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Shape design method of dip bedded slope of open-pit mine in composite coal seam

A technology for open-pit mines and slopes, which is used in excavation, ground mining, earth-moving drilling and other directions, and can solve problems such as failure to achieve optimal design, affecting the economic benefits of open-pit mines, and threats to safe production in open-pit mines.

Inactive Publication Date: 2015-12-23
LIAONING TECHNICAL UNIVERSITY
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The previous slope engineering design methods did not consider the lithological conditions of strata with different buried depths and the differences in the development form of each weak layer, and could not realize the optimal design of slope slopes with slopes in complex coal seam open-pit mines. Landslides occur along the shallow weak layer when it reaches the bottom of the pit, which poses a great threat to the safe production of open-pit mines, and sometimes causes partial slope design to be conservative, affecting the economic benefits of open-pit mines

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  • Shape design method of dip bedded slope of open-pit mine in composite coal seam
  • Shape design method of dip bedded slope of open-pit mine in composite coal seam
  • Shape design method of dip bedded slope of open-pit mine in composite coal seam

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Embodiment Construction

[0017] The specific implementation manners of the present invention will be described in detail below in conjunction with the accompanying drawings. An open-pit mine has a down-dipping layered slope, and its strata are composed of Cretaceous, Tertiary, and Quaternary strata from bottom to top. Among them, the Cretaceous strata are mainly composed of mudstone and argillaceous sandstone, with a layered structure; the Tertiary strata are dominated by red clay, in a semi-consolidated state; the Quaternary strata are dominated by fine sand and medium sand, with a loose structure. Weak interlayers are relatively developed in the slope, and there are clay weak layers on the Tertiary floor. 中下 The coal roof, 3-1 coal roof, and 3-3 coal roof all have weak mudstone layers, and most of the weak layers are down-dipping. The existence of weak interlayers will greatly weaken the mechanical properties and stability of the rock mass. The physical and mechanical indexes of rock mass in each s...

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Abstract

The invention belongs to the field of open-pit mining and relates to a shape design method of a dip bedded slope of an open-pit mine in a composite coal seam. The method includes: first, acquiring step height and face angle of the dip bedded slope of the open-pit mine in the composite coal seam; second, numbering from top to bottom a plurality of weak beds in the dip bedded slope of the open-pit mine in the composite coal seam, and dividing the slope into a plurality of segments from top to bottom by using the weak beds as boundaries; third, determining a safety reserve coefficient K of the slope; fourth, determining flat plate width of the slope segment by segment from top to bottom, thereby allowing an absolute value of a difference between a slope stability coefficient of each segment and the safety reserve coefficient to be not greater than 0.01 and be satisfactory to checking calculation conditions, and meanwhile using flat plate widths of the corresponding segments as slope shape design results. The slope shape designed by the method is capable of effectively preventing landslide, ensuring maximum recycling of resources and maximizing economic benefit.

Description

technical field [0001] The invention belongs to the field of open-pit mining, and in particular relates to a method for designing the shape of a down-dipping layered side slope in a composite coal seam open-pit mine. Background technique [0002] For open-pit mines with high and large stopes, designing a reasonable slope shape is one of the important factors related to the safe production and economic benefits of open-pit mines. In the previous engineering practice, the two-dimensional limit equilibrium method was widely used to design the slope shape of the open-pit stope. This method usually only considers the stability of the overall slope so that it meets a certain safety reserve factor. [0003] The down-dipping layered slope refers to the layered structure slope on the inclined slope surface of the stratum, and landslides are easy to occur along the down-dipping layer, which is one of the important types in the field of slope engineering research. For a composite coa...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21C41/26E02D17/20
Inventor 王东范军富赵景昌浦凤山王珍赵明明张晓敏
Owner LIAONING TECHNICAL UNIVERSITY
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