Composite spraying material and frame for downhole quick leaking stoppage and filling and implementing method thereof

A kind of spraying material and fast technology, applied in the direction of fireproof coating, conductive coating, drilling composition, etc., can solve the problems of high cost and large negative impact, and achieve the effect of flexible deformation, reducing air leakage rate and improving extraction efficiency

Inactive Publication Date: 2018-06-08
CHINA UNIV OF MINING & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a composite spraying material and sealing frame and its implementation method for downhole quick plugging and filling, so as to solve the problems that the existing materials are relatively expensive when used as a single product and have a relatively large negative impact in the application process

Method used

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  • Composite spraying material and frame for downhole quick leaking stoppage and filling and implementing method thereof
  • Composite spraying material and frame for downhole quick leaking stoppage and filling and implementing method thereof
  • Composite spraying material and frame for downhole quick leaking stoppage and filling and implementing method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0048] Example 1, with the improvement of the level of comprehensive mechanized mining, more and more working faces are mined without coal pillars. During the process of roadway formation with roof cutting and goaf retention, relatively large cracks are likely to occur between the roof and floor of the roadway, resulting in mining A large amount of air leakage in the goaf has created conditions for the spontaneous combustion of coal left in the goaf. Therefore, the use of a sealed skeleton structure to connect the roadway retention with the roof and floor, followed by spraying composite polymer materials, can effectively block the air leakage and greatly improve the utilization rate of the sprayed materials, so that the material and the original roadway wall form a whole that is isolated from air leakage. It can effectively maintain the sealing performance of the gap between the roof and floor of the roadway under the influence of the tunnel.

Embodiment 2

[0049] Example 2, during the mining process of the working face, due to factors such as the lithology characteristics of the roof and periodic pressure, it is easy to cause large-scale collapse of the roof of the working face, and the formed roof triangular space provides a place for gas accumulation, resulting in a gas explosion hidden dangers. Therefore, a sealed frame is used to connect the tops of several supports to form a base of composite polymer materials, and a large amount of filling and injection is performed to fill the empty top area. The mixed material penetrates into the interior of the broken coal and rock mass and foams through chemical reactions. , the volume expands, generating additional pressure, further pressing the uncured foam into smaller cracks, and binding the broken and loose rocks together. The construction material has good adhesion and certain compression resistance, which ensures the safe mining of the working face. Such as Figure 5 shown.

Embodiment 3

[0050] Example 3, during the mining process of the working face, due to the gaps between the supports, under the action of the pressure difference between the upper and lower corners, the air leakage of the working face gushes out at the upper corner, which may easily cause the gas in the upper corner of the working face to exceed the limit. At the same time, a large amount of air leakage at the working face has also created good conditions for the spontaneous combustion of residual coal in the goaf, causing major accident hazards. Wind curtains and partition walls at the end of the trough were used to reduce the air leakage of the working face, but the effect was not good. Therefore, at the rear of the hydraulic support in the upper and lower corner sections, a sealed frame is used to connect them into one body, and composite polymer materials are used for spraying to form a good windshield wall. In view of the advantages of the material's shear resistance, light weight and go...

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PUM

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Abstract

The invention discloses a composite spraying material and frame for downhole quick leaking stoppage and filling and an implementing method thereof, and belongs to the composite spraying material and the sealing frame, and the implementing method thereof. A set reasonable proportion of phenolic foam, polyurethane foam and urea formaldehyde foam is selected, a base material of the spraying materialis synthesized, a proper flame retardant is added, and the properties of the base material are increased; an antistatic material, a catalyst, a curing agent, a surfactant, a foaming agent and other materials are added, and the flame-retardant and anti-static composite macromolecular spraying material is formed through specific technological process. Fiber-Kevlar is selected as a raw material to form the sealing frame and is used as a carrier of the spraying material, the structure deformation is flexible, and a whole for quick sealing and leaking stoppage is formed jointly. Through different embodiments, the composite spraying material is verified to have the characteristics of light mass, fast forming, strong sealing and good fire prevention and leaking stoppage effects, can effectively prevent downhole air leakage and harmful gas gushing and ensures the safety of workers.

Description

technical field [0001] The invention relates to a composite spraying material, a sealing frame and an implementation method thereof, in particular to a composite spraying material, a sealing frame and an implementation method thereof for fast downhole plugging and filling. Background technique [0002] With the gradual increase of coal mining depth, the improvement of comprehensive mechanization, and the construction of high-yield and efficient working faces, the risk of gas management in the corners of the working face is getting higher and higher, and efficient management is becoming more and more difficult, which seriously restricts the safe and efficient production of coal mines. Mine air leakage will cause additional consumption of power, reduce the effective air volume (air volume delivered to the place where the wind is used) of the mine, mining area and working face, cause gas accumulation, temperature rise, etc., affecting safe production and workers' health. A larg...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D161/34C08G14/08C09D5/18C09D5/24C09K8/42C09K8/44
CPCC08G14/08C08K5/521C09D5/18C09D5/24C09D161/34C09K8/426C09K8/44Y02P20/141
Inventor 王凯奚弦蒋曙光崔传波丁超南吴征艳张卫清邵昊
Owner CHINA UNIV OF MINING & TECH
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