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Method for discharging tailing sand from bottom of movably settling open pit

A tailings sand and open-pit technology, applied in ground mining, earth drilling, underground mining, etc., can solve problems such as slope instability, loss, and hidden dangers of landslides

Inactive Publication Date: 2016-08-03
NORTHEASTERN UNIV +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the disadvantages of filling and filling mining methods are large investment and high cost. Under the market conditions of low mineral prices, it may mean the dilemma of losing production.
It is relatively cost-effective to use the segmented caving method without pillars, but the continuous subsidence of the bottom of the pit will cause instability of the slopes on both sides of the original mining pit and hidden dangers of landslides, thus restricting the application of this method

Method used

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  • Method for discharging tailing sand from bottom of movably settling open pit
  • Method for discharging tailing sand from bottom of movably settling open pit
  • Method for discharging tailing sand from bottom of movably settling open pit

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0044] Embodiment 1 A method of discharging tailings sand at the bottom of an open pit for active settlement, comprising the following steps:

[0045] S1. Setting of cap layer 1. For mines that adopt the caving method as the open-pit to underground mining method, at the bottom of the pit in the open-pit mine, the rock cover layer is accumulated, and the settlement center is the lowest point, and it is leveled according to a slope of 13° to 20°, which is used as underground caving mining. The cover layer 1.

[0046] S2. Construction of water filter well 2: With the settlement center as the center, build a water filter well on the upper surface of the cover layer. The water filter well is in the shape of a square with partition walls in the middle. It is the lower solid reinforced concrete wall 3 and the upper non-solid reinforced concrete wall 4; set the length of the water filter well, the height of the lower reinforced concrete wall, the thickness of the glue tailing sand la...

Embodiment 2

[0053] S1. Setting of cap layer 1. For mines that adopt the caving method as the open-pit to underground mining method, at the bottom of the pit in the open-pit mine, the rock cover layer is accumulated, and the settlement center is the lowest point, and it is leveled according to a slope of 13° to 20°, which is used as underground caving mining. The cover layer 1.

[0054] The thickness of the cap rock is determined by the following steps: according to the measured particle size distribution of the cap rock, calculate the critical thickness of the loose layer and the critical thickness of the translation layer when the cap rock is drawn underground; To obtain the correction coefficients of the critical thickness of the loose layer and the critical thickness of the translational layer; collect the rock samples of the target mine, according to the requirements of the similarity simulation test, and make a similar The model conducts ore-drawing tests in the laboratory, and furt...

Embodiment 3

[0074] S1. Setting of cap layer 1. For mines that adopt the caving method as the open-pit to underground mining method, at the bottom of the pit in the open-pit mine, the rock cover layer is accumulated, and the settlement center is the lowest point, and it is leveled according to a slope of 13° to 20°, which is used as underground caving mining. The cover layer 1.

[0075] S2. Construction of filter well 2: centering on the settlement center, build a filter well on the upper surface of the cover layer. The filter well 2 is in the shape of a square with partition walls in the middle, and the four walls and partition walls are poured with reinforced concrete. The reinforced concrete walls of the four walls Divided into the lower solid reinforced concrete wall 3 and the upper non-solid reinforced concrete wall 4; set the length of the water filter well, the height of the lower reinforced concrete wall, the thickness of the glue tailing sand layer and the thickness of the desilti...

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Abstract

The invention discloses a method for discharging tailing sand from the bottom of a movably settling open pit. The method comprises the following steps that S1, a cover layer is arranged; S2, a filter well is constructed; S3, a cemented tailing sand layer is poured; S4, a water filtration pipe network is installed; S5, tailing sand subjected to desliming is discharged; S6, the filter well is filled up; S7, the steps from S3 to S6 are repeated till the open pit is filled up. According to the method for discharging the tailing sand from the bottom of the movably settling open pit, the open pit can be used as a piling bank for transferring in tailings of an underground mine, so that a series of problems concerning mine tailing bank construction are effectively solved, and tailing bank construction and maintenance capital is saved on the premise of guaranteeing underground mining operation safety. An instability disaster of a slope of the open pit is effectively controlled, the underground drainage cost is reduced, good closure of the caving method mining cover layer is ensured, reclamation of the open pit is promoted, the mining cost is greatly reduced, and the environment is protected.

Description

technical field [0001] The invention relates to a method for discharging tailings sand at the bottom of an active subsidence open-pit, and specifically belongs to the technical field of mining. Background technique [0002] For many mines, the construction, maintenance and reclamation of tailings ponds not only need to consider capital investment, but also consider factors such as environment, policies and surrounding residents, which is a major event in mine production and construction. Especially for mines that switch from open-pit to underground mining, part of the funds and energy must be spent to maintain the slope of the open-pit pit, and it is also necessary to do a good job of preventing and draining the accumulated water in the open-pit pit. For mines with large-scale ore bodies, after being transferred to underground production, the filling mining method is adopted to support the goaf with filling bodies to manage ground pressure. Stockpile pressure. However, the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21C41/32
CPCE21C41/32
Inventor 郭献章南世卿王爱东许雁超杨天鸿任凤玉朱万成于庆磊张娟霞何荣兴刘洪磊丁航行魏晨惠马文成
Owner NORTHEASTERN UNIV