Cement-based pollutant-blocking grouting material and preparation method thereof

Abstract

The invention belongs to the fields of grouting technology of mines and underground sewage treatment, and provides a cement-based pollutant-blocking grouting material and a preparation method thereof. The cement-based pollutant-blocking grouting material comprises 40-50% of cement, 32-40% of water, 2-5% of calcium oxide, 10-15% of an active filler, 1-2% of gas-forming coated particles, 8-13% of sodium silicate, 1-2% of basalt fibers, 0.5-1% of guar gum, and 0.1-0.5% of sodium dodecyl sulfate, wherein the gas-forming coated particles are aluminum powder particles with kerosene isolating layers, and the active filler is selected from zero-valent iron, magnetite and activated carbon. The material can be used for reinforcing a roadway and inhibiting diffusion of underground pollutants in a mining area at the same time; the material can be injected into potential water passing channels around a mine in advance through a grouting technology; when the material reaches a designated place, dense fine bubbles can be rapidly generated in the material, the whole slurry is rapidly hydrated and expanded, and strength is obtained; and after mining is finished, the level of underground water rises to carry pollutants in a mining area into the underground water, and the material can block migration of the pollutants through a large specific surface area of a porous structure and active substances contained in the material.

Description

technical field [0001] The invention relates to the fields of mine grouting technology and underground sewage treatment, in particular to a cement-based pollutant blocking grouting material and a preparation method. Background technique [0002] The information disclosed in this background section is only intended to increase the understanding of the general background of the present invention, and is not necessarily taken as an acknowledgment or any form of suggestion that the information constitutes the prior art already known to those skilled in the art. [0003] At present, with the widespread use of clean energy in our country, the use of fossil energy is gradually restricted, especially coal resources. In the process of coal development, it is inevitable to excavate mine roadways, and the comprehensive management of mine roadways is of great significance in the fields of land development and environmental protection. How to prevent the internal residual pollutants fro...

AI Technical Summary

Problems solved by technology

It is not difficult to see that it uses a large number of natural porous structure minerals, but with the increasing scarcity of natural minerals, its application is also limited

Similarly, the application range of the reaction wall is only suitable for relatively shallow pollution plumes, and cannot prevent and treat deep groundwater pollution in a targeted manner.

[0008] Although the above-mentioned mine sewage treatment materials have solved the problem of purifying sewage by adding active materials, they have not mentioned the prevention and treatment of the diffusion of deep-seated pollution sources in mines in practical applications.