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Hole sealing material for gas extraction and using method of hole sealing material

A sealing material and gas extraction technology, applied in gas discharge, other household appliances, applications, etc., can solve the problems of poor stability, reduced sealing effect, and large environmental pollution, and achieve high early strength and high sealing effect. , the effect of fast condensation

Active Publication Date: 2020-11-10
LIUPANSHUI NORMAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] 1) Polyurethane and other polymer chemical materials are expensive and pollute the environment;
[0005] 2) The cement-based sealing material has poor sealing performance and poor sealing effect;
[0006] 3) A large number of violent chemical reactions may cause fire or gas explosion, and the safety is poor;
[0007] 4) The continuous disturbance of subsequent mining projects will reduce the sealing effect and poor stability

Method used

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  • Hole sealing material for gas extraction and using method of hole sealing material

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Comparison scheme
Effect test

Embodiment 1

[0029] A coal mine mines the No. 3 coal seam, but the No. 3 coal seam has a high gas content, and underground gas drainage must be carried out. Conventional hole sealing technology has repeatedly caused gas leakage and gas exceeding the limit. Therefore, the sealing material combined with cement and microorganisms is used. The sealing effect is as follows:

[0030] The sealing materials used are as follows: 60 parts of cement, 10 parts of fine sand, 10 parts of bentonite, 20 parts of diatomite immobilized microorganisms, microbial nutrient solution, 15 parts of flame retardant, 5 parts of cement admixture and 30 parts of magnetized water, The cement is expansive cement, the bentonite is calcium-based bentonite, and the microorganisms in the diatomite-immobilized microorganisms are Bacillus pasteurianum. The mass / volume ratio is 1:10g / mL for mixing, stirring for 45min and then standing for 10min, filtering out the particulate matter, washing with normal saline, and freeze-dryin...

Embodiment 2

[0039] A coal mine mines the No. 3 coal seam, but the No. 3 coal seam has a high gas content, and underground gas drainage must be carried out. Conventional hole sealing technology has repeatedly caused gas leakage and gas exceeding the limit. Therefore, the sealing material combined with cement and microorganisms is used. The sealing effect is as follows:

[0040]The sealing materials used are as follows: 70 parts of cement, 15 parts of fine sand, 5 parts of bentonite, 40 parts of diatomite immobilized microorganisms, microbial nutrient solution, 10 parts of flame retardant, 10 parts of cement admixture and 35 parts of magnetized water, The cement is expansive cement, the bentonite is calcium-based bentonite, and the microorganisms in the diatomite-immobilized microorganisms are Bacillus pasteurianum. The mass / volume ratio is 1:10g / mL for mixing, stirring for 60 minutes and then standing for 10 minutes, filtering out the particulate matter, washing with normal saline, and fre...

Embodiment 3

[0049] A coal mine mines the No. 3 coal seam, but the No. 3 coal seam has a high gas content, and underground gas drainage must be carried out. Conventional hole sealing technology has repeatedly caused gas leakage and gas exceeding the limit. Therefore, the sealing material combined with cement and microorganisms is used. The sealing effect is as follows:

[0050] The sealing materials used are as follows: 50 parts of cement, 5 parts of fine sand, 15 parts of bentonite, 10 parts of diatomite immobilized microorganisms, microbial nutrient solution, 10 parts of flame retardant, 5 parts of cement admixture and 15 parts of magnetized water, The cement is expansive cement, the bentonite is calcium-based bentonite, and the microorganisms in the diatomite-immobilized microorganisms are Bacillus pasteurianum. The mass / volume ratio is 1:10g / mL for mixing, stirring for 30 minutes and then standing for 10 minutes, filtering out the particles, washing with normal saline, and freeze-dryin...

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Abstract

The invention provides a hole sealing material for gas extraction and a use method of the hole sealing material, and relates to the technical field of mine safety engineering. The hole sealing material comprises the following raw materials in parts by weight of cement, fine sand, bentonite, diatomite immobilized microorganisms, a microorganism nutrient solution, a flame retardant, 5-10 parts of acement additive and magnetized water, wherein microorganisms in the diatomite immobilized microorganisms are bacillus pasteurii. The preparation method of the diatomite immobilized microorganisms comprises the following steps of mixing diatomite with a bacillus pasteurii solution according to a mass / volume ratio of 1: 10g / mL, and performing freeze drying to obtain the diatomite immobilized microorganisms, and the mass ratio of the microorganism nutrient solution to the bacillus pasteurii solution is (1-2): 1. The hole sealing material for gas extraction and the using method of the hole sealingmaterial are simple and easy to implement. The use of high polymer materials is reduced, and environmental friendliness is achieved. Not only is a simple chemical reaction performed, but also the safety of the biochemical reaction is higher. The microorganisms can repair a large number of micropores and cracks, the hole sealing effect is high, and the stability is high.

Description

technical field [0001] The invention relates to the technical field of mine safety engineering, in particular to a sealing material for gas drainage and a use method thereof. Background technique [0002] Coal bed gas, also known as coal bed methane, is self-generated and self-storage in coal seams. In recent years, with the increase of mining depth and mining intensity in coal mines, the geological conditions have become more and more complex. Frequent gas disasters have seriously threatened the life safety of mine workers and restricted the development of mine production. However, coalbed methane is an economical combustible gas, a clean, convenient and efficient energy source, and its calorific value is 33.5-36.8MJ / m 3 , and there is no environmental pollution problem. Vigorously developing coalbed methane can not only make full use of underground resources, but also improve mine safety conditions and economic benefits, and is conducive to improving local environmental ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21B33/13E21F7/00C04B28/00C04B38/10
CPCE21B33/13E21F7/00C04B28/00C04B38/10C04B14/06C04B14/104C04B14/08C04B2103/0001C04B2103/63C04B2103/12C04B24/14C04B22/002
Inventor 高颖李涛曹新奇司俊鸿
Owner LIUPANSHUI NORMAL UNIV
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