Modified urea-formaldehyde resin reinforced material used for coal mine and preparation method thereof

Abstract

The invention belongs to the field of chemical synthesis, specifically relates to a modified urea-formaldehyde resin reinforced material used for coal mine and a preparation method thereof, and the material is applicable to fragmented coal body reinforcing during coal mine excavation. The modified urea-formaldehyde resin reinforced material is characterized by being composed of a composition A and a composition B, wherein the composition A is modified urea-formaldehyde resin and the composition B is a modified urea-formaldehyde resin curing agent composition. The characteristics comprise that: (1) by designing the formula of the material, the reaction is performed at normal temperature, the curing speed is adjustable, the consolidation body is high in strength and good in toughness, has the compression resistance of 30 mPa or more, and is capable of substantially improving the bracing force of loose coal; (2) the internal reaction temperature of the material is relatively low and is at 60 DEG C or less; (3) the raw material solution is low in viscosity, good in permeability in coal rocks, and the caking property between the consolidation body and the coal body is good; and (4) the material employs a special pneumatic double-liquid or three-liquid grouting pump for pressure grouting, the operation is simple and the usage is convenient.

Description

technical field

[0001] The invention belongs to the field of chemical synthesis, and in particular relates to a modified urea-formaldehyde resin reinforcement material for coal mines and a preparation method thereof. It is suitable for the reinforcement of broken coal in the process of coal mining. Background technique

[0002] In the process of mining in coal mines, it is inevitable to encounter loose and broken coal bodies with low strength and poor stability. During the excavation process, roof caving easily occurs. In order to ensure the safety and smoothness of mining and excavation, it is necessary to treat loose and broken coal The body is effectively reinforced.

[0003] At present, polyurethane grouting materials are mainly used for reinforcement of loose coal bodies, but the price of polyurethane materials is relatively high. The danger of fire, and the internal reaction temperature of urea-formaldehyde resin material is lower than 60 ℃, and the use of urea-forma...

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