| The stability analysis of slope with weak layer in open pit mining is an important research content in the field of open pit mining,and also one of the most urgent problems in slope engineering research.At present,there are many calculation methods that can be applied.With the complexity and diversity of practical problems encountered in slope engineering,the two-dimensional limit equilibrium method will lead to conservative calculation results,sometimes unable to meet the needs of complex engineering.Therefore,it is necessary to carry out the research on three-dimensional stability analysis of slopes with weak layers.In order to solve the problem of three-dimensional stability analysis of slopes with weak layers in open-pit coal mines,based on the standard ellipsoid,the space geometry of the slope is changed,and an ellipsoidal dangerous sliding surface controlled by 6 parameters such as_is generated by interpolation with the slope,and the ellipsoidal sliding surface and the weak layer are combined and interpolated to form a three-dimensional dangerous sliding surface of slopes with weak layers;Based on the residual thrust method and genetic algorithm,the 3D stability calculation method and the most dangerous sliding surface search method of slopes with weak layers are studied;With Visual Studio 2012 as the programming tool,based on Object ARX library and Auto CAD as the graphics platform,develop a 3D stability calculation system for slopes with weak layers;The project is applied to the slope with weak layer in the northeast side of Baiyinhua No.1 opencast coal mine.The research results show that the dangerous sliding surface of the slope with weak layer formed by the combination of the ellipsoid controlled by six parameters such as semi-major axis_and the structural plane of weak layer is more consistent with the actual landslide shape of the slope with weak layer;The 3D stability calculation system of the slope with weak layer designed and developed has realized the calculation of the stability coefficient of the classic calculation example and the slope with weak layer in the northeast side of Baiyinhua No.1 Mine,and verified the feasibility of the method and system. |
