A coal gangue-based geopolymer grouting material and its preparation method

Abstract

The invention discloses a coal gangue-based geological polymer grouting material and a preparation method thereof, belonging to the field of rock mass fissure grouting engineering. The grouting material includes the following components by weight: 80-85 parts of coal gangue powder, 6-10 parts of slag powder, 3-7 parts of fly ash, 1-4 parts of alkaline activator, 0.3-1 part of surface active agent, 1-2 parts retarder, 0.8-1.2 parts water retaining agent. The present invention satisfies the pressure of high-pressure limestone deep in coal mines and pressure-bearing water in fissures, and utilizes coal gangue, slag powder and fly ash as raw materials for industrial solid wastes, which are low in price and meets the requirements of grouting. While the technical performance of the material is required, the cost is low. The grouting material can be used for water prevention and control in the production process of coal mines, effectively reducing the cost of grouting, improving enterprise benefits, and reducing the risk of land pollution.

Description

A kind of gangue-based geopolymer grouting material and preparation method thereof technical field The invention belongs to the field of rock mass fissure grouting engineering, in particular to a kind of gangue-based geopolymer grouting material and its preparation method. Background technique Coal gangue is the rock sandwiched in the coal measure strata, and is a kind of solid waste discharged in the coal mine production process. It is a kind of black, gray-black rock with lower carbon content and higher hardness than coal associated with coal seam during coal formation. The lithology of coal gangue is mostly mudstone, sandy mudstone, sandstone, siltstone, limestone and other sedimentary rocks. [0003] Due to the complexity of geological conditions, various engineering geological disasters occur frequently. Among them, the water-rich broken rock mass is an extremely Common adverse geological conditions, water-rich broken rock mass has the characteristics of poor c...

AI Technical Summary

Problems solved by technology

[0005] Coal gangue is the largest industrial waste in my country. Because of its stable structure and poor activity, its overall utilization has not been large for a long time, and its comprehensive utilization rate is not high.