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Preparation method of plugging material of coal mine gas drainage drilling hole

A technique for draining drilling and plugging materials, which is applied in the direction of drilling compositions, chemical instruments and methods, etc., and can solve the problems of poor water resistance and corrosion resistance in coal mine gas drainage drilling and plugging construction quality , the cells are not uniform and dense enough to achieve the effects of wide application range, short production cycle and low production cost

Inactive Publication Date: 2013-11-13
CHONGQING UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The main disadvantages of this method are: ①The prepolymerization reaction needs to be heated to 50-90°C, which has high energy consumption, and needs supporting heating equipment and high-temperature reaction equipment, thereby increasing the production cost, and heating will also increase the volatilization of toxic substances , pollute the environment, and the safety of production is poor; ② Prepolymerization reaction takes 0.5 to 2.5 hours to synthesize prepolymers, and then reacts with water to make products. The production cycle is long, which further increases the production cost
③The cells of the product prepared by this method are not uniform and compact, and the water resistance and corrosion resistance are not good, which leads to a decline in the construction quality of coal mine gas drainage drilling plugging

Method used

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  • Preparation method of plugging material of coal mine gas drainage drilling hole
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  • Preparation method of plugging material of coal mine gas drainage drilling hole

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] The specific steps of a preparation method of a coal mine gas drainage drilling plugging material are as follows:

[0036] (1) material preparation

[0037] Prepare black material and white material separately (all solid reagents need to be dried) and set aside. which is

[0038] The components and mass percentages of the black material are:

[0039] Diphenylmethane diisocyanate (MDI) 60%

[0040] Polymethylene polyphenylisocyanate (PAPI) 40%

[0041] The components and mass percentages of the white material are:

[0042]

[0043] (2) Preparation of white material solution

[0044] After the first step (1) is completed, according to the mass (g) of the white material prepared in the first step: the ratio of the volume (m1) of water is 1:0.04, under the condition of 60 rpm , water was added into the white material, and the stirring was continued for 5 minutes to prepare the white material solution.

[0045] (3) Preparation of rigid polyurethane foam

[0046] A...

Embodiment 2

[0048] A method for preparing coal mine gas drainage drilling plugging material, its specific steps are the same as those in Embodiment 1, wherein:

[0049] In step (1),

[0050] Components of black material and their mass percentages:

[0051] Diphenylmethane diisocyanate (MDI) 80%

[0052] Polymethylene polyphenyl isocyanate (PAPI) 20%

[0053] The composition and mass percentage of white material:

[0054]

[0055]

[0056] In the (2) step, the mass (g) of the white material prepared in the (1) step: the ratio of the volume (ml) of water is 1: 0.06, the rotating speed is 70 rpm, and stirred for 10 min.

[0057] In the (3) step, the black material that the (1) step is ready: the quality of the white material of the white material solution that (2) step makes is the ratio of 1: 1.2, and temperature is 25 ℃, and the rotating speed is 80 revs / Minute, stir for 30s, and let the mixture stand for 7.5min.

Embodiment 3

[0059]A method for preparing coal mine gas drainage drilling plugging material, its specific steps are the same as those in Embodiment 1, wherein:

[0060] In step (1),

[0061] Components of black material and their mass percentages:

[0062] Diphenylmethane diisocyanate (MDI) 100%

[0063] Polymethylene polyphenylisocyanate (PAPI) 0%

[0064] The composition and mass percentage of white material:

[0065]

[0066] In the (2) step, the mass (g) of the white material prepared in the (1) step: the ratio of the volume (ml) of water is 1: 0.08, the rotating speed is 80 rpm, and stirred for 15 min.

[0067] In the (3) step, the black material prepared in the (1) step: the quality of the white material of the white material solution prepared in the (2) step is a ratio of 1: 1.3, the temperature is 40°C, and the rotating speed is 100 rpm Divide, stir for 35s, and let the mixture stand for 10min.

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Abstract

The invention discloses a preparation method of a plugging material of a coal mine gas drainage drilling hole and relates to a preparation method of hard polyurethane foam in the plugging material of the coal mine gas drainage drilling hole. The preparation method comprises the following steps: preparing materials (black materials and white materials); and mixing the materials for simple technologies such as chain extension reaction and foaming reaction to obtain a product. The preparation method has the characteristics that high-temperature equipment and heating equipment are not used; in the production process, energy is saved, and the environment is not polluted; and production is safe, production cost is low, and the like. The product prepared by using the method has the advantages of even and compact abscess, no water absorbency and corrosion resistance. The preparation method can be widely applied to preparation of hard polyurethane foam in the plugging material of the coal mine gas drainage hole.

Description

technical field [0001] The invention belongs to the technical field of coal mine gas drainage drilling plugging materials, and in particular relates to a preparation method of rigid polyurethane foam in coal mine gas drainage drilling plugging materials. Background technique [0002] The safety of coal mine production mainly depends on the quality of the coal mine gas drainage drilling system. Hole quality is especially important. With the rapid development of organic polymer materials, rigid polyurethane foam (that is, black and white material double-liquid system sealing material) has the characteristics of high expansion multiple, short curing time, high sealing efficiency, small shrinkage rate and high sealing quality. And generally applied. In order to ensure the safety of coal mine production, it is a very important subject in this technical field to study the preparation method of rigid polyurethane foam. [0003] The preparation method of existing rigid polyuretha...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G18/76C08G18/48C08G18/24C08J9/08C08K5/3492C08K5/526C08K5/29C08K5/12C09K8/44C08G101/00
Inventor 周志明赵志袁小芳陈红梅羡小超李满满王丙洪张龙
Owner CHONGQING UNIV
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