High-expansion gelling agent for plugging coal mine tunnel

Abstract

The invention discloses a high-expansion gelling agent for plugging a coal mine tunnel. The high-expansion gelling agent for plugging the coal mine tunnel comprises 40-50 wt% of calcium chloride, 20-30 wt% of calcium sulphoaluminate, 20-30 wt% of calcium aluminate, 0.2-0.5 wt% of spherical aluminum powder and 0.5-1 wt% of redispersible latex powder. The process is simple and advanced. The high-expansion gelling agent for plugging the coal mine tunnel only needs to be uniformly mixed with water and fly ash according to a certain ratio when used, the obtained mixture is conveyed to the filling area of a goaf, and devices used for underground filling are simple, and have a small quantity, a high efficiency and a high production capability. A slurry coagulates and fills without dehydrating, and the filled body has a good supporting performance; and the slurry can be prepared in a bottom surface intensive pulping manner or an underground onsite pulping manner, and the slurry has a good suspension property, and can be regarded as a homogeneous slurry during transportation, so pulping and conveying are convenient, and the slurry conveying quality can be guaranteed.

Description

technical field [0001] The invention belongs to coal mine filling and sealing materials, in particular to a high-expansion gelling agent for coal mine roadway sealing. Background technique [0002] In the field of coal mine fire area closure and goaf plugging technology, fire-proof filling materials are commonly used. Among them, traditional materials mainly include yellow mud, cement mortar, gangue mud, gypsum, gel, etc. New materials include Rock Hugh, Ma Lisan, Ruimi, Meigubao, three-phase foam, etc. These materials generally have disadvantages such as high cost, large volume shrinkage after dehydration, curing problems (unable to cure or long curing time, etc.), low curing strength, etc. In addition, polymer materials will release a lot of heat during the curing process, resulting in local temperature The rise will bring safety hazards to coal mines. In recent years, high water gelling agent mixed fly ash pouring technology has gradually been popularized and applied in...

AI Technical Summary

Problems solved by technology

In addition, the ratio of material A and material B also makes the construction process cumbersome and complicated

Images