Value method for design safety coefficient of large surface mine slopes

Abstract

The invention discloses a value method for design safety coefficient of large surface mine slopes, which includes a surface mine slope to be analyzed is selected as a research object; according to a calculation model and shear strength parameters of a potential slip surface, a slope stability coefficient k 0 under a working condition is calculated; a random error Delta r is calculated according to a slope stability coefficient k i obtained by a traditional calculation method and the slope stability coefficient k 0 determined by fine values of structural planes of rock masses based on a classification analysis of the slope stability; differences between the slope stability state and the slope stability coefficient determined by fine value of the structural plane of the rock masses based onthe classification analysis of the slope stability are compared to determine a systematic error of the slope stability coefficient Delta s; the sum of absolute values of the systematic error of the slope stability coefficient Delta s and the random error Delta r is calculated and a calculation error of the slope stability coefficient Delta is determined. The value method for the design safety factors of the large surface mine slopes effectively and quantitatively determines the design safety coefficient of the large surface mine slopes.

Description

technical field [0001] The present invention relates to a large-scale open-pit mine slope safety coefficient value method, in particular, on the basis of analyzing the stability coefficient accuracy and stability coefficient error, the present invention establishes the correlation between the stability coefficient error and the slope design safety coefficient, which is the The uncertainty problem of slope design safety factor provides a deterministic solution, which significantly improves the reliability of the value of large-scale open-pit mine slope design safety factor. The invention belongs to the field of engineering technology. Background technique [0002] Slope stability analysis is an important decision-making basis to determine whether the slope is in a stable state, whether it needs to be reinforced and treated, and to prevent it from being damaged. The slope stability coefficient analysis method is the basic method to evaluate the slope stability. Slope stabilit...

AI Technical Summary

Problems solved by technology

Although the value of this safety factor has been written into the specification, they are proposed on the basis of summarizing experience and have played a certain role in solving practical engineering problems. However, human factors have a great influence on the value of specific projects. , and for different engineering geological conditions and different degrees of understanding of engineering geological conditions, there is no good distinction, and it is difficult for decision makers to feel "sure".

When the accuracy of slope stability evaluation results is difficult to accurately estimate, the safety and reliability are often guaranteed by artificially increasing the design safety factor and increasing engineering investment. waste is amazing

Starting from the economics of open-pit mining, improperly increasing the design safety factor will obviously increase the funds for mineral development, reduce the profits of mining companies, and bring greater resource losses to the country. The purpose of the level of comprehensive utilization runs counter to the goal, but blindly pursuing economy and reducing the design safety factor may lead to slope instability and damage, resulting in greater economic losses and casualties, and the result is counterproductive.

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