Inorganic quick-setting double-liquid grouting reinforcement material for mine

Abstract

According to the mineral inorganic quick-setting double-liquid grouting reinforcement material, nano silicon dioxide is added, higher pozzolanic activity is achieved, the microstructure of a cement-based material is improved by consuming C-H in a hydration product and generating more C-S-H, microdefects are reduced, and therefore the mechanical property and durability of the material are improved; most of hydration products can only grow on the surfaces of cement particles. The nano-material is high in activity, the surface of the nano-material can provide additional nucleation points for growth of hydration products and promote multi-point growth of the hydration products, the breaking strength and compressive strength of the concrete can be improved by adding the superfine limestone, and the effect of improving the early strength of the concrete is remarkable. In the early stage of grouting, the high-strength magnetic field is applied, so that aggregation and sedimentation of nano-particles can be prevented, nano-silicon dioxide can be injected into fine cracks more easily, collapse caused by sinking of stone bodies on the upper portion is prevented, and the anti-permeability and the water plugging effect are also improved.

Description

technical field [0001] The invention belongs to the technical field of grouting filling materials, and particularly relates to an inorganic quick-setting double-liquid grouting reinforcement material for mining. Background technique [0002] my country is a big energy country, and its coal consumption ranks first in the world. With the massive mining of coal, the shallow buried and deep coal seams have tended to be exhausted. Coal mining enterprises have to mine deep. In the future, the broken coal mine roadway has brought a threat to the safety of coal mine production, and grouting reinforcement is a powerful means to control the broken coal and rock mass of the roadway. In the past, polymer materials were mostly used for grouting. Although this material has good effect, it is expensive, and if it is used in large quantities, it will also cause high temperature, which will bring unstable factors to the safe production of coal mines. Therefore, inorganic grouting materials h...

AI Technical Summary

Problems solved by technology

In the past, polymer materials were mostly used for grouting. Although this material is effective, it is expensive, and it will cause high temperature when used in large quantities, which will bring unstable factors to the safe production of coal mines.