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Red mud-based slip-casting plugging material

A plugging material and red mud technology, applied in the field of plugging materials, can solve the problems of unsatisfactory sealing quality, low strength of plugging materials, and poor sealing, so as to reduce the phenomenon of autogenous shrinkage, drying shrinkage, and good water retention. Water separation performance, good sealing effect

Active Publication Date: 2018-07-27
太原理工恒基岩土工程科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In addition to the poor air permeability and undeveloped fractures of most of the extracted coal seams, the most important reason is that the sealing is not strict and the quality of the sealing is not ideal. The selection of sealing materials is particularly critical, and the air tightness is required
[0004] The invention patent CN201510830990.6 discloses an improved polyurethane plugging material for coal mines. Cheap
Invention patent CN201710373800.1 discloses a mining coal dust-based sealing grouting material. Although the cost is relatively low, the strength of the sealing material is low, and only 2-3 MPa cannot be well applied.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] This embodiment provides a red mud-based grouting plugging material, its raw materials: red mud 2kg, fly ash 4kg, PO42.5 ordinary silicon cement 3.5kg, sulfoaluminate cement 0.5kg, expansion agent 0.5%, gypsum 2.5%, defoamer 0.1%, water reducer 0.4%, silicon micropowder 3%, the required water is 7kg.

[0031] a. All solid raw materials are added to the mixer according to the proportion and mixed evenly.

[0032] b. Add water reducing agent into water and mix evenly.

[0033] c. Add water into the blender and stir for 3 minutes.

[0034] The initial fluidity is 350mm, and the fluidity after 30 minutes is 320mm; the 3d strength is 5.3MPa, and the 28d strength is 7MPa; the air permeability coefficient is 1×10 -8 m 2 , 3d vertical expansion rate of 0.5%.

Embodiment 2

[0036] This embodiment provides a red mud-based grouting plugging material, its raw materials: red mud 4kg, fly ash 2kg, PO42.5 ordinary Portland cement 3.5kg, sulfoaluminate cement 0.5kg, expansion agent 0.5% , 5% gypsum, 0.2% defoamer, 0.5% water reducer, 3% silica powder, the required water is 6.6kg.

[0037] a. All solid raw materials are added to the mixer according to the proportion and mixed evenly.

[0038] b. Weigh the water reducer and add it into the water, and mix evenly.

[0039] c. Add the mixed water into the evenly mixed dry material in proportion, and then stir well.

[0040] The initial fluidity is 342mm, and the fluidity after 30 minutes is 300mm; the 3d strength is 5.7MPa, and the 28d strength is 8MPa; the air permeability coefficient is 3.2×10 -8 m 2 , The vertical expansion rate is 0.8%.

Embodiment 3

[0042] This embodiment provides a red mud-based grouting plugging material, its raw materials: red mud 3kg, fly ash 3kg, PO42.5 ordinary silicon cement 3.2kg, sulfoaluminate cement 0.8kg, expansion agent 0.7%, gypsum 7%, defoamer 0.3%, water reducer 0.5%, silicon micropowder 5%, water 6.5kg.

[0043] a. All solid raw materials are added to the mixer according to the proportion and mixed evenly.

[0044] b. Weigh the water reducer and add it into the water, mix well.

[0045] c. Add the mixed water into the powder, and then stir well.

[0046] The initial fluidity is 300mm, and the fluidity after 30 minutes is 260mm; the 3d strength is 5.6MPa, and the 28d strength is 7.5MPa; the air permeability coefficient is 3×10 -8 m 2 , The vertical expansion rate is 0.8%.

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Abstract

The invention discloses a red mud-based slip-casting plugging material. The red mud-based slip-casting plugging material comprises the following components by weight percentage: 20-40% of red mud, 20-40% of fly ash, and 20-45% of cement, and the sum of the weight percentage is 100%; the red mud-based slip-casting plugging material also comprises an expansion component with an applied doping amountbeing 0.6-9% and a rheological component with the applied doping amount being 1.3-6%; wherein the expansion component comprises an expanding agent and an antifoaming agent, and the rheological component comprises a water reducer and silica micropowder. The red mud-based slip-casting plugging material mainly aims at a coal-mine gas hole-sealing leak-stopping material, and has the advantages of good plugging effect, high intensity after plugging, good air tightness, and less self-constriction at a later period.

Description

technical field [0001] The invention belongs to the technical field of plugging materials, in particular to a red mud-based grouting plugging material. Background technique [0002] Red mud is a waste produced by the alumina industry, and its composition is extremely complex. Generally, about 1-1.3 tons of red mud are produced for every ton of alumina produced. A large amount of red mud has had a direct or indirect impact on people's production and life. With the increasing output of red mud and the enhancement of people's awareness of environmental protection, it is necessary to limit the harm of red mud to the maximum extent, use multiple channels and improve red mud. Mud is imminent. [0003] The low concentration of coal seam gas drainage and the rapid attenuation of concentration value are the main problems facing my country's coal seam gas at present. The reason for this is poor air permeability and undeveloped fissures in most of the extracted coal seams. The most i...

Claims

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Application Information

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IPC IPC(8): C04B28/14C04B111/70
CPCC04B28/14C04B2111/70C04B2201/50C04B18/0409C04B18/08C04B7/02C04B24/129C04B7/32C04B2103/50C04B2103/302C04B18/146
Inventor 陈潇刘志林陈伟
Owner 太原理工恒基岩土工程科技有限公司
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