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Method for replacing open pit bottom sludge by alternately extruding waste rocks in different areas

A technology of stone partitioning and silt is applied in the field of using waste rock partitions to alternately extrude and replace silt at the bottom of open pit pits. Strong stability, reducing stockpiling, and beneficial to environmental protection

Pending Publication Date: 2022-02-25
WANBAO MINING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The technical problem to be solved by the present invention is: how to provide a method of alternately extruding and replacing open-pit bottom silt by using waste rock partitions, which is used to solve the difficulty of one-time backfilling of open-pit silt, poor base stability, low strength and low bearing capacity The problem

Method used

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  • Method for replacing open pit bottom sludge by alternately extruding waste rocks in different areas
  • Method for replacing open pit bottom sludge by alternately extruding waste rocks in different areas
  • Method for replacing open pit bottom sludge by alternately extruding waste rocks in different areas

Examples

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Embodiment 1

[0038] An open-pit copper mine is facing a closed pit and backfilling. Due to natural rainfall and drainage from the upper steps, a large amount of silt is deposited at the bottom of the pit, and the average thickness of the mud layer is 4.5m. A method for replacing open-pit bottom silt by alternate extrusion of waste rock partitions, the specific method is as follows:

[0039] First, if figure 1 As shown, the mud 1 at the bottom of the open pit is divided into horizontal blocks, that is, the waste rock 2 is transported to the bottom of the open pit by the transport ramp in the pit using mining trucks, and the waste rock is filled from the middle of the pit bottom plane until the filled waste rock 2 The silt plane is exposed and vibrated and compacted to form a strip-shaped waste rock segment, and the entire silt backfill area is divided into A and B areas. Subsequently, the two districts A and B were subdivided in the same way, and finally the waste rocks were used to squeez...

Embodiment 2

[0046] A method for alternately extruding and replacing open-pit bottom sludge by using waste rock in partitions is mainly suitable for open-pit mines to alternately squeeze and replace open-pit bottom sludge in the manner of "horizontal block and vertical partition" by using mine waste rock.

[0047] The horizontal division is to use waste rocks to divide the mud at the bottom of the open pit into strips in the horizontal direction, divide it into pieces several times in the middle, and then break it into pieces, and then squeeze out the silt and replace it piece by piece.

[0048] The vertical division, that is, divide the silt pit divided into blocks into two parts, the waste rock filling area and the passive extrusion area, every time it is filled in the vertical direction. Among them, the waste rock filling area is bounded by the outer edge of each backfill waste rock, and the remaining part in the silt pit is a passive extrusion area.

[0049] Step 1: Throw and fill a larg...

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Abstract

The invention relates to a method for replacing open pit bottom sludge by alternately extruding waste rocks in different areas, and belongs to the field of mine open-pit mine treatment. The method comprises the steps that open pit bottom silt 1 is transversely divided into blocks, barren rock filling is conducted from the middle of a pit bottom plane till filled barren rock 2 is exposed out of the silt plane, then vibration and compaction are conducted, and the whole silt backfilling area is divided into a partition area A and a partition area B; one side of each partition area is selected to throw and fill the waste rocks 2 until the other side of each partition area is exposed out of the sludge surface 3; a part of gravel is thrown into the dry-spread step sludge surface 3 to form a dry-spread step sludge and gravel composite body 4, and then waste rock 2 is thrown and filled in the opposite direction of the other side of the division area to achieve silt extrusion replacement; the step 2 and the step 3 are repeated, and the waste rocks are alternately thrown and filled in the vertical direction to achieve extrusion and replacement of the sludge; the method has the beneficial effects that the open pit bottom sludge backfill area is divided into blocks in the horizontal direction, and the blocks are squeezed and replaced one by one, so that the problem of high difficulty of one-time backfill engineering is effectively solved.

Description

technical field [0001] The invention belongs to the field of mine open-pit management, and in particular relates to a method for replacing open-pit bottom sludge by alternate extrusion of waste rocks in sections. Background technique [0002] In open-pit mines, in the rainy season or when there is fissure water around the mine pit, if the plugging or drainage is not timely, a large amount of silt will easily be generated at the bottom of the open pit. The open-pit bottom silt with accumulated water all the year round is mostly in the shape of saturated flow plastic, with high water content, low permeability coefficient and undrained shear strength. Before backfilling the open pit, the sludge at the bottom of the pit must be treated, otherwise it is easy to cause safety accidents such as base instability and earthquake subsidence, which in turn will cause loss of personnel and property. In recent years, more and more mines are facing closed pits or open-pit to underground mi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E02D3/08
CPCE02D3/08
Inventor 李涛刘敬智沈汉梁昌鸿李路
Owner WANBAO MINING