A kind of inorganic filling sealing material for coal rock mass

Abstract

The invention provides an inorganic filling and sealing material for coal and rock mass. The inorganic filling sealing material for coal and rock mass is an inorganic powder material, and the sealing material for coal rock mass filling that is used on site can be obtained by adding water with 40-60% of the total mass of the inorganic powder material and mixing and stirring evenly. . Every 100 parts by weight of inorganic filling and sealing materials for coal and rock mass consists of 36.8-69.1 parts by weight of cement, 6.7-15.9 parts by weight of early strength agent, 1.2-3.2 parts by weight of foaming agent, 2.5-21.6 parts by weight of water reducing agent, 8.7-18.1 parts by weight It consists of an accelerator in parts by weight and a foam stabilizer in parts by weight of 6.4-9.8 parts. The inorganic filling airtight material for coal and rock mass of the present invention has the advantages of rapid strength growth, no cracking, strong sealing performance, non-toxic and pollution-free, flame retardant and safe, high expansion multiple and strong permeability; especially the expansion multiple is as high as 10 times or more , fast response, is an excellent sealing material for coal and rock mass filling.

Description

technical field [0001] The invention relates to an inorganic filling and sealing material for coal and rock mass, in particular, it belongs to a mining sealing material. Background technique [0002] Toxic and harmful gases, high-temperature flames, and shock waves formed by gas explosions caused by gas overruns not only cause a large number of casualties, but also destroy facilities such as wells and lanes. The most effective measure to control gas overrun is to carry out gas drainage. There are many technologies for gas drainage, such as floor-through-layer drilling gas drainage technology, high-level gas drainage roadway drainage technology, and high-level drilling gas drainage technology, etc., but various gas drainage technologies are used in high gas and outburst mines. In the end, a large number of drilling sites were left behind. If these drilling sites are not filled, it is easy to cause gas accumulation and coal spontaneous combustion, posing a safety hazard. The...

AI Technical Summary

Problems solved by technology

[0004] For underground hole filling, upper and lower corner sealing, gas-proof airtight wall filling and other needs, traditional technologies generally have problems such as low efficiency, labor and time-consuming, etc.

The commonly used filling methods are: cement slurry filling, wooden pile filling, coal filling, organic material filling and gel filling, etc. Cement slurry filling is widely used and has good effect, but the construction period is long and labor-intensive; while wooden pile filling and coal filling Filling also has shortcomings such as poor filling and waste of energy; gel and organic materials have a short filling period and are expensive, and the materials themselves are flammable and have a large reaction heat, so they should be used with caution

[0005] Although the new phenolic polymer foam filling materials on the market can solve the problem better, their high material price and uneconomical use cost limit their wide application.