High-strength and corrosion-resistant wet spraying material for coal mine roadway and construction process of high-strength and corrosion-resistant wet spraying material

Abstract

The invention relates to the technical field of coal mine roadway material spraying. The invention particularly discloses a high-strength and corrosion-resistant wet spraying material for a coal mineroadway and a construction process thereof. The wet spraying material comprises a solid raw material and water; the ratio of the water to the solid raw material is 0.09-0.11; the solid raw material comprises 15%-30% of cement, 20%-40% of sand, 20%-30% of pebbles, 5%-10% of coal ash, 10%-15% of mineral powder, 5%-10% of silica fume, 0.5-1.5 kg/m < 3 > of hybrid fibers and 2%-20% of a cement additive. The hybrid fibers are two or more of steel fibers, glass fibers, carbon fibers or polypropylene fibers, and the lengths of different fibers are different. The spraying material obtained according to the proportion in the patent can still keep better strength when being used in an acidic corrosive environment of a coal mine roadway, and can meet the requirements of high stress, large deformationof soft rock, rock burst and high-corrosivity coal mine roadway support.

Description

technical field [0001] The invention relates to the technical field of spraying materials for coal mine roadways, in particular to a high-strength, corrosion-resistant tidal spraying material for coal mine roadways and a construction process thereof. Background technique [0002] At present, my country's coal resource mining has entered the stage of deep mining. One of the problems encountered at this stage is the difficulty in roadway maintenance caused by the increase in ground stress level. The surrounding rock of the roadway shows large deformation and impact damage under the action of high stress; At the same time, in some geological structure areas such as faults and folds, the structural stress and the self-gravity stress are superimposed, which intensifies the damage to the roadway. In the past ten years, the level of coal mining equipment has been greatly improved, and high-efficiency mining technologies such as large mining height fully mechanized mining and large m...

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Problems solved by technology

[0005] The invention provides a high-strength, corrosion-resistant tidal spraying material for coal mine roadways and its construction technology to solve the problem of low strength, poor corrosion resist

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