Early-strength mining sealing material

Abstract

The invention discloses an early-strength mining sealing material, which comprises the following components in parts by weight: 1-5 parts of hydrotalcite early-strength components, 0.1-0.6 parts of organic early-strength components, and water-reducing components 0.1‑0.8 parts, 40‑45 parts of water, 95‑100 parts of cement. An early-strength mining sealing material proposed by the present invention has outstanding early-strength effect, the compressive strength of 1 day is as high as 14.58MPa, the compressive strength of 3 days is as high as 26.33MPa, and the setting time is less than 500min. The early strength of the material does not affect the requirements of its working performance, which fully meets the requirements of mine gas drainage and deep hole blasting.

Description

technical field [0001] The invention relates to the technical field of sealing materials, in particular to an early-strength mining sealing material suitable for drilling and sealing holes in coal mine gas drainage. Background technique [0002] Coal is the main energy source in our country. However, the mining process is often accompanied by various disasters and accidents. Gas outburst is the most prominent problem, which seriously restricts the safe mining of coal mines. Borehole drainage is the basic means of coal mine gas control. This technology needs to seal the hole after the hole is drilled. The sealing effect of the sealing material is particularly important, which seriously affects the gas drainage effect. [0003] At present, the measurement of coal seam gas pressure and the direct sealing technology of drainage drilling include the use of organic materials or inorganic materials for sealing, including artificial clay sealing, mechanical water injection mortar se...

AI Technical Summary

Problems solved by technology

Among them, the sealing length of the clay hole sealing method is relatively short, and the yellow mud will become soft when exposed to water, and the strength cannot meet the sealing requirements; the mechanical water injection mortar sealing cement has a slow setting speed, large volume self-shrinkage, and serious water separation, and The coal mine environment is complex and the mining depth is getting deeper and deeper. Due to the high temperature, high humidity and high corrosive environment in the mine, the early strength of the cement-based sealing material is far from meeting the requirements for coal seam permeability enhancement and gas drainage.

[0004] Chinese patent, CN107118560A discloses "A Preparation Method for Sealing and Filling Material for Coal Mine". Silicone resin and carbon black are treated, ball milled with sodium silicate, metakaolin, etc., and stirred with additives to obtain high expansion multiple, The sealing material with short setting time and good flame retardant performance has a good application effect, but the early strength is not strong enough, and the 7d compressive strength reaches 8.4MPa, which cannot meet the strength required for mine sealing

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