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Polyurethane reinforced plugging agent for coal beds and preparation method thereof

A technology of polyurethane and plugging agent, which is applied in the field of polyurethane reinforced plugging agent for coal seams and its preparation, which can solve the problems of reduced safety factor, elimination of hidden dangers of accidents, difficult construction, etc., and achieves good control effect, good fluidity, and responsiveness fast effect

Active Publication Date: 2011-05-04
SHANDONG INOV POLYURETHANE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] With the improvement of coal mining technology, the rich gas in the coal seam can be extracted before coal mining and used for power generation. After the gas is extracted, the remaining holes often cause the gas to accumulate again. Cause spontaneous combustion and fire, and broken coal rocks are likely to lead to landslides, which brings inconvenience to mining and reduces the safety factor
So far, domestic methods such as filling mortar are time-consuming, laborious, and difficult to construct, and cannot guarantee that the hidden danger of accidents can be truly eliminated

Method used

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  • Polyurethane reinforced plugging agent for coal beds and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] A component material:

[0031] 330N: 72

[0032] TX-2: 16.5

[0033] TCPP: 10

[0034] Triethylenediamine: 1.5

[0035] B component material:

[0036] 330N: 60

[0037] Pure MDI: 40

[0038] Phosphoric acid: 10ppm

[0039] Preparation of component A materials: Put the measured 330N, TX-2, TCPP, and triethylenediamine into the reaction kettle, stir at room temperature for 3-4 hours, and then fill the barrel.

[0040] Preparation of component B material: Put 330N based on the formula into the reaction kettle at room temperature, raise it to 80-100°C, stir, vacuumize and dehydrate and degas for 2-3 hours, cool down to 10-40°C and add the measured pure MDI, React at 80-85°C for 2-3 hours, cool down to 10-40°C, add measured phosphoric acid, stir well, and pack into barrels.

[0041] When in use, mix components A and B evenly at a volume ratio of A:B=1:1, inject them into coal seam holes with a grouting pump and wait for solidification.

Embodiment 2

[0043] A component material:

[0044] 330N: 50

[0045] MN-3050: 18

[0046] TX-2: 13

[0047] TCPP: 16

[0048] Triethylenediamine: 3

[0049] B component material:

[0050] 330N: 68

[0051] Pure MDI: 20

[0052] MDI-50: 12

[0053] Benzoyl chloride: 10ppm

[0054] Preparation of component A materials: Put the measured 330N, MN-3050, TX-2, TCPP, and triethylenediamine into the reaction kettle, stir at room temperature for 3-4 hours, and then fill the barrel.

[0055] Preparation of component B materials: put 330N based on the formula into the reaction kettle at room temperature, raise it to 80-100°C, stir, vacuumize and dehydrate and degas for 2-3 hours, cool down to 10-40°C and add the measured pure MDI and For MDI-50, react at 80-85°C for 2-3 hours, cool down to 10-40°C, add measured benzoyl chloride, stir well, and pack into barrels.

[0056] When in use, mix components A and B evenly at a volume ratio of A:B=1:1, inject them into coal seam holes with a grouting...

Embodiment 3

[0058] A component material:

[0059] 330N: 40

[0060] DL-2000 25

[0061] TX-2: 14.5

[0062] TCPP: 18

[0063] Triethylenediamine: 2.5

[0064] B component material:

[0065] 330N: 70

[0066] Pure MDI: 20

[0067] Liquefied MDI: 10

[0068] Phosphoric acid: 10ppm

[0069] Preparation of component A materials: Put the measured 330N, DL-2000, TX-2, TCPP, and triethylenediamine into the reaction kettle, stir at room temperature for 3-4 hours, and then fill the barrel.

[0070] Preparation of component B materials: put 330N based on the formula into the reaction kettle at room temperature, raise it to 80-100°C, stir, vacuumize and dehydrate and degas for 2-3 hours, cool down to 10-40°C and add the measured pure MDI and Liquefy MDI, react at 80-85°C for 2-3 hours, cool down to 10-40°C, add measured phosphoric acid, stir evenly, and pack into barrels.

[0071] When in use, mix components A and B evenly at a volume ratio of A:B=1:1, inject them into coal seam holes with...

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Abstract

The invention discloses a polyurethane reinforced plugging agent for coal beds, which consists of a component A and a component B, wherein the component A consists of a polyether glycol, a chain extender, a fire retardant and a catalyst; and the component B consists of a prepolymer of polyether glycol and isocyanate. The plugging agent can be used by uniformly mixing the component A and the component B in a volume ratio of 1:1, pouring the mixture into the coal beds and allowing the mixture to solidify. The component A and the component B reacts at normal temperature, so energy is saved and heating equipment is not required. The reaction speed is high, the reaction temperature is low, the fire resistance is high, the flowability is high, the adhesive property is high, waste gas, liquid and solid are avoided, and product quality is stable. The plugging agent is very suitable for reinforced plugging of coal beds in coal mines.

Description

technical field [0001] The invention provides a polyurethane reinforced plugging agent for coal seams and a preparation method thereof. Background technique [0002] With the improvement of coal mining technology, the rich gas in the coal seam can be extracted before coal mining and used for power generation. After the gas is extracted, the remaining holes often cause the gas to accumulate again. Cause spontaneous combustion and fire, and broken coal rocks can easily lead to landslides, which brings inconvenience to mining and reduces the safety factor. So far, domestic methods such as filling mortar are time-consuming, laborious, and difficult to construct, and cannot guarantee that the hidden danger of accidents can be truly eliminated. Contents of the invention [0003] The technical problem to be solved by the present invention is to provide a polyurethane reinforced plugging agent for coal seam and its preparation method, which has good fluidity and cohesiveness, and...

Claims

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Application Information

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IPC IPC(8): C08L75/08C08G18/66C08G18/48C08G18/32C08K5/521
Inventor 孙清峰栾森王琳琳孙杰李先伟
Owner SHANDONG INOV POLYURETHANE