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Method for determining parallel development step pitch of inner and outer dumping sites of soft rock opencast coal mine

A technology for open-pit coal mines and determination methods, which is applied in earth-moving drilling, surface mining, underground mining and other directions, can solve the problems of lagging development of external dumping fields, increasing the mining cost of open-pit coal mines, and increasing transportation distances, so as to shorten the time of stripping and transportation. distance, reduce mining costs, and fully occupy the effect of

Active Publication Date: 2021-05-07
LIAONING TECHNICAL UNIVERSITY
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  • Claims
  • Application Information

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Problems solved by technology

In the previous slope shape design process, after the stope reached the boundary, a fixed distance was maintained between the outer dump and the stope. When the inner dump developed far or reached the surface, the outer dump It was only followed up, which led to the lag in the development of the outer dump site, the increase in transportation distance, and a serious increase in the cost of open-pit coal mining

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  • Method for determining parallel development step pitch of inner and outer dumping sites of soft rock opencast coal mine
  • Method for determining parallel development step pitch of inner and outer dumping sites of soft rock opencast coal mine
  • Method for determining parallel development step pitch of inner and outer dumping sites of soft rock opencast coal mine

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Embodiment Construction

[0033] The specific implementation manners of the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. The following examples are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

[0034]In this embodiment, an open-pit coal mining area is taken as an example. The lithology of the mining area is from bottom to top: coal seam, mudstone layer, sandstone layer and Quaternary clay layer. The Quaternary system is distributed in the whole area, the lithology is mainly clay, the strength of the mudstone layer is relatively soft, the main mining coal seam is 3 coal, the average thickness is 30m, 3 coal occurs in weak interlayers, and the mineral composition is mainly illite and montmorillonite , with the characteristics of severe water softening. The surface elevation of the open-pit coal mine is about +80 level, the mining depth is 180m, the design elevatio...

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Abstract

The invention discloses a method for determining a parallel development step pitch of inner and outer dumping sites of soft rock opencast coal mine, and belongs to the technical field of open pit mining, and the method comprises the steps: firstly, determining the safety reserve coefficient of a tall and large composite slope formed by an outer dumping site, a stope and an inner dumping site independently or by combining two or three of the outer dumping site, the stope and the inner dumping site according to the service life of the slope; according to the shape of the side slope, adopting a bishop method and a residual thrust method to calculate and obtain the stability coefficient of the side slope independently, or the stability coefficient of the side slope combining the two or the three of the outer dumping site, the stope and the inner dumping site, comparing the error between the stability coefficient and the safety reserve coefficient, and adjusting the flat plate width of the outer refuse dump, the distance between the top of the stope and the bottom of the outer dumping site and the flat plate width of the innerdumping site; and based on the optimal value of the values, adjusting the forward development step pitch of the outer dumping site. According to the method, the space of the inner and outer dumping sites is quickly and fully occupied, the stripping distance can be shortened, the mining cost of the open pit coal mine is reduced, and the defects of lagging development and large distance of the traditional design outer dumping site are overcome.

Description

technical field [0001] The invention relates to the technical field of open-pit mining, in particular to a method for determining the parallel development step distance of internal and external dumps of soft rock open-pit coal mines. Background technique [0002] Quickly occupying the inner and outer dumps is an important way to achieve safe, efficient and green mining in open-pit coal mines. However, the stability of the tall composite slope composed of inner dumps, stopes, and outer dumps directly threatens the stability of open-pit coal mine workers and employees. Equipment Security. In the previous slope shape design process, after the stope reached the boundary, a fixed distance was maintained between the outer dump and the stope. When the inner dump developed far or reached the surface, the outer dump It was only followed up, which led to the lag in the development of the outer dump site, the increase in transportation distance, and a serious increase in the cost of o...

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Application Information

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IPC IPC(8): G06F30/20E21C41/28G06F119/14
CPCG06F30/20E21C41/28G06F2119/14
Inventor 李广贺王东姜聚宇贺希格图白宇董瑞荣于明宇于翔宇李旭刘杰忠
Owner LIAONING TECHNICAL UNIVERSITY
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