage factor. Among them, the length of dry beach and the initial tailings dam dam clogging the role of the saturation line is particularly evident in this paper based on the length of mine tailings on dry beaches of different lengths, different degrees of clogging of the initial dam seepage field makes the change, invasive line elevation the impact on the principles of slope stability, the results of the tailings dam unsaturated seepage into the dam slope of the strength reduction and going to calculate each of these factors on the sensitivity of slope stability. It also briefly discusses the role of rainfall for the slope. Through a sensitivity analysis of the above-mentioned factors, For the future tailings designed to provide a meaningful reference value.