Hard organic framework filling material and preparation method thereof

Abstract

The invention discloses a hard organic framework filling material and a preparation method thereof.The material is prepared by mixing an organic framework material, a foaming material, an inorganic filling material, a surfactant, a retarder and an activating agent, and the weight ratio of the organic framework material to the foaming material is 1: 2.7-4.0; wherein the volume ratio of the mixtureof the organic framework material and the foaming material to the inorganic filling material is 1: (0.3-0.8), the content of the surfactant is 0.001-0.003% of the total weight of the hard organic framework filling material, the content of the retarder is 0.002-0.004% of the total weight of the hard organic framework filling material, and the content of the activator is 0.002-0.005% of the total weight of the hard organic framework filling material. The organic hard framework material is simple in structure, safe and environmentally friendly, and has good expansion performance, mechanical performance, excellent water permeability, cementing performance, super-long durability and stability.

Description

technical field [0001] The invention relates to the technical field of geological disaster prevention engineering, in particular to a hard organic framework filling material and a preparation method thereof. Background technique [0002] Karst landforms are widely distributed in my country, and the distribution area of ​​karst areas in the country is about 1.3 million km 2 , the most prominent areas are Guangxi, Guangdong, Yunnan, Guizhou, Sichuan, Hubei, Hunan, etc., and the distribution area accounts for about 1 / 2 of the national distribution area. In the karst area, the lithology is carbonate, which is prone to dissolution to cause damage to the rock mass structure, resulting in a large number of underground runoff channels such as caves, fissures, and underground rivers. In the karst area, the surface water system is generally not developed, and the groundwater resources are abundant. Due to the years of groundwater runoff, the erosion effect will cause the underground ...

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Problems solved by technology

Chinese patent publication number is the invention patent of CN109809830A, discloses a kind of foam filling material containing modified magnesium powder and its preparation method, has adopted raw materials such as cement, fly ash, blowing agent modified magnesium powder, etc., this invention institute The prepared foamed filling material containing modified magnesium powder can overcome the large amount of exothermic problem caused by the rapid reaction of the material, but its strength is low and its permeability is poor, which cannot meet the technical requirements for the support strength of filling materials in karst areas. There are defects in the filling works of

Chinese Patent Publication No. CN108439910A is an invention patent, which discloses a filling material with early strength and weak expansion and its filling method. The filling material of this invention is prepared from a matrix component and an external component. Material, gelling material, water, external components include foaming agent, foam stabilizer, retarder, this kind of material is mainly used in mine mining roadway filling, goaf roof support, to prevent the roof from collapsing, the The inventive expansive filling material has the characteristics of good fluidity, long initial setting time, high early strength, and weak expansibility. However, due to the long initial setting time, it is affected by groundwater runoff in the filling project of treating karst areas. Larger, resulting in serious material loss, so it cannot be promoted and used

[0006] To sum up, the traditional filling materials for underground holes in karst areas have many shortcomings such as high cost, poor permeability, easy loss, poor corrosion resistance, and damage to groundwater runoff. They cannot effectively prevent the occurrence of ground subsidence disasters, and are not conducive to popularization and application.

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