Method for optimizing slope of open-pit mine

A technology for slopes and mines, applied in the field of three-dimensional limit equilibrium analysis based on GIS, can solve the problems of difficult analysis management and data update, and achieve the effect of reducing the amount of rock stripping and reducing the production stripping ratio.

Inactive Publication Date: 2005-03-23
UNIV OF SCI & TECH BEIJING
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Problems solved by technology

In addition, the stability of slopes depends on factors such as terrain, stratum, geomechanics parameters, and groundwater in a complex spatial dis...

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  • Method for optimizing slope of open-pit mine
  • Method for optimizing slope of open-pit mine
  • Method for optimizing slope of open-pit mine

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[0026] The maximum depression mining depth of an open-pit iron mine is 430m (-350m level), and the maximum vertical height of the final slope is 660m. On the one hand, increasing the slope angle is one of the important means to fully recover resources, reduce production costs, and increase mining benefits. For large-scale open-pit mines, increasing the slope angle by 1° can reduce the amount of stripping by tens of millions of tons, and the economic benefits are very significant. On the other hand, with the heightening and steepening of the slope, the difficulty of mining and the probability of stope damage are increasing, and the safety of mining is getting worse. In order to solve this pair of contradictions, it is necessary to carry out optimization research on slope design, and under the premise of ensuring safety, increase the slope angle as much as possible and reduce the amount of stripping.

[0027] The slope optimization of this mine adopts the three-dimensional limi...

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Abstract

The invention relates to strip mine's slope beside hill optimization. It belongs to strip mine's slope beside hill engineering technology field. Its steps are: build GIS data module; build side slope stabilization three dimension limit balance analysis module based GIS; realize arithmetic of three dimension module based on GIS and side slope optimization. Adopting GIS space analysis function, engineering geology, geography condition and hydrogeology information relative to side slope stabilization is presented into data structure, database design, space data analysis method etc. in GIS data model. Information relative to side slope of stratum, structure face, water table etc are presented through GIS data layer. All input data are converted in form of grid. The data are ground height, vergence direction, tile angle, ground water, ground floor, slip surface and physical mechanics parameters of space distribution. Each three dimension grid column unit can descript a kind of geography information relative to stabilization analysis of ground, stratum, slip surface etc. Adopting the invention, side slope can be optimized to reduce amount of ripping rock and production shell-exploit rate.

Description

technical field [0001] The invention belongs to the technical field of open-pit mine slope engineering, in particular to a GIS-based three-dimensional limit equilibrium analysis method. Background technique [0002] For large open-pit mines, increasing the slope angle is an important means to fully recover resources, reduce the amount of stripping, and reduce production costs. At present, the analysis and optimization of slope stability widely adopts the two-dimensional limit equilibrium analysis method, ignoring the three-dimensional effect of the slope, and the result is generally conservative and increases the project cost. Studies have shown that under the same conditions, the three-dimensional safety factor of the slope is 10-30% larger than the two-dimensional safety factor. In addition, the stability of slopes depends on factors such as terrain, stratum, geomechanics parameters, and groundwater in a complex spatial distribution state, but these information are diffic...

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Application Information

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IPC IPC(8): E21C41/26G06F19/00
Inventor 谢谟文蔡美峰谭文辉
Owner UNIV OF SCI & TECH BEIJING
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