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Strip mine steep-wall mining method

A mining method and open-pit mining technology, which is applied in ground mining, earth square drilling, underground mining, etc., can solve the problems of long production and production period, long rock stripping time, and high investment risk, so as to prevent missing ore and reduce stripping. The effect of rock volume and early production

Inactive Publication Date: 2016-12-14
中冶北方(大连)工程技术有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0002] Open-pit mining is a process of stripping the rocks on the ore body to obtain the required minerals. The current mining method is usually to mine from top to bottom from the surface status line. When the ore body is deep and covered in the ore When the thickness of the rock layer on the upper part of the body is large, a large amount of rock needs to be stripped to see the ore. Therefore, the amount of rock stripping in the early stage is huge, the rock stripping time in the early stage is long, and the mining time is late, resulting in excessive initial investment and high investment risk. The problem of long lead time

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Embodiment 1

[0023] In order to solve the problems in the prior art that the amount of rock stripping in the early stage is huge, the rock stripping time in the early stage is long, and the mining time is late, the embodiment of the present invention provides a steep side mining method in an open-pit mine. The method includes:

[0024] In the area between the ground surface status line and the open-pit end boundary line, N inclined mining zones are divided in turn, which are respectively the first mining zone, the second mining zone, ... the Nth mining zone, wherein, N≥2 and N is an integer, and the 1st mining zone is the mining zone where the working side is the farthest from the open-air end boundary in the N mining belts, and the N mining zone is the mining zone where the working side is the closest to the open-air ending boundary in the N mining belts;

[0025] In the embodiment of the present invention, the number of mining zones can be reasonably designed according to actual mining co...

Embodiment 2

[0038] The embodiment of the present invention is an example of mining an open-pit mine using the mining method described in the first embodiment.

[0039] Such as figure 1 As shown, the open-pit mine is a gently inclined open-pit mine, the occurrence of ore body 1 is relatively deep, and the rock layer on the upper part of ore body 1 is relatively thick. According to the mining conditions of the open-pit mine, four inclined mining zones are designed, 2 is Surface boundary line, 3 is the open-air end boundary line, and four mining zones are divided between the surface boundary line 2 and the open-air end boundary line 3, such as figure 2 As shown, 4 is the first mining zone.

[0040] Rock stripping is carried out from top to bottom to the first mining zone 4 within the bandwidth of the first mining zone 4, figure 2 5 is the state map of open-pit mining in the first year, and 5 is the actual mining boundary line;

[0041] Such as image 3As shown, it is the state map of t...

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Abstract

The invention discloses a strip mine steep-wall mining method. The method is characterized by comprising the steps of dividing the area between an earth surface status line and an exposed ending boundary line into N oblique excavation zones in sequence, namely the first excavation zone, the second excavation zone,...and the N excavation zone, wherein among all the N excavation zones, the first excavation zone is farthest from the exposed ending boundary line, and the N excavation zone is nearest to the exposed ending boundary line; conducting rock stripping on the first excavation zone from top to bottom; conducting rock stripping on the second excavation zone from top to bottom when ore is extracted from the first excavation zone; in this way, conducting rock stripping on at least two excavation zones at the same time during propelling of working pit edge after ore is extracted from the first excavation zone till rock stripping of the N excavation zone is finished. By means of the method, earlier-stage rock stripping volume can be reduced, uninterrupted production of a mine can be guaranteed, and productivity of ore can be guaranteed.

Description

technical field [0001] The invention relates to the technical field of open-pit mining, in particular to a method for mining steep sides of an open-pit mine. Background technique [0002] Open-pit mining is a process of stripping the rocks on the ore body to obtain the required minerals. The current mining method is usually to mine from top to bottom from the surface status line. When the ore body is deep and covered in the ore When the thickness of the rock layer on the upper part of the body is large, a large amount of rock needs to be stripped to see the ore. Therefore, the amount of rock stripping in the early stage is huge, the rock stripping time in the early stage is long, and the mining time is late, resulting in excessive initial investment and high investment risk. The problem of long lead times. Contents of the invention [0003] In view of the problems in the prior art that the amount of rock stripping in the early stage is huge, the rock stripping time in the...

Claims

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Application Information

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IPC IPC(8): E21C41/26
CPCE21C41/26
Inventor 韩波文振明
Owner 中冶北方(大连)工程技术有限公司
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