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A method for discharging tailings paste at the bottom of active settlement open pit

A technology of open pit and paste, applied in mining equipment, earth square drilling, mining equipment, etc., can solve the problems of low efficiency, high cost, limited promotion and application, etc., to protect the environment, control instability disasters, and save construction The effect of funding with maintenance

Active Publication Date: 2019-05-28
东北大学秦皇岛分校 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Tailings filling mining technology partially solves the above problems, but its high cost and relatively low efficiency limit its promotion and application
For mines that are converted from open-pit to underground mining, surface pits are allowed to collapse. The use of sub-column caving without pillars can improve efficiency and reduce mining costs, but it cannot avoid the construction and maintenance of tailings ponds. The deeper and deeper open-air slopes still need to be reinforced

Method used

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  • A method for discharging tailings paste at the bottom of active settlement open pit
  • A method for discharging tailings paste at the bottom of active settlement open pit
  • A method for discharging tailings paste at the bottom of active settlement open pit

Examples

Experimental program
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Effect test

Embodiment 1

[0043] A method for discharging tailings paste at the bottom of an active settlement open pit, comprising the following steps:

[0044] S1. Evaluation of tailings sand: analyze the tailings sand of the target mine according to the chemical composition and particle size distribution, and screen for backup;

[0045] S2. Detection of tailings paste samples: use tailings sand in step S1 to prepare tailings paste samples, first observe the characteristics and quantities of hydrates formed in different curing ages, and determine the lime-sand ratio and tailings paste Preliminary range of water content, followed by fluidity test, viscosity test, settling test at settling test, segregation test and bleeding test, strength test after settling and hydration test to determine lime-sand ratio and tailings paste final range of moisture content;

[0046] S3. The setting of the open-pit bottom for active settlement: divide the open-pit bottom into blocks; then measure and calculate the maxi...

Embodiment 2

[0049] A method for discharging tailings paste at the bottom of an active settlement open pit, comprising the following steps:

[0050] S1. Evaluation of tailings sand: analyze the tailings sand of the target mine according to the chemical composition and particle size distribution, and screen for backup; including the following steps:

[0051] S1.1. Analyze the chemical composition of the tailings sand. When the silica mass fraction in the tailings sand is ≥ 50%, it is directly used to prepare the tailings paste;

[0052] S1.2. Carry out particle size distribution analysis on the tailings sand. In the tailings sand, when the mass fraction of fine-grained matter less than 20 μm is in the range of 15% to 35%, it can be directly used to prepare tailings paste; when it is less than 20 μm When the mass fraction of fine-grained matter is 35%, add flocculant when preparing tailings paste.

[0053] S2. Detection of tailings paste samples: use tailings sand in step S1 to prepare tail...

Embodiment 3

[0063] A method for discharging tailings paste at the bottom of an active settlement open pit, comprising the following steps:

[0064] S1. Evaluation of tailings sand: analyze the tailings sand of the target mine according to the chemical composition and particle size distribution, and screen for backup; specifically include the following steps:

[0065] S1.1. Analyze the chemical composition of the tailings sand. When the silica mass fraction in the tailings sand is ≥ 50%, it is directly used to prepare the tailings paste;

[0066] S1.2. Carry out particle size distribution analysis on the tailings sand. In the tailings sand, when the mass fraction of fine-grained matter less than 20 μm is in the range of 15% to 35%, it can be directly used to prepare tailings paste; when it is less than 20 μm When the mass fraction of fine-grained matter is 35%, add flocculant when preparing tailings paste.

[0067] S2. Detection of tailings paste samples: use tailings sand in step S1 to p...

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Abstract

The invention discloses a method for discharging tailings paste at the bottom of an active settlement open pit, comprising the following steps: S1, evaluation of tailings sand; S2, detection of tailings paste samples; S3, active settlement open pit Bottom setting; S4, discharge of tailings paste. The invention provides a method for discharging tailings paste at the bottom of an active subsidence open-pit, which can use the open-pit as a tailings storage for underground mining, which not only effectively solves the problem of mine tailings construction. On the premise of ensuring the safety of underground mining operations, it saves the funds for the construction and maintenance of tailings ponds. Moreover, it can effectively control the instability disaster of the slope of the open pit, save the cost of underground drainage, solve the problem that the tailings cannot be discharged on the cover layer of the caving mining method, and is conducive to the reclamation of the open pit, which greatly saves mining. cost and protect the environment.

Description

technical field [0001] The invention relates to a method for discharging tailings paste at the bottom of an active subsidence open pit, and specifically belongs to the technical field of mining. Background technique [0002] The concept of green waste-free mining and environmentally friendly mines is one of the development directions of mining technology. The main solid waste in mines is the tailings discharged from the ore dressing plant. Utilizing the tailings as a resource saves the construction and maintenance of the tailings pond While reducing the cost, turning waste into treasure and protecting the environment have become a key issue that the modern Chinese mining industry must solve. Tailings filling mining technology partially solves the above problems, but its high cost and relatively low efficiency limit its promotion and application. For mines that are converted from open-pit to underground mining, surface pits are allowed to collapse. The use of sub-column cavi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E21F17/00G01N33/24
CPCE21F17/00G01N33/24
Inventor 郭献章南楠杨天鸿张娟霞王述红刘洪磊何荣兴丁航行魏晨惠马文成徐高鹏杨惠雅周友智张明
Owner 东北大学秦皇岛分校