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Mining goaf filling material prepared from mine tailings

A filling material and filling material technology, used in applications, household appliances, ceramic products, etc., can solve problems such as shortening the service life of filling holes and filling pipes, easy segregation during filling, affecting the stability of filling body quality, etc., and achieve improvement. The effect of downhole operating environment, improving filling efficiency and reducing filling cost

Pending Publication Date: 2021-12-17
NORTHWEST RES INST OF MINING & METALLURGY INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The main problems existing in the actual production process of the existing filling process are: the fluidity of the filling slurry is poor, a large amount of flushing water is required during the transportation process, resulting in a low slurry concentration, and segregation is easy to occur during the filling process, which affects the stability of the quality of the filling body The amount of mud flowing out from the top overflow of filling is about 5‰~10‰ of the total filling amount, which not only pollutes the stope, but also mixes the mud into the ore, resulting in ore dilution; in addition, during the slurry transportation process, the pipeline wears Larger, shortens fill bore and fill tube life

Method used

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  • Mining goaf filling material prepared from mine tailings
  • Mining goaf filling material prepared from mine tailings
  • Mining goaf filling material prepared from mine tailings

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] The content of each component is: 6kg of alkylbenzene sulfonate, 10kg of fatty alcohol ether sulfate, 4kg of foam stabilizer, 6kg of coagulant, 15kg of Portland cement, 30kg of tailings, and 29kg of water.

[0025] Tailings are the residual tailings of non-ferrous mine beneficiation, with a particle size of 37μm-74μm.

[0026] At room temperature, the components are mixed and dissolved in proportion, and stirred evenly to form cement mortar. Use a foaming agent to add dilution water to make a foaming liquid, and then pass compressed air into the foaming liquid to form a bubble flow, and mix the air bubble flow with cement mortar to form a wet density of 1330kg / m 3 The foam mortar flow is used to fill the stope through the conveying pipeline.

[0027] The compressive strength values ​​of the test block at 3 days, 7 days and 28 days were tested by core sampling, see Table 1. It can be seen that the compressive strength reached 2.31Mpa in 28 days.

[0028] Table 1. Embo...

Embodiment 2

[0031] The content of each component is: 4kg of alkylbenzene sulfonate, 7.5kg of fatty alcohol ether sulfate, 3kg of foam stabilizer, 5kg of coagulant, 12.5kg of Portland cement, 27.5kg of tailings, and 40.5kg of water.

[0032] At room temperature, the components are mixed and dissolved in proportion, and stirred evenly to form cement mortar. Use a foaming agent to add dilution water to make a foaming liquid, and then pass compressed air into the foaming liquid to form a bubble flow, and mix the air bubble flow with cement mortar to form a wet density of 1330kg / m 3 The foam mortar flow is used to fill the stope through the conveying pipeline.

[0033] The compressive strength values ​​of the test block at 3 days, 7 days and 28 days were tested by core sampling, see Table 2. It can be seen that the compressive strength reached 2.15Mpa in 28 days.

[0034] Table 2. Embodiment 2 Foam tailings cemented filling material compressive strength

[0035]

Embodiment 3

[0037] The content of each component is: 2kg of alkylbenzene sulfonate, 5kg of fatty alcohol ether sulfate, 2kg of foam stabilizer, 4kg of coagulant, 10kg of portland cement, 25kg of tailings, and 52kg of water.

[0038] At room temperature, the components are mixed and dissolved in proportion, and stirred evenly to form cement mortar. Use a foaming agent to add dilution water to make a foaming liquid, and then pass compressed air into the foaming liquid to form a bubble flow, and mix the air bubble flow with cement mortar to form a wet density of 1330kg / m 3 The foam mortar flow is used to fill the stope through the conveying pipeline.

[0039] The compressive strength values ​​of the test block at 3 days, 7 days and 28 days were tested by core sampling, see Table 2. It can be seen that the compressive strength reached 2.24Mpa in 28 days.

[0040] Table 3. Embodiment 3 foam tailings cemented filling material compressive strength

[0041]

[0042] Comprehensive Table 1-3 ...

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Abstract

The invention relates to a mining goaf filling material prepared from mine tailings. The mining goaf filling material is prepared by uniformly mixing and stirring the following components in percentage by weight at normal temperature and normal pressure and foaming at high pressure: 2%-6% of alkylbenzene sulfonate, 5%-10% of fatty alcohol ether sulfate, 2%-4% of a foam stabilizer, 4%-6% of a coagulator, 10%-15% of Portland cement, 25%-30% of tailings, and the balance of water, wherein the sum of the weight percentages of the components is 100%. The filling material has good fluidity, increases the utilization rate of beneficiation tailings, realizes self-flow conveying of underground pipelines, reduces the water consumption, solves the problems of serious slurry sedimentation and segregation after dehydration of the filling body, well solves the prominent contradiction among the fluidity of the filling slurry, the water consumption and the quality of the filling body, not only effectively fills a mining goaf, but also reasonably and effectively utilizes the mine tailings.

Description

technical field [0001] The invention relates to the technical field of mine goaf filling materials, in particular to a mining goaf filling material made of mine tailings. Background technique [0002] Filling mining is a mining method that uses various appropriate filling materials to fill the goaf formed underground after the ore is mined. The purpose of filling the goaf is mainly to use the filling body to manage the ground pressure, to control the surrounding rock collapse and surface subsidence, to create safe and convenient conditions for the mining work, and to effectively protect the environment and ecological balance of the mining site. At present, most domestic mines adopt the downward cemented filling mining method and the cemented filling process of self-flowing pipeline conveying high-concentration fine sand. [0003] The main problems existing in the actual production process of the existing filling process are: the fluidity of the filling slurry is poor, a lar...

Claims

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Application Information

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IPC IPC(8): C04B28/04C04B38/10C04B111/40
CPCC04B28/04C04B2111/40C04B2201/50C04B2111/00724C04B2201/20C04B2111/00017C04B24/166C04B24/28C04B24/16C04B18/12C04B38/106C04B2103/0068
Inventor 梁友乾梁艺菲王琳玲李飞万昕奇王永斌吴斌
Owner NORTHWEST RES INST OF MINING & METALLURGY INST
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