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Early-strength type mining sealing material

A sealing material and early-strength technology, applied in the direction of drilling compositions, chemical instruments and methods, etc., can solve the problems that the early strength is difficult to meet the use requirements, the length of the sealing hole is difficult to control, and the setting time is long, etc., to achieve faster The process of hydration reaction, gas drainage is durable and stable, and the effect of early strength is remarkable

Active Publication Date: 2017-06-13
ANHUI UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The technical problem faced by the present invention is to provide a new type of mine sealing material, which can greatly improve the early strength of the sealing material, and has a good fluidity and plasticity. The early strength of the sealing material is difficult to meet the use requirements, the setting time is long, the sealing length is not easy to control, the plasticity is low, and the cost is too high, so as to improve the success rate of sealing

Method used

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  • Early-strength type mining sealing material
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Experimental program
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Effect test

Embodiment 1

[0026] Water: 40%, calcium thiocyanate: 0.2%, triethanolamine: 0.03%, polycarboxylate superplasticizer: 0.1%. Mix the above materials and stir well before use. When in use, the prepared material is mixed with Portland cement clinker to form a slurry. The experimental results are shown in Table 1.

[0027] Table 1 Experimental results of sealing material properties

[0028]

[0029] It can be seen from Table 1 that compared with the reference group, the fluidity of the experimental group has been greatly improved, which can perfectly meet the needs of long-distance sealing; the setting time is slightly longer than that of the reference group; the 1-day compressive strength is higher than that of the reference group 66% improvement and 24% improvement in 7-day compressive strength. Its various performance indicators can fully meet the requirements for the use of sealing materials.

Embodiment 2

[0031] Water: 40%, calcium thiocyanate: 0.1%, calcium fluoroaluminate: 4%, triethanolamine: 0.02%, polycarboxylate superplasticizer: 0.1%. Mix the above materials and stir well before use. When in use, the prepared material is mixed with Portland cement clinker to form a slurry. The test results are shown in Table 2.

[0032] Table 2 Experimental results of sealing material properties

[0033]

[0034] It can be seen from Table 2 that the initial setting time of the experimental group is 443min, the final setting time is 496min; the fluidity is 213mm; the 1-day compressive strength is 14.5MPa, the 7-day compressive strength is 39.1MPa, and the 1-day compressive strength is higher than that of the reference group 99%, 7-day compressive strength increased by 38%.

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Abstract

The invention relates to an early-strength type mining sealing material. The sealing material comprises the following components in parts by weight: 0.1-8% of inorganic salt early-strength components, 0.1-0.8% of organic early-strength components of, 0.1-0.5% of water reducing components, and the balance of cement clinker. The finished product can be obtained by mixing the components according to the proportion and evenly stirring and dispersing. The sealing material has an early-strength effect, the one-day strength is 14.5MPa, three-day strength is 26.7MPa, seven-day strength is 39.1MPa, the fluidity of cement past is greater than 200mm, the coagulation time is shorter than 500min, the pumping performance is not affected while the early-strength performance is improved, the sealing material can completely meet the use demands for mine gas pumping and deep hole blasting sealing, the blasting waiting time can be greatly shortened, thus being safer. Furthermore, the material can be prepared underground on site, and is non-toxic and pollution-free. The material not only can be used for sealing for pumping mine gas or drilling during blasting of deep holes, but also can be used for blocking other related cracks.

Description

technical field [0001] The invention relates to a mine sealing material, in particular to an early-strength type sealing material suitable for drilling and sealing holes in coal mine gas drainage. Background technique [0002] Coal is the main energy source in our country. However, the mining process is also accompanied by many disasters and accidents. Gas outburst has become a prominent problem in coal mine safety production. Borehole drainage has always been the basic means of coal mine gas control. After the drilling is completed, the drilling is generally sealed, and the sealing of the drilling is a key part, and the quality of the sealing has a strong impact on the gas drainage effect. [0003] At present, the direct sealing technology for coal seam gas pressure measurement and drainage drilling is to use organic materials or inorganic materials for sealing, including artificial clay sealing, mechanical cementing mortar sealing, and foaming polymer material sealing. Am...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K8/467C04B28/04
CPCC04B28/04C04B2111/00724C09K8/426C09K8/467C04B22/142C04B24/122C04B2103/302C04B22/124
Inventor 刘健吉小利罗麒吴芬王其其
Owner ANHUI UNIV OF SCI & TECH
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