End slope and side slope stability analysis method for open pit coal mine steep slope mining

An open-pit coal mine and analysis method technology, which is applied in the field of end-side slope stability analysis of steep-cut mining in open-pit coal mines, can solve the problems of not being able to fully and accurately reflect the three-dimensional characteristics of the slope and the accurate stability state, and reduce the The effect of producing stripping ratio, fully recovering coal resources and improving economic benefits

Pending Publication Date: 2021-09-21
LIAONING TECHNICAL UNIVERSITY
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Problems solved by technology

[0003] The design of slope form in open-pit coal mines usually adopts the static limit equilibrium theory for stability calculation, and the complex three-dimensional slope that is double supported by the stope working

Method used

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  • End slope and side slope stability analysis method for open pit coal mine steep slope mining
  • End slope and side slope stability analysis method for open pit coal mine steep slope mining
  • End slope and side slope stability analysis method for open pit coal mine steep slope mining

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Embodiment

[0030] Example: Antaibao Open Pit Mine is located in the north of Ningwu Coalfield, most of the surface is covered by Cenozoic strata. The main mineable coal seams in this area are 4, 9, and 11 coal seams. The 4th coal seam is located at the top of the Taiyuan formation. m, with an average of 9.41m. The mine is a near-horizontal coal seam open-pit mine, adopting the zonal mining and internal drainage side mining procedure, and the internal dump and stope follow the development, and the exposed area and existence time of the side slope are relatively small. For slope engineering geological conditions like Antaibao Open Pit Mine Area, according to the theory of aging slopes, there is some room for adjustment in the final slope angle of the end side.

[0031] According to the engineering geological characteristics of the side slope of Antaibao Open-pit Mine, the Morgenstern-Price method is chosen to analyze and evaluate the stability of the side slope of Antaibao Open-pit Mine. ...

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Abstract

The invention discloses an end slope stability analysis method for open pit coal mine steep slope mining. The method comprises the steps of analyzing stability influence factors and a potential landslide mode of an end slope of an open pit coal mine; determining an end slope safety reserve coefficient; determining the final form of the steep slope mining end slope side slope; establishing a three-dimensional numerical model to analyze change characteristics of an end slope deformation failure rule and a slope stability coefficient under different tracking distances; and determining an inner row tracking distance, and implementing steep slope mining. According to the end slope stability analysis method for open pit coal mine steep slope mining, the slope where steep slope mining cannot be conducted is judged through a two-dimensional slope analysis method, new mining possibility is achieved, benefit maximization after the overall slope angle design is achieved, coal resources can be fully recycled, the production stripping ratio is reduced, and economic benefits are improved.

Description

technical field [0001] The invention belongs to the technical field of open-pit mining, and in particular relates to a side slope stability analysis method for steep-side mining in open-pit coal mines. Background technique [0002] Most of the open-pit mines in our country will be affected by the stripping ratio in the production process, resulting in the failure to maximize the annual output or economic benefits. When designing the slope angle in open-pit coal mines, most of them do not consider the time effect of the periodic formation and disappearance of side slopes in the mining area during the process of excavation and internal drainage, and regard time-sensitive slopes as permanent services. It will also lead to the overall slope angle of the design being too conservative. Furthermore, there are too many security flats and transportation flats arranged on side slopes, and the width of the flats usually exceeds the design requirements, which will directly lead to a sm...

Claims

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Application Information

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IPC IPC(8): G06F30/20G06Q10/06G06Q50/02G06F111/10G06F119/14
CPCG06F30/20G06Q10/06393G06Q50/02G06F2111/10G06F2119/14
Inventor 李红毅白润才
Owner LIAONING TECHNICAL UNIVERSITY
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