Inorganic cured foam material for surface leaking stoppage of shallow buried coal seam mining area and preparation method of inorganic cured foam material

Abstract

The invention discloses an inorganic cured foam material for surface leaking stoppage of a shallow buried coal seam mining area and a preparation method of the inorganic cured foam material, which belong to the inorganic cured foam material and the preparation method thereof. The leaking-stoppage cured foam comprises water, coal ash, slaked lime, cement, ox horn powder, aluminum powder, copper oxide, polyphosphoric acid, aluminum hydroxide, hydroxypropyl methyl cellulose and steel fiber. The preparation method of the inorganic cured foam material comprises the following steps of: firstly, adding the coal ash, the cement, the hydroxypropyl methyl cellulose, the steel fiber and the slaked lime in water to form a coal ash substrate serous fluid; secondly, adding the ox horn powder into a little water for stirring to form prefabricated mucus, and sufficiently stirring the coal ash substrate serious fluid and the prefabricated mucus to form a mixed solution; thirdly, adding an inorganic adhesive system into the mixed solution and sufficiently stirring to form a mixed adhesive solution; and finally, adding the aluminum powder for sufficiently stirring uniformly, foaming the serious fluid by utilizing an organic self-foaming system, and preparing the inorganic cured foam material for surface leaking stoppage of the shallow buried coal seam mining area. According to the invention, the seam infiltration capacity is strong, the compressive strength is large, the high temperature resistance and the heat insulation performance are good, and the substrate is purely inorganic and pollution-free.

Description

technical field [0001] The invention relates to an inorganic solidified foam material and a preparation method, in particular to an inorganic solidified foam material and a preparation method for plugging leaks on the surface of a shallow coal seam mining area. Background technique [0002] Spontaneous coal combustion is one of the most important disasters faced by my country's coal mine safety production, which seriously threatens the safety of underground workers and the normal mining of working faces, resulting in significant economic losses. In recent years, the focus of my country's energy strategy has shifted to the west, and coal seams in shallow-buried mining areas in the west are prone to spontaneous combustion, buried shallow (generally at a depth of 30-250m), and have serious air leakage from surface fissures. To prevent air leakage from surface fissures, on the basis of obtaining the law of air leakage from fissures, it is one of the most effective means to preven...

AI Technical Summary

Problems solved by technology

However, these technologies have some shortcomings: large-area surface backfilling can only initially fill up the obvious large cracks, which consumes a lot of manpower and material resources; during the grouting process, the grout leaks along the cracks to the underground working face and roadway, and the effect is poor; ammonium salt gel At room temperature, it will decompose and produce ammonia gas, which seriously pollutes the environment of mining areas; polymer gels are expensive and easy to crack; polyurethane foam is easy to burn at high temperatures and high in cost; light paste materials have general compressive strength and are easy to Small cracks are generated; high water sealing materials have good permeability and can penetrate deep into the coal gap, but the compressive strength is not high, and the thermal stability of organic components is poor