Thin spraying material for reinforcement and dust sticking of roadway and preparation method

Abstract

The invention discloses a thin spraying material for reinforcement and dust sticking of a roadway and a preparation method. The thin spraying material comprises 5% to 10% of sodium carboxymethylcellulose, 10% to 15% of acrylic acid, 20% to 25% of polyaluminum chloride, 0.05% to 0.1% of an initiator, 0.01% to 0.05% of hydrochloric acid, 0.01% to 0.05% of an initiator, 0.01% to 0.05% of a cross-linking agent and the balance of water. The sodium carboxymethylcellulose is used as a matrix, reacts with the acrylic acid by grafting modification to form an intermediate product, and then a strong spraying material is prepared from the intermediate product and the polyaluminum chloride under the coordinating chelating action; and when the thin spraying material is sprayed to concrete and the surface of an anchor net, the thin spraying material can take effects of carrying out secondary reinforcement on surrounding rocks and preventing air leakage of the roadway, supporting intensity of the roadway can be greatly improved and a great volume of dust carried in wind flow can be greatly stuck.

Description

technical field [0001] The invention relates to the field of mine dust prevention, in particular to a thin spray material and a preparation method for reinforcing sticky dust in roadways. Background technique [0002] Due to the special environment of mines such as high stress, high temperature, high humidity, and continuous wind supply, the surrounding rock of the roadway is very prone to weathering, thereby reducing the support strength. After anchor net support, concrete or mortar will be sprayed for airtight isolation, but the sprayed concrete and mortar will peel off and open in a large area, which poses a serious threat to the stability of the roadway, greatly reduces the service life of the roadway, and brings safety to production. Hidden danger. The roadway will increase the support strength by means of local grouting and spraying cement slurry, but there are disadvantages of high labor intensity and many materials and consumables. [0003] In addition, during unde...

AI Technical Summary

Problems solved by technology

[0002] Due to the special environment of mines such as high stress, high temperature, high humidity, and continuous wind supply, the surrounding rock of the roadway is very prone to weathering, thereby reducing the support strength

After anchor net support, concrete or mortar will be sprayed for airtight isolation, but the sprayed concrete and mortar will peel off and open in a large area, which poses a serious threat to the stability of the roadway, greatly reduces the service life of the roadway, and brings safety to production. Hidden danger

The roadway will increase the support strength through local grouting, spraying cement slurry and other means, but there are disadvantages of high labor intensity and many materials and consumables

[0003] In addition, during underground ventilation, in addition to the air flow itself carrying a certain amount of dust, it will also cause secondary dusting of deposited dust, and the dust-laden air flow will enter the mining operation area, seriously threatening the occupational health of miners

Therefore, methods such as spreading rock powder, cleaning and flushing, and roadway brushing are generally used to prevent floating dust from flying, but the disadvantages are large water consumption, harsh operating environment, and great manpower and material resources.

However, the technical means of preparing reinforced sticky dust thin-sprayed materials based on the graft copolymerization method of sodium carboxymethyl cellulose-polyaluminum chloride has not been reported yet.

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