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Filling material and using method thereof

A filling material and modification technology, applied in the field of filling materials, can solve the problems of low cohesion of filling paste, easy segregation of slurry, increased bleeding, etc., achieve low cohesion, reduce use and treatment costs , the effect of large water permeability coefficient

Active Publication Date: 2019-10-15
河北充填采矿技术有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Aiming at the problems of low cohesion of filling paste, easy segregation of slurry, increased bleeding and low compressive strength when the existing goaf filling material uses aeolian sand as raw material, the invention provides a filling material and how to use it

Method used

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  • Filling material and using method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] A filling material, including the following components in mass percentage:

[0032] 8% cement, 30% fly ash, 25% coal gangue, 35% aeolian sand, 2% plant fiber;

[0033] Described cement comprises the component of following mass percentage:

[0034] Modified mineral powder 55%, composite gypsum 25%, Portland cement clinker 12%, composite admixture 8%.

[0035] Wherein, fly ash comprises the component of following mass content: 45% SiO 2 , 20% Al 2 o 3 , 6% FeO, 5% Fe 2 o 3 , 2% CaO and 1% TiO 2 ; The sieve residue of fly ash passing through the 45μm square hole sieve is 20%, the loss on ignition is 7%, the water requirement ratio is 98%, SO 3 The mass content is 1.5%.

[0036]The particle size of coal gangue is ≤25mm, and the coal gangue with particle size ≤5mm accounts for 55% of the total coal gangue mass; In the sub-workshop, the vibrating screen is used for preliminary screening, and the coal gangue with a particle size of ≤25mm is transported to the coal gan...

Embodiment 2

[0046] A filling material, including the following components in mass percentage:

[0047] 9% cement, 28% fly ash, 28% coal gangue, 34% aeolian sand, 1% plant fiber;

[0048] Described cement comprises the component of following mass percentage:

[0049] Modified mineral powder 58%, composite gypsum 22%, Portland cement clinker 11%, composite admixture 9%.

[0050] Wherein, fly ash comprises the component of following mass content: 50% SiO 2 , 25% Al 2 o 3 , 8% FeO, 6% Fe 2 o 3 , 3% CaO and 2% TiO 2 ; The sieve residue of fly ash passing through the 45μm square hole sieve is 15%, the loss on ignition is 5%, the water requirement ratio is 101%, SO 3 The mass content is 2%.

[0051] The particle size of coal gangue is less than or equal to 25mm, and the coal gangue with a particle size of less than or equal to 5mm accounts for 60% of the total coal gangue mass; the crushing process of coal gangue is firstly screened and then crushed, and the hand-selected raw coal gangue...

Embodiment 3

[0061] A filling material, including the following components in mass percentage:

[0062] 10% cement, 25% fly ash, 30% coal gangue, 30% aeolian sand, 5% plant fiber;

[0063] Described cement comprises the component of following mass percentage:

[0064] Modified mineral powder 60%, composite gypsum 20%, Portland cement clinker 10%, composite admixture 10%.

[0065] Wherein, fly ash comprises the component of following mass content: 55% SiO 2 , 30% Al 2 o 3 , 10% FeO, 8% Fe 2 o 3 , 5% CaO and 2% TiO 2 ; The sieve residue of fly ash passing through the 45μm square hole sieve is 12%, the loss on ignition is 8%, the water requirement ratio is 103%, and the SO 3 The mass content is 3%.

[0066] The particle size of coal gangue is ≤25mm, and the coal gangue with a particle size of ≤5mm accounts for 65% of the total coal gangue quality; In the sub-workshop, the vibrating screen is used for preliminary screening, and the coal gangue with a particle size of ≤25mm is transpor...

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Abstract

The invention relates to the technical field of mining industry mining filling, and concretely discloses a filling material and a using method thereof. The filling material comprises 8-10% of a cementing agent, 25-30% of fly ash, 25-30% of coal gangue, 30-35% of aeolian sands and 1-5% of plant fibers; and the cement includes, by mass, 55-60% of a modified mineral powder, 20-25% of composite gypsum, 10-12% of a Portland cement clinker and 8-10% of a compound admixture. A paste formed by the filling material in the use process has the advantages of good cohesive force, good stability, low bleeding rate, high shear resistance, high compressive strength and low raw material cost, and solves the problem of difficulty in drawing of raw materials for the filling material in the aeolian sand area.

Description

technical field [0001] The invention relates to the technical field of mining mining and filling, in particular to a filling material and a using method thereof. Background technique [0002] The goaf in mining mining is usually artificially filled with filling materials to control the fracture of the overlying strata. This method can not only increase the recovery rate, reduce the dilution rate, but also control the surface subsidence. The filling materials can be fly ash and coal gangue. , tailings, slag and other solid waste, while meeting the filling needs, it also realizes green mining. [0003] In the goaf filling technology, the commonly used filling material is to process coal gangue, fly ash, industrial slag, municipal solid waste and water on the ground to make a paste slurry, and use a filling pump or gravity pressure to pass through the pipeline. Transport the filling material to the underground to form an overlying rock support system dominated by paste filling...

Claims

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Application Information

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IPC IPC(8): C04B28/14
CPCC04B28/142C04B2201/50C04B2111/00724C04B2111/00146C04B18/141C04B18/08C04B7/02C04B18/12C04B14/068C04B18/24C04B22/00C04B22/06C04B22/143C04B24/22C04B24/04C04B22/14C04B20/0076C04B2103/0068C04B2103/302C04B2103/52
Inventor 孙春东王学伟秦大健卢志敏郝永超王英杨洪增董小娟
Owner 河北充填采矿技术有限公司
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