Compound sand-suspending agent for slurry filling and preparation method and usage thereof

Abstract

The invention belongs to the field of coal field fire control engineering and the filling of gobs, abandoned roadways and collapse pits after geological disasters and the mining of coal mines and thelike, and particularly relates to a compound sand-suspending agent for slurry filling and a preparation method and usage thereof. The compound sand-suspending agent is prepared from the following components: 45 to 70 percent of bentonite (sodium-based), 25 to 40 percent of vegetable gum, 2 to 8 percent of cellulose, 0.3 to 3 percent of sodium polyacrylate, 0.3 to 3 percent of polyacrylamide, 0.05to 2 percent of sodium dodecylbenzene sulfonate, 0.5 to 2 percent of hydrous magnesium silicate, 0.2 to 1 percent of calcium hydroxide, 0.5 to 2 percent of calcium sulphate and 0.5 to 5 percent of sodium bicarbonate, and all the percentages are percentages by weight. The invention further discloses the preparation method and usage of the compound sand-suspending agent for slurry filling. The invention mainly achieves the objective that after sand-fly ash slurry filling material is mixed with water and a small amount of sand-suspending agent, long-distance pipeline or borehole transport is realized, the sand slurry is prevented from depositing to block a pipeline in the process of transport, and thereby the sand slurry smoothly arrives at a space to be filled and realizes fracture sealing,temperature decreasing and fire extinguishment, safety and high efficiency and fire zone reburning prevention.

Description

technical field [0001] The invention belongs to the fields of coalfield fire control engineering, geological disasters, goafs after mining of coal mines, waste roadways, and subsidence pits, and particularly relates to a composite suspending agent for grouting and its preparation and use methods. Background technique [0002] In addition to the similarities with previous geological disasters and goaf control in coal mines, the coalfield fire control project must also consider the prevention and control of gas, fire, water, high temperature and other disasters in the goaf, so the requirements for control methods and materials are higher. At present, loess, fly ash and other materials are used to make liquid mud, plus water glass, ammonium bicarbonate and other combinations, or sodium polyacrylate is used as a precedent for gelling agent, but there are high requirements for loess and fly ash during use, and cannot There are sandstones or particles with larger particle sizes, w...

AI Technical Summary

Problems solved by technology

However, the existing inventions are mainly used in the environment of materials with light specific gravity and small particle size of suspended particles, and the suspension capacity is limited. For sandy soil pulping, there are too many suspending agent usage, high cost, and suspension stability time. Short, lack of plugging, cooling, inerting, flame retardant and other comprehensive properties required for coal field fire prevention and extinguishing