Accuracy Evaluation Method of Slope Stability in Large Open-pit Mine

Abstract

A precision evaluation method for slope stability in large-scale open-pit mines. According to the principle of matching the spatial position of the structural surface with the location of the slope, and the principle of matching the scale of the structural surface with the scale of the slope, it systematically and comprehensively finds out the key factors controlling the stability of the slope. Structural surface and its combination, the combined step slope and step slope are enlarged to the same geometric scale as the overall slope, and the stability calculation models of the overall slope, combined step slope and step slope are respectively established to improve the combined step slope and The geometric accuracy of step slope stability calculation and modeling can eliminate geometric random errors; for the overall slope, combined step slope and step slope that may be damaged, find the structural surface corresponding to the potential slip surface of the slope and its potential slip surface. In the slip direction, the shear strength of the rock mass discontinuity plane is finely selected respectively. The invention realizes the accurate evaluation of the slope stability of the large-scale open-pit mine by using the graded analysis method of the slope stability and the fine value-valuing technology of the shear strength of the structural surface of the rock mass.

Description

technical field [0001] The invention relates to a method for evaluating the accuracy of slope stability in large-scale open-pit mines, and the invention belongs to the field of engineering technology. Background technique [0002] The stability evaluation of open-pit mine slopes has distinct characteristics and complexity compared with engineering slopes such as highways, railways, buildings, and water conservancy projects. First of all, the slope stability evaluation objects involved in highway, railway, construction, water conservancy and other projects are usually optional, and people can choose to excavate slopes in areas with relatively superior engineering geological conditions by avoiding and changing routes. Mine production can only be excavated and constructed under established engineering geological conditions, and its purpose is to exploit underground mineral resources that exist in a specific geological environment or geological structure, so open-pit mines do no...

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Problems solved by technology

Fourth, engineering slopes such as water conservancy, highways, and railways need to carry out engineering geological surveys, surveys of geometric characteristics of rock mass structural surfaces, and acquisition of physical and mechanical parameters before excavation. These projects are the same as mines that have not been mined. Due to the limitations of survey conditions, multi-solution of geophysical prospecting data, and fragmentation of exploration results, there are many uncertainties in the geometric modeling and parameter values ​​required for slope stability calculations obtained from engineering geological surveys, which directly affect the stability of slopes. The accuracy of stability calculation and the reliability of slope stability evaluation are relatively low. In the design of slope engineering, it is not only acceptable but also necessary to reserve a high safety reserve