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Grading zonal paste backfilling system and method for total tailings of metal minerals

A technology of paste filling and full tailings, which is applied in the direction of fillings, safety devices, mining equipment, etc., can solve the problems of underground debris flow accidents, poor permeability of full tailings non-cemented fillings, etc., to reduce filling costs and equipment technology Mature and reliable, easy to implement the effect of the program

Active Publication Date: 2016-02-10
UNIV OF SCI & TECH BEIJING
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  • Summary
  • Abstract
  • Description
  • Claims
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AI Technical Summary

Problems solved by technology

However, the non-cemented filling body with full tailings has poor permeability and liquefies under the influence of blasting vibration. Once the non-cemented full-tailed paste body in the stope has an empty surface, it may cause downhole debris flow accidents

Method used

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  • Grading zonal paste backfilling system and method for total tailings of metal minerals

Examples

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Effect test

example 1

[0031] The average particle size of the whole tailings of a mine is less than 0.03mm, the -800 mesh is more than 50%, and the +400 mesh is less than 30%, which belongs to ultra-fine full tailings. The ultra-fine full tailings have poor permeability, and the downhole full tailings non-cemented filling body is always in a saturated state, and there is a risk of debris flow. The surrounding rock of the mine is in good condition, but there are a large number of old empty areas in the mine, and the deep ore body needs to be mined by the filling method. The main mining plan is the room-and-pillar method followed by filling mining. The application of graded tailings partitioned paste filling technology makes non-cemented filling possible. The whole tailings are classified with 525 mesh as the classification limit, and the classified underflow (+525 mesh) enters the coarse-grained thickener to thicken into a high-concentration slurry. The first pump body (5) is transported to the surf...

example 2

[0034] The surrounding rock conditions of a certain mine are moderate, and the Platts coefficient f=3~4; Underground ground temperature is high, stope temperature can reach above 35°C. At the same time, the ground stress is large and the ore grade is high. The upward layered filling mining method is adopted for mining, and the graded tailings partition paste filling technology is used for subsequent filling, and the stope layout is alternately mining. After the mine is put into production, the whole tailings of the dressing plant are classified by the hydrocyclone (2), and the classification limit is controlled at 400 mesh (37 μm). The underflow and overflow of the cyclone are respectively thickened into high-concentration tailings slurry through coarse and fine thickeners (3) and (4). The mass concentration of coarse-grained tailings slurry can reach 75-77%, and fine-grained The mass concentration of mortar body is between 67% and 70%. The fine-grained high-concentration ta...

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Abstract

The invention belongs to the field of total tailings paste backfilling and relates to a grading zonal paste backfilling system and method for total tailings of metal minerals. Total tailings of concentrating mills enter a hydrocyclone for grading through a slurry pump, and underflow and overflow of the total tailings are thickened into high-concentration tailings slurry through a thickener. Fine-grained high-concentration tailings slurry is delivered to a backfilling station by a pumping through a pipeline and is backfilled to a step 1 stope after being added with suitable cementing material, while thick-grained high-concentration tailings slurry self-flows or is pumped to a step 2 stope for backfilling, and thus non-cementing backfilling in the step 2 stope is achieved. The high-concentration graded coarse tailings have good water filtration, and a small amount of exudation is discharged out of a backfill through a water filtration facility erected at the stope during non-cementing backfilling. The grading zonal high-concentration backfilling of total tailings can be achieved, and the defect that superfine tailings are poor in dewatering performance can be well overcome.

Description

technical field [0001] The invention belongs to the field of full tailings paste filling, is suitable for the application of low-grade large-scale filling mining mines, and in particular relates to a metal ore full tailings graded and partitioned paste filling system and method. Background technique [0002] With the gradual depletion of high-grade ore deposits and the increasing emphasis on mining environment and safety issues, the advantages of filling mining technology have become increasingly prominent. In order to maintain the sustainable development of the mining industry, one is to continuously improve the high-efficiency mining of large-scale low-grade deposits and new technologies for waste disposal, and the other is to economically treat goafs to alleviate environmental and safety issues. [0003] Low-grade ore deposits must be mined on a large scale to be economically beneficial. The traditional mining method for such deposits is generally to empty the site and th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21F15/06
CPCE21F15/06
Inventor 王洪江吴爱祥杨柳华王贻明王少勇韩斌尹升华
Owner UNIV OF SCI & TECH BEIJING
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