Method for analyzing bench slope stability under blasting effect

A technology of step slope and stability, applied in special data processing applications, instruments, electrical digital data processing, etc., to achieve accurate calculation results and reasonable evaluation indicators

A technology of step slope and stability, applied in special data processing applications, instruments, electrical digital data processing, etc., to achieve accurate calculation results and reasonable evaluation indicators

CN105224742AActive Publication Date: 2016-01-06ANSTEEL GRP MINING CO LTD
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  • Method for analyzing bench slope stability under blasting effect
  • Method for analyzing bench slope stability under blasting effect

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Embodiment Construction

[0041] An embodiment of the present invention will be further described below in conjunction with the accompanying drawings.

[0042] In the embodiment of the present invention, the stability analysis is carried out to the step slope of an open-pit iron mine, and the specific method steps are as follows figure 1 shown, including the following steps:

[0043] Step 1, carry out data collection to the on-site step slope, and sample the platform of the on-site step slope;

[0044]The data collection includes the geometric form of the step slope, stratum characteristics, structural surface distribution, groundwater conditions and blasting parameters; the geometric form includes: step slope height, step slope angle, safety platform width and step Quantity; the stratum characteristics include the number of strata, the rock type of the stratum, the inclination and dip angle of each stratum; the distribution of structural planes includes the number of structural planes, the occurrence...

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Abstract

The invention provides a method for analyzing bench slope stability under blasting effect, and belongs to the technical field of open-pit mining. Compared with a conventional method, the method combines numerical simulation with vibration monitoring, and uses vibration information of a slop body to correct material parameters of the slop body, and provides more accurate input parameters for numerical simulation. A numerical simulation method coupling finite elements with discrete elements is used to perform mechanical analysis, and progressive failure process of the slope under blast load effect is completely depicted. A calculation result is more accurate. Rupture degree is used to evaluate slope stability, and internal damage and rupture conditions of a slope body can be directly reflected, and an evaluation index is more reasonable.

Description

technical field [0001] The invention belongs to the technical field of open-pit mining, and in particular relates to a method for analyzing the stability of a step slope under the action of blasting. Background technique [0002] Under the repeated action of blasting vibration, the stepped slope of the open-pit mine will deteriorate the material properties, which will lead to the instability and destruction of the slope. At present, the methods for analyzing slope stability mainly include limit equilibrium method and numerical simulation method. [0003] Based on the rigid-plastic assumption and the assumption of consistent motion, the limit equilibrium method uses a single degree of freedom to characterize the overall stability state of the landslide mass, so it cannot describe the impact of the non-uniform motion of the slope on its stability. In addition, the limit equilibrium method is a static stability analysis method, and the dynamic problems can only be analyzed aft...

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Application Information

Patent Timeline
06 Jan 2016
Publication
CN105224742A
IPC
G06F17/50
Inventors
潘鹏飞; 孙厚广