Method for developing open pit without main access

A technology for open-pit mines and entry and exit trenches, which is applied in ground mining, earthwork drilling, underground mining, etc., and can solve problems such as potential safety hazards, reduce the amount of mine stripping, and solve the safety problems of entry and exit trenches.

Inactive Publication Date: 2016-08-24
WUHAN DESIGN & RES INST OF CHINA COALTECH & ENG GROUP
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  • Abstract
  • Description
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  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Technical problem: In order to solve the potential safety hazards caused by the installation of entry and exit ditches in small open-pit mines, the present invention provides an open-pit mine development method in which a gentle slope road is set up from the bottom of the pit to the surface. By utilizing the height difference of the surface, there is no need to set up an entry and exit ditch in the pit. Lithology permits, steep side mining can be fully realized

Method used

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  • Method for developing open pit without main access
  • Method for developing open pit without main access
  • Method for developing open pit without main access

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Embodiment Construction

[0011] The present invention will be further described below in conjunction with the accompanying drawings.

[0012] When the first step is mined, a slope of 8‰-10‰ is reserved on the lower side, that is, the open-pit mine transportation road 1, and the remaining sides are pushed to the planned final side position. When the first step is mined and the second step is mined, a slope will continue to be left at the gentle slope road left on the previous level to extend downward, and the remaining sides will also be pushed to the final side position, without considering the width of the transport flat. Only need to leave 3-5m cleaning plate 2. And so on until the mine is mined.

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Abstract

The invention provides a method for developing an open pit without a main access and discloses a method for developing an open pit. The open pit is mainly developed from top to bottom, each level is developed to the final boundary, and an 8-10-permillage gentle slope road led to the ground surface is arranged at the pit bottom all the time. The main access is not required in the pit, the problem about transportation safety of main accesses of small open pits is solved, the mine stripping amount can further be obviously reduced in a mining area with the relatively large terrain height difference, and the method is applicable to the small open pits with small surface boundaries.

Description

technical field [0001] The invention discloses an open-pit mine development method, in particular to an open-pit mine development method in which a gentle slope road from the bottom of the pit to the surface is used to replace the access ditches between the steps in the open-pit mine. It belongs to the research field of open-pit mining development system. Background technique [0002] In order to mine a step and transport the mined rock or resources out of the stope in the process of open-pit coal mining, it is necessary to build at least one transportation channel with a certain slope on the step and its upper steps, which is called a ramp or an access ditch. . The setting of the access ditch will not only increase the side slope angle of the open-pit mine, increase the stripping amount of the mine engineering, but also bring certain safety hazards to the transportation of the open-pit mine. For some small open-pit coal mines, due to the narrow pit bottom, the access ditc...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21C41/28
CPCE21C41/28
Inventor 吴磊吴金现张忠文辛德林张建平于新锋贾成刚王颂华沈金山任建华
Owner WUHAN DESIGN & RES INST OF CHINA COALTECH & ENG GROUP
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