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Water storage method at the bottom of open pit or subsidence area in mine reclamation

A technology for open-pit pits and mines, which is applied in the fields of land preparation methods, botanical equipment and methods, and ground mining. It can solve the problems of easy evaporation of square pond water storage, inability to guarantee reclamation water, and no guarantee of water sources, etc.

Active Publication Date: 2018-12-04
建平盛德日新矿业有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] There is no guarantee of water source for mine reclamation in arid and semi-arid mountainous areas, and the water stored in the square pond is easy to evaporate, so the water for reclamation cannot be guaranteed

Method used

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  • Water storage method at the bottom of open pit or subsidence area in mine reclamation
  • Water storage method at the bottom of open pit or subsidence area in mine reclamation
  • Water storage method at the bottom of open pit or subsidence area in mine reclamation

Examples

Experimental program
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Effect test

Embodiment 1

[0022] 1. Select an open pit with a flat surface in an arid or semi-arid area (see figure 1 ); Utilize the non-cracked groove shape at the bottom of the open pit to backfill the waste ore (see Figure 5 ), the backfilled waste ore will fill the closed pit to a height of 40-60cm from the adjacent surface, which is the thickness of the reserved structural surface layer; choose waste ore with a particle size range of 20-50cm to fill the open pit At the bottom of the pit, there is a structure-like underground aquifer through the gap of the waste ore.

[0023] 2. see image 3 , 4 Select the "well position" before filling the waste rock. While filling the waste ore, pre-bury multi-section cast iron well pipes, from the bottom of the pipe to the bottom of the pit. The outer diameter of the cast iron well pipe is 440mm. The pressure is used as the reference, and the anti-oxidation layer 2 is applied; the multi-section cast iron well pipes from the bottom of the pit to the surface a...

Embodiment 2

[0028] Select an open pit on a slope in an arid or semi-arid region (see figure 2 ).

[0029] Steps 1, 2, and 3 are as above, and Step 4: After the pit is filled with waste rock, a clay fixed layer 9 is laid on the upper layer with a thickness of 10-20 cm, compacted and fixed, and an iron tailings sand layer is laid with a thickness of 5-10 cm. The uppermost layer is guest soil layer 7, with a thickness of 25-30cm, made of high-quality cultivated land. At the same time, terraces are built to prevent water and soil erosion, and play the role of water storage, soil conservation and production increase. Irrigation facilities adopt drip irrigation or sprinkler irrigation.

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Abstract

The invention discloses an opening mining pit or subsidence area bottom water storing and lifting method for mine site rehabilitation. The method is characterized in that the mining pit bottom crack-free groove-shaped state and backfilled waste ore gaps are used for forming a similar underground aquifer; a certain number of opening mining pits are reserved and not filled to serve as temporary storage pits for collecting surface water, surface runoff water in mining pit peripheral collecting areas is collected into the temporary storage pits through the terrain gradient or interception ditches, free settling and filtering, and then the water is laterally collected to the mining pit bottoms through the waste ore gaps, namely filtering layers; and meanwhile underground water on the periphery of the middle-lower portions of the opening mining pits is laterally collected to the mining pit bottoms, an underground water storage reservoir after mining pit filling is formed, and water is lifted through a tube well reserved during filling. The method has the technical advantages that unconcealed water storage in mine site rehabilitation is changed into concealed water storage, stored water evaporation loss is reduced or avoided, the occupied space and potential safety hazards for constructing a square surface water storage pool are avoided, and the effects of retaining water sources and saving lands are achieved.

Description

technical field [0001] The invention belongs to a novel water source storage method in land reclamation of open pits or mining subsidence, especially for arid and semi-arid areas with large evaporation and natural precipitation that cannot meet the water consumption of cultivated crops after mine reclamation. Background technique [0002] Mine reclamation refers to the planned remediation of land damaged by excavation, subsidence, and occupation during mine construction and production, so as to restore it to a usable state. In the process of mining, destroying the local ecological balance is the main source of mine environmental problems. Mine reclamation is the main way to solve the mine environment and mine economic development at this stage. At present, land reclamation in mining areas can be divided into agricultural reclamation, forestry reclamation, fishery reclamation, nature protection reclamation, water resource reclamation and industrial reclamation according to it...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E21C41/32A01B79/00A01G25/00
CPCA01B79/00A01G25/00E21C41/32Y02P60/20
Inventor 边振兴毕建平魏忠义刘永海孟卓王井学于淼毕英杰曹庆寰
Owner 建平盛德日新矿业有限公司
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