A kind of ultra-high water inorganic cement filling and fire prevention material

Abstract

The invention discloses a super high-water inorganic cementing filling and fire prevention and extinguishing material, which consists of a material A and a material B. The material A comprises, by weight, 60-75% of sulphoaluminate cement, 10-20% of calcium sulfate, 2-6% of calcium oxide, 2-5% of sodium sulfate, 2-6% of attapulgite, 2%-5% of silica fume, 1-2% of calcium formate, and 2-5% of calcium chloride. The material B comprises, by weight, 10-20% of sodium aluminate, 30-40% of sodium carbonate, 20-30% of calcium oxide, and 20-30% of calcium sulfate. The super high-water inorganic cementing filling and fire prevention and extinguishing material provided by the invention is applicable to underground coal mine filling and fire prevention and extinguishing, has the characteristics of small dosage, high water-cement ratio, good pumping fluidity, short initial setting time, low reaction heat release, good bearing compactness and high consolidation strength, and also has the advantages of safety and environmental protection, wide source of raw materials, and low cost.

Description

technical field [0001] The invention relates to a coal mine fire prevention and mine filling material, in particular to an ultra-high water inorganic cemented filling and fire prevention material. Background technique [0002] High-water materials are composed of material A and material B. Usually, material A is composed of cement, retarder and suspending agent, and material B is composed of quick-setting agent, suspending agent and other components. When using material A, slurry It can be poured after mixing with B material slurry. Compared with other materials, high-water materials have the characteristics of high water content, fast coagulation speed, and high strength of consolidated bodies. Coal seam fire area fire prevention and other aspects. High-water materials have good performance, low cost, and a wide range of uses, so they have broad application prospects in mines. [0003] The existing high water materials generally have the following problems: [0004] (1)...

AI Technical Summary

Problems solved by technology

The lower the water-cement ratio of high-water materials, the worse the fluidity and pumpability in the pipeline, and it is prone to pipe plugging. reach fire range

A low water-cement ratio will also lead to a large amount of high-water materials and an increase in the cost of the process, which is not conducive to reducing the economic cost of the mine

[0006] (3) The initial setting time of existing high-water materials under low water-cement ratio conditions is mostly 12-50 minutes. Under high water-cement ratio conditions, the setting time will be longer, which is not conducive to rapid filling and rapid coverage of coal mine fire areas cemented

At present, some high-water materials increase the water-cement ratio by adding some highly water-absorbing organic materials, but the water-fixing rate of the inorganic reaction is low, resulting in high reaction heat release, which is not conducive to filling and fire prevention in places prone to spontaneous combustion.

[0007] (4) The pressure-bearing compactness of the existing high-water materials is not good. When it is used to fill the leak plugging and isolate the fire area in the goaf, when the high-water materials are subjected to a certain pressure, cracks will appear, forming new air leakage channels. Poor compaction