Fly ash-based grouting filler for mine

Abstract

The invention provides a fly ash substrate grouting filling material used by a mine, which consists of the raw materials with the following mass percent: 40-80 percent of fly ash, 10-50 percent of cement, 5-18 percent of lime and the rest of admixtures. The invention adopts the fly ash as the main material and the cement and the lime as the accessories. By adding one or a plurality of additives including sulfate, carbonate, alkali, villaumite and a water reducing agent, the fly ash substrate grouting filling material effectively activates the activity of the fly ash, effectively improves the strength of the grouting stone body, and enhances the stability of the slurry, thus not only lowering the construction cost, but also protecting the environment. Compared with the currently applied grouting filling technology, the fly ash substrate grouting filling material has better compatibility and more convenient construction management, thus being applicable to various grouting filling solidification projects of the mine.

Description

technical field [0001] The invention relates to a grouting filling material, in particular to a fly ash grouting filling material for mines, and belongs to the technical field of grouting materials for underground buildings. Background technique [0002] With the development of society and economy, the human demand for mineral resources is increasing. With the large-scale development and utilization of mineral resources, the depth of mine mining in my country is deepening year by year, and a huge underground rock mass engineering system has been formed in the process of mine mining. Its stability is related to mine construction, production design, construction, construction investment, and production. There is a very close relationship between cost and comprehensive utilization of mineral resources. Therefore, the stability of mine rock mass has attracted more and more attention. At present, grouting reinforcement technology is mainly used to maintain the stability of mine ...

AI Technical Summary

Problems solved by technology

However, cement slurry also has the following disadvantages: high water separation rate, poor stability and groutability, long gelation time, especially in the case of high groundwater flow rate, the slurry is easy to be washed and diluted, thus affecting the grouting effect

However, the application of fly ash in grouting engineering is not much, mainly because the activity of fly ash is low, which can easily cause the early strength to be too low, which cannot meet the requirements of grouting filling engineering.