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Cementing materials for filling, slurry and preparing and filling processes

A technology of cementitious material and filling slurry, which is applied in the fields of filling, mining equipment, solid waste management, etc., can solve the problems of high filling concentration of paste, blocked pipes, polluted underground environment, etc., and achieves the effect of good strength effect.

Inactive Publication Date: 2006-01-25
CHINA UNIV OF MINING & TECH (BEIJING) +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] (2) Ore bodies with unstable ore and surrounding rocks;
Downhole dehydration inevitably takes away some cement and fine-grained tailings, which not only causes waste of materials, but also seriously pollutes the downhole environment, greatly increasing the cost of downhole drainage and sewage discharge
[0019] (3) The filling body has low strength and poor effect
[0022] (1) The paste filling concentration is high, the slurry preparation process is complicated, and the quality is difficult to control
The weight concentration of paste filling is generally above 80%, which is close to the limit concentration, and there is little room for adjustment. Once a problem occurs in a certain link, it is difficult to guarantee the quality of the slurry
[0023] (2) Paste slurry transportation is very difficult
During the transportation process, the slurry wears and damages the transportation pipeline very seriously, and pipe blockage and pipe breakage often occur, which affects the stability and safety of production.
[0024] (3) Large equipment investment
Due to the high cost of mine filling, so far most of the mine space after mining has not been filled and left to collapse naturally, resulting in ground subsidence, dangerous underground working environment, high resource loss and dilution rate, groundwater pollution, and ground pollution. The construction and ecological environment were seriously damaged and even caused catastrophic damage in some mining areas

Method used

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  • Cementing materials for filling, slurry and preparing and filling processes
  • Cementing materials for filling, slurry and preparing and filling processes
  • Cementing materials for filling, slurry and preparing and filling processes

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0130] (1) The distribution ratio of each component of the gelling material used for paste filling

[0131] Component A (water-quenched iron-making blast furnace slag 50% and water-quenched ferromanganese blast furnace slag 30%) 80%

[0132] Component B (fluorogypsum 6% and dihydrate gypsum 4%) 10%

[0133] Component C (lime) 9%

[0134] Component F (sodium hydroxide 0.7%, lithium carbonate 0.01% and tartaric acid 0.29%) 1%

[0135] Using a process similar to the production of cement, A, B, C, and F are made into a specific surface area of ​​3800 cm by batching, grinding, and homogenization according to the above ratio. 2 / g of the gelling material for later use.

[0136] (2) The ratio of paste-like gelling filling slurry and the compressive strength of paste-like filling are shown in Table 4

[0137] The compressive strength of paste-like cemented filling slurry with a weight concentration of 78% is prepared by using graded tailings and overflow tailings as aggregates and...

Embodiment 2

[0141] (1) The distribution ratio of each component of the gelling material used for paste filling

[0142] Component A (water-quenched iron-making blast furnace slag 40% and water-quenched phosphorus slag 25%) 65%

[0143] Component B (dihydrate gypsum 4% and anhydrite 3%) 7%

[0144] Component C (lime 7% and steel slag 5%) 12%

[0145] Component D (fly ash 10% and boiling slag 5%) 15%

[0146] Component F (sodium carbonate 0.8%, lithium hydroxide 0.01% and citric acid 0.19%) 1%

[0147] Using a process similar to the production of cement, A, B, C, D, and F are made into a specific surface area of ​​4000 cm by batching, grinding, and homogenization according to the above ratio. 2 / g of the gelling material for later use.

[0148] (2) The ratio of paste-like cemented filling slurry and the compressive strength of paste-like filling

[0149] The slurry with a weight concentration of 80% was prepared by using river sand, silt and cementitious materials for filling like past...

Embodiment 3

[0152] (1) The distribution ratio of each component of the gelling material used for paste filling

[0153] Component A (water-quenched iron blast furnace slag) 35%

[0154] Component B (dihydrate gypsum) 10%

[0155] Component C (lime 5% and steel slag 15%) 20%

[0156] Component D (silica fume 1% and boiling slag 14%) 15%

[0157] Component E (limestone powder 8% and coal gangue powder 10%) 18%

[0158] Component F (sodium carbonate 1.5%, potassium sulfate 0.3%, borax 0.2%) 2%

[0159] Using a process similar to the production of cement, A, B, C, D, E, F are made into a specific surface area of ​​4500cm through batching, grinding and homogenization according to the above ratio. 2 / g of the gelling material for later use.

[0160] (2) The ratio of paste-like cemented filling slurry and the compressive strength of paste-like filling

[0161] Use river sand, silt and cementitious materials for filling like paste to prepare a slurry with a weight concentration of 80%.

[...

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Abstract

A gelatining material similar to cream for filling underground working surface is preapred from the Ca-contained non-crystal and microcrystal material, alkali and / or sulfur contained exciting material, active material, aggregate and regulator. A filling slurry is prepared from said gelatining material, filling aggregate, fine particles, regulator and water through heating to at least 18 deg.C and proportional mixing.

Description

technical field [0001] The invention belongs to the technical field of cemented filling, and relates to filling cementitious materials, preparation of slurry, filling process and application method. Background technique [0002] With the increase of mining depth and the increasingly complex mining conditions, the underground safety issues of resource mining, the improvement of resource recovery rate and the protection of the surface ecological environment have attracted more and more attention from the world. The traditional empty field method or subsidence method Mining can no longer meet the requirements of sustainable exploitation of resources, but the method of filling and filling mining has been greatly developed and widely used. [0003] The filling mining method refers to filling (filling) the cavity formed after underground mining with filling materials as the mining face advances, so as to protect the safety of the underground working space, improve the resource rec...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B18/04C04B28/00C04B22/00C04B24/00E21F15/00
CPCY02W30/91
Inventor 孙恒虎徐维瑞盖光举黄玉诚杨宝贵刘华生毛信理
Owner CHINA UNIV OF MINING & TECH (BEIJING)
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