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Filling and consolidating powder for mining purposes and use thereof

A technology of consolidation powder and mining, which is applied in the direction of filling, mining equipment, earthwork drilling and mining, etc. It can solve the problems of difficulty in underground filling, poor fluidity of mixture, and inability of cement to achieve good roof control effect and easy formation , Surrounding rock support effect is good

Inactive Publication Date: 2013-01-23
ZIBO GEOLOGICAL MINE TECH SERVICE CENT
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, when cement is used as the cementing material, there are the following problems: the fluidity of the mixture during filling is poor, the early strength is low, and the cost is high. particles, the cement cannot play its due role
[0004] Chinese Patent Publication No. CN1500762A (Application No. 02135821.4) discloses a single-slurry cemented filling material and its application method. It is made of rapid-hardening sulphoaluminate clinker, phosphogypsum, quicklime, bentonite and slag according to the ratio of mixing and grinding. The rapid-hardening sulfoaluminate clinker accounts for 15-25%. The cemented filling material produced by this method contains more rapid-hardening sulfoaluminate clinker. Although the early strength is high, due to the rapid-hardening sulfur The price of aluminate clinker is relatively high, and the mixing ratio of the cementing material and tailings sand is only 1: (3-5), so the cost of this cemented filling material is relatively high, and the filling cost is also high
This technology uses more Portland cement clinker, although the early strength is high, but the cost is also high, and the fluidity is poor after mixing with tailings
[0007] In short, the filling and consolidation materials disclosed in the existing literature cannot achieve the goals of good fluidity, high early strength, and low cost at the same time.

Method used

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  • Filling and consolidating powder for mining purposes and use thereof
  • Filling and consolidating powder for mining purposes and use thereof
  • Filling and consolidating powder for mining purposes and use thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] The proportioning (weight) of each component in the consolidated powder of the present invention is:

[0034] Cement clinker 4%; Metakaolin 9%; Carbide slag 8%; Phosphogypsum 22%; Fly ash 20%; Red mud 12%; Blast furnace slag 16.5%; Limestone 7%; Water reducer 1%; Sodium hydroxide 0.5%.

[0035] The production method is to accurately weigh cement clinker, blast furnace slag and limestone in proportion, put them into a ball mill and grind them to a fineness of 300 mesh, then weigh the rest of the materials accurately in proportion and put them into a ball mill to grind them to a fineness of 400-400 mesh. 600 mesh is enough.

[0036] When preparing filling slurry, first mix the mining tailings and water in proportion to form a uniform slurry, then add consolidation powder, the ratio of consolidation powder to tailings is 1: (6-12), and the concentration of the slurry is controlled at 60 % to 80%, after mixing evenly in the mixer, the slurry can be transported downhole th...

Embodiment 2

[0041] The proportioning (weight) of each component in the consolidated powder of the present invention is:

[0042] Cement clinker 5%; Metakaolin 10%; Carbide slag 6%; Phosphogypsum 24%; Fly ash 19%; Red mud 9%; Blast furnace slag 18.5%; Limestone 7%; Water reducing agent 1%, Sodium hydroxide 0.5%.

[0043] See Example 1 for the production method and filling material preparation method of Example 2, and will not be described in detail here.

[0044] The following table 2 shows the test results of the physical properties of the metal mine filling material formed by mixing the consolidation powder and tailings in Example 2 in three weight ratios of 1:8, 1:10, and 1:12.

[0045] Table II

[0046]

Embodiment 3

[0048] The proportioning (weight) of each component in the consolidated powder of the present invention is:

[0049] Cement clinker 3%; Metakaolin 9%; Carbide slag 14%; Phosphogypsum 20%; Fly ash 18%; Red mud 12%; Blast furnace slag 18.3%; Limestone 4%; Water reducing agent 1%, Sodium hydroxide 0.7%.

[0050] The preparation method is to accurately weigh cement clinker, blast furnace slag and limestone in proportion, put them into a ball mill and grind them to a fineness of 300 mesh, then weigh the rest of the materials accurately in proportion and put them into a ball mill to grind them to a fineness of 400- 600 mesh is enough.

[0051] When preparing coal mine filling slurry, the coal gangue is first crushed to an average particle size of 1.5mm, and the maximum particle size is not allowed to exceed 5mm, and the coal gangue powder and water are mixed in proportion to form a uniform slurry, and then the consolidation powder is added to solidify. The ratio of coal powder to ...

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Abstract

The invention discloses filling and consolidating powder for mining purposes and a use thereof. The filling and consolidating powder comprises the following raw materials in percentage by weight: 3-5% of portland cement clinker, 8-10% of metakaolin, 5-15% of carbide slag, 18-24% of phosphogypsum, 18-22% of fly ash, 9-14% of red mud, 15-19% of blast furnace slag, 4-10% of limestone, 0.8-1.2% of polycarboxylic acid type water reducing agent and 0.4-0.7% of sodium hydroxide and is prepared by uniformly mixing and grinding to get fine powder with 400 meshes-600 meshes. When the filling and consolidating powder is used, mining tailing or coal gangue is firstly mixed with water according to a proportion in a mixing machine for forming uniform slurry, and then the consolidating powder is further added, uniformly mixed and then conveyed to a downhole place by a pipeline for filling. The cost of the filling material blended by the consolidating powder disclosed by the invention is 50-70 yuan / ton, while the cost of the similar filling and consolidating powder is 90-110 yuan / ton; and compared with the prior art, the cost is greatly reduced and the filling effect is good.

Description

technical field [0001] The invention relates to a consolidation material for filling, especially a cementitious material for filling goafs in mines including coal mines and metal mines. Background technique [0002] With the continuous development of the national economy, the mining industry is also developing rapidly. However, when the mining of mineral resources ends, a large number of gobs will be formed underground, causing a large number of potential safety hazards to the country and people. At present, mine filling is an ideal way to solve the goaf, and in the mine filling process, filling cementing material plays a key role. In the traditional filling process, the filling cement material used is mainly cement. However, when cement is used as the cementing material, there are the following problems: the fluidity of the mixture during filling is poor, the early strength is low, and the cost is high. Granules, cement can not play its due role. There are also literatur...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/14E21F15/00
Inventor 张德平徐发翔王立华曲宝杰邱亚男田恒洲王云革
Owner ZIBO GEOLOGICAL MINE TECH SERVICE CENT
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