Suspension inhibitor for preventing and controlling coal mine spontaneous combustion and application thereof

Abstract

The invention relates to a suspension inhibitor for preventing and controlling coal mine spontaneous combustion. The suspension inhibitor is prepared from 5 to 25 percent of ultra-high molecular weight sodium polyacrylate, 55 to 85 percent of inorganic suspension inhibitors, 5 to 20 percent of activating agents and 1 to 2.5 percent of penetrating agents through blending. The suspension inhibitor is added into water to be prepared into a water suspension; then, hilly sand or pulverized fuel ash is added to be prepared into a fire preventing and extinguishing inhibitor; the suspension inhibitor,the hilly sand (the pulverized fuel ash) and the water can be chelated to form a three-dimensional reticular structure; hilly sand (pulverized fuel ash) particles with great density are wrapped in the reticular structure, so that the suspension time is long; and the problems of hilly sand (pulverized fuel ash) settling, pipeline blockage and short water holding time of the fire preventing and extinguishing inhibitor are solved.

Description

technical field [0001] The invention belongs to the technical field of flame retardancy in coal mines, and relates to a chemical inhibitor for preventing spontaneous combustion in coal mines. The inhibitor of the invention can well suspend mountain sand or fly ash to prevent and prevent coal mine spontaneous combustion. Background technique [0002] Coal mine fires are mostly caused by spontaneous combustion of coal. In the process of coal mining and transportation, due to mechanical vibration, wind and other factors, there will be gaps in the coal seam to infiltrate air, and a lot of fine coal dust will fall on the wall of the coal roadway. Coal absorbs oxygen in the air and oxidizes, which will generate a certain amount of heat. If the heat cannot be dissipated in time, as the oxidation progresses, the heat will accumulate more and further intensify the oxidation, and the coal temperature will become higher and higher. When the coal When the temperature reaches the ignit...

AI Technical Summary

Problems solved by technology

First of all, the cement mortar is easy to crack after drying, and the sealing effect is reduced, so the cement mortar needs to be sprayed again

Repeatedly spraying too thick cement mortar will easily cause the whole sprayed layer to fall off.

The second is that the cement mortar has a large proportion and is easy to settle. It is easy to cause pipeline blockage during the spraying process with a grouting pump. The cement mortar that is left in the pipeline after spraying is more likely to block the pipeline

But it cannot fundamentally solve the problems of cement mortar, especially the problem of pipeline blockage is still serious