Microbial seal-healing capsule for coal mine air leakage plugging as well as preparation method and application of microbial seal-healing capsule

A microbial and self-healing technology, applied in the field of coal mine air leakage plugging materials, can solve the problems of secondary cracking of cracks, spontaneous combustion of coal in goafs, failure to detect and repair in time, etc., to achieve the effect of prolonging life and uniform repair.

Inactive Publication Date: 2018-05-01
SHANDONG UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the existing air leakage plugging materials will inevitably produce a large number of micro-cracks under the action of mine pressure. If these micro-cracks cannot be found and repaired in time, they will communicate with the goaf and form air leakage channels, which will cause coal mines in the goaf. Spontaneous combustion, causing irreparable economic losses and casualties
[0003] For cracks in air plugging materials, the current main repair methods are post-event repair or regular repair. However, this passive and planned repair method is mostly aimed at cracks that are visible to the naked eye. Due to the limitations of other problems, the cracks are prone to secondary cracking
In addition, in the actual leak plugging material, there are many microcracks inside. Due to the limitations of the current detection technology, it is still difficult to detect and repair these microcracks.

Method used

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  • Microbial seal-healing capsule for coal mine air leakage plugging as well as preparation method and application of microbial seal-healing capsule
  • Microbial seal-healing capsule for coal mine air leakage plugging as well as preparation method and application of microbial seal-healing capsule

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Example 1: The microbial spores used in this example are spores of Bacillus coriolis, and the selected wall material is at least one of epoxy resin, melamine-formaldehyde resin, urea-formaldehyde resin, polyurethane, polyvinyl alcohol and cellulose acetate butyrate The main material of the selected plugging air is cement material.

[0028] Weigh 5g of inosine, 25g of yeast powder, 5g of hydroxypropyl methylcellulose, and 150g of microcrystalline cellulose, and mix them evenly. At the same time, take 150g of water and add 3g of dry spore powder to make it evenly dispersed, and then weighed 150g Calcium nitrate is dissolved in water with spores dispersed, and then the liquid solution is added to the evenly mixed inosine, yeast powder, hydroxypropyl methyl cellulose, microcrystalline cellulose, and stirred evenly to make it into a cluster. The mixture is slowly added to the multifunctional granulator for extrusion, selected from a mesh plate of 40 mesh, and the cooling system...

Embodiment 2

[0031] Embodiment 2: The microbial spores used in this embodiment are at least one of Bacillus pasteurii, Bacillus sphaericus, Bacillus sphaericus, Bacillus kokeli, Bacillus pseudostrongy, Bacillus subtilis, and nitrifying bacteria The selected wall material is at least one of porous lightweight aggregate, sodium alginate, silica gel, clay particles, diatomaceous earth, and ceramsite, and the selected main material for plugging air is fly ash foam material.

[0032] Weigh 3 g of yeast powder, 5 g of peptone, and 1000 mL of deionized water to prepare a microbial culture medium, and adjust the pH to 9.0 by adding NaOH solution dropwise. After autoclaving at 121°C for 30 minutes and cooling to room temperature, inoculate Bacillus pasteurianus and add 30 mL of 4mol / L urea solution. Incubate with shaking at 30°C with an oscillation frequency of 170r / min for 24h.

[0033] The porous lightweight aggregate is passed through a 0.075mm sieve and washed with water, with a particle size rangi...

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Abstract

The invention discloses a microbial seal-healing capsule for coal mine air leakage plugging as well as a preparation method and application of the microbial seal-healing capsule. Dry powder of bacterial spores is uniformly dispersed in water, a suitable substrate is selected according to the kinds of the bacterial spores, the substrate is added into a uniformly-dispersed mixed solution according to a certain ratio of the bacterial spores to the substrate and is uniformly stirred to be agglomerated, the agglomerated mixture is slowly added into a multifunctional granulator and is extruded, a cooling system is started, the temperature of the material is maintained, and the extruded strip-shaped substance is added into a rounder for rounding and is sieved and dried to obtain microparticles; and the microbial seal-healing capsule is prepared from the microparticles and a wall material by using a vacuum impregnation method or an interfacial polymerization method, the microbial seal-healingcapsule and a main material for air leakage plugging are mixed to be used, once concrete is cracked, the spores inside the material can be activated to normally metabolize, and calcium carbonate is continuously induced to be precipitated, so that the self-repair of cracks is realized.

Description

Technical field [0001] The invention relates to a coal mine air leakage plugging material, in particular to a coal mine air leakage plugging microorganism self-healing capsule, and a preparation method and application thereof. Background technique [0002] Coal spontaneous combustion is a major hidden danger that threatens the safety of coal mines in our country. Stopping air leakage is an important measure to prevent spontaneous combustion of coal. Cement materials, fly ash foam materials, polymer spraying materials, colloids, clay composite materials, foam materials, and polymer elastomers are currently commonly used wind-stopping materials. These materials have played an important role in ensuring safe production in coal mines. However, the existing wind-stopping materials will inevitably produce a large number of micro-cracks under the action of rock pressure. If these micro-cracks cannot be found and repaired in time, they will communicate with the goaf and form air leakage...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B24/38C04B20/10
CPCC04B40/0039C04B20/10C04B2103/0001C04B24/281C04B24/00C04B24/383C04B22/085C04B24/305C04B24/307C04B24/282C04B24/2623C04B18/027
Inventor 胡相明吴明跃程卫民张茜赵艳云
Owner SHANDONG UNIV OF SCI & TECH
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