A kind of gas-containing coal similar material and preparation method thereof

Abstract

The invention discloses a gas-containing coal similar material and a preparation method thereof. The similar material is prepared by the preparation method comprising the following steps: selecting coal powder with certain particle size distribution and a sodium humate aqueous solution as raw materials, wherein the coal powder is used as an aggregate and the sodium humate aqueous solution is used as a cementing agent; weighing the coal powder with the certain particle size distribution, water and sodium humate strictly according to proportions, fully stirring uniformly, pouring the well mixed and stirred mixture into a steel mold, and performing pressure molding on the mixture by using a certain pressure under a press machine; and separating the mold, taking out a molded test piece, and drying at normal temperature or in a drying box. A physical mechanical parameter test shows that the volume weight and porosity of the similar material are equivalent to those of raw coals, the adsorptivity of the similar material is very close to that of the raw coals, and the similar material has the advantages of high uniaxial compressive strength, wide mechanical parameter variation range and the like, and also has the advantages of simple material manufacturing process, stable performance, low price, no toxic or side effect and the like.

Description

technical field [0001] The invention relates to a gas-containing coal-like material and a preparation method thereof. Background technique [0002] Coal is the main energy source that has dominated my country for a long time. In the primary energy consumption structure, coal accounts for about 70%. my country's energy structure is still dominated by coal for a long time. During the "Twelfth Five-Year Plan" period, my country's coal demand will still be on the rise. It is estimated that by 2015, my country's coal demand will reach 3.8 billion tons. my country is one of the countries with the most serious coal and gas outburst disasters in the world. With the increase of mining intensity and the deepening of mining depth, the risk of coal and gas outburst increases accordingly, and the number of coal and gas outburst dangerous mines is increasing rapidly. Increase. The mining depth of 43 pairs of mines in the central and eastern mining areas of my country has reached 1000m, a...

AI Technical Summary

Problems solved by technology

[0005] The above similar materials have the following disadvantages: the bulk density and porosity of the material are quite different from those of raw coal; the adsorption effect of the material is poor; the strength of the material is low, and the range of mechanical parameters is narrow.

[0015] Existing similar materials and their preparation methods cannot meet the above requirements at the same time

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