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Full-tailing mine underground filling method

An underground and full tailings technology, which is applied in the field of full tailings underground filling, can solve the problems of high tailings loss, poor filling quality, and slow condensation of full tailings.

Pending Publication Date: 2021-07-09
新疆紫金锌业有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a full tailings underground filling method, which solves the problems in the prior art that the tailings need to be graded, high tailings loss, slow or even non-condensed full tailings, poor filling quality, Disadvantages such as high filling cost and high lime-sand ratio

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0055] Example 1: Selection of filling slurry retarding inhibitor

[0056] The existence of smithsonite is the key factor leading to the retardation of filling slurry, so it is necessary to investigate which inhibitors can eliminate the retardation phenomenon caused by smithsonite through the reaction process. Add cement (P.O 42.5), retarding inhibitor and water to the whole tailings to prepare filling slurry, then cast the prepared filling slurry and demould, and record the demoulding time. The test results are shown in Table 1 .

[0057] Sodium hydrosulfide and trisodium phosphate are selected as retarding inhibitors, which can form precipitates with zinc. In the experiment, NaHS, Na 3 PO 4 The dosage is 0.25% of the tailings weight. In addition, zinc ions consume part of calcium ions during cement hydration, resulting in insufficient calcium ions in the slurry. The test intends to investigate the effect of alkalinity on shortening the demoulding time by adding a small ...

Embodiment 2

[0061] Embodiment 2: The influence of sulfide additive on demoulding time of test piece

[0062] Investigate the effects of retarder inhibitor agent types, agent dosage, and different lime-sand ratios on the demoulding time of the test block. specific:

[0063] (1) Method: Add cement (P.O 42.5), different amounts of sodium hydrosulfide and water to the whole tailing sand to prepare filling slurry (lime-sand ratio 1:4, filling concentration 72%), and then mix the prepared The filling slurry was poured and demoulded, and the demoulding time was recorded. The test results are shown in Table 2.

[0064] Table 2 Effect of NaHS dosage on demoulding time

[0065]

[0066] It can be seen from Table 2 that with the increase of the dosage of sodium hydrosulfide, the demoulding time of the slurry is continuously shortened, from 120h with zero addition of sodium hydrosulfide to within 8h. From the perspective of economy and environmental protection, when the amount of sodium hydrosu...

Embodiment 3

[0075] Embodiment 3: Filling material strength ratio

[0076] The raw material used in the test is the whole tailings of Xinjiang Zijin Zinc Industry, the cement is Tianshan brand ordinary Portland cement (P.O42.5), and the additive is sodium hydrosulfide solution (content 21.14%, provided by Zijinshan Gold and Copper Mine). According to the results of the slump test, it is determined that the filling ratio test of the whole tailings is 6 groups of lime-sand ratios: 1:4, 1:6, 1:8, 1:10, 1:15, and 1:20. There are 4 groups of 68%, 70%, 72%, and 74%. Each group is tested for compressive strength at four ages of 7d, 14d, 28d, and 60d. Two test blocks are poured for each age, and each group is supplemented with 2 A total of 240 test blocks were used to test the bulk density of each age.

[0077] The test process is as follows: After weighing the tailings, cement, sodium hydrosulfide and water according to the proportion, firstly mix the tailings and cement evenly, then add sodium ...

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Abstract

The invention relates to a full-tailing mine underground filling method. The full-tailing mine underground filling method comprises the steps that cement, sulfide and water are added into full tailings, high-strength filling slurry, medium-strength filling slurry and non-cemented filling slurry are prepared respectively, and the bottom of a stope, the lower portions of all layers of the stope and the upper portions of all layers of the stope are filled respectively according to a pilaster type upward layered mining method; the sulfide is sodium hydrosulfide or sodium sulfide. The full-tailing mine underground filling method is simple and low in cost, and the defects that in the prior art, tailings need to be subjected to grading treatment, the loss of the tailings is high, the full tailings are low in condensation speed and even not condensed, the filling quality is poor, the filling cost is high, and the cement-sand ratio is high are overcome.

Description

technical field [0001] The invention specifically relates to an underground filling method for full tailings. Background technique [0002] Since the 1850s, the development of filling technology and technology in my country has experienced the development process of waste dry rock filling, graded tailings hydraulic sand filling, gravel hydraulic filling, concrete cemented filling, tailings and fine sand cemented filling. . Traditional tailings filling mostly uses graded desilted sand as the main material of cemented filling, and the utilization rate of tailings is generally only about 50%. At present, some scientific research teams have carried out experimental research on the possibility of non-desilting tailings as filling materials, and achieved some results, and applied them in some mine tests. After the whole tailings were dehydrated underground, the mortar concentration reached more than 70%. . [0003] At present, most of the tailings filling methods use graded desi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/04
CPCC04B28/04C04B2111/00724C04B2201/50C04B22/14C04B18/12
Inventor 林毅斌沈卫卫朱宏斌李守业林天发徐维州金凤英
Owner 新疆紫金锌业有限公司
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