A lightweight filling material for mining

Abstract

The invention discloses a light filling material for mines. The filling material is prepared from components in parts by mass as follows: 65-85 parts of a base material, 10-15 parts of a coagulant, 1-5 parts of an excitant, 1-10 parts of an adjusting admixture, 0.1-1 part of a foaming agent and 0.1-1 part of a foam stabilizer. To meet the demands for upper corner filling and airtight wall construction, the light filling material has the characteristics of being light in weight, non-ignitable, small in density, adjustable in strength and setting time, excellent in expansibility and crushing resistance, free of obvious attenuation of water passing strength, environment-friendly, low in cost and the like and has remarkable effects on filling in a drilling site and upper corners of the mine, and the problems of gas accumulation and spontaneous combustion of coal can be effectively solved.

Description

technical field

[0001] The invention belongs to the field of mine filling materials, and in particular relates to a novel lightweight filling material used for fast filling underground of coal mines. Background technique

[0002] my country is rich in coal resources, with large and small coal fields all over the country. Coal is also the main energy source in my country at present, occupying a dominant position in the energy structure. There are many cavities in the underground of coal mines, such as drilling sites and upper corners of working faces, which are prone to gas accumulation. It is very necessary to study effective, economical and convenient filling materials to control the problem of gas accumulation in the upper corner of the drilling site and working face. For a long time, there have been many types of such filling materials at home and abroad, such as air foam, but due to the poor stability of the foam, the filling effect is not ideal; other such as organic f...

Examples

preparation example Construction

[0052] Another specific embodiment of the present invention discloses a method for preparing lightweight filling materials, the method comprising: mechanically mixing the base material, coagulant, activator, and coagulation regulator, adding an appropriate amount of water and mixing uniformly to obtain a slurry ; Add foaming agent and foam stabilizer to the above slurry and mix evenly, carry out grouting and coagulate to obtain light-weight filling material for mines.

[0053] In a preferred embodiment, the amount of water added is 0.5-5 times the mass sum of the base material, coagulant, activator, and coagulant regulator. More preferably, the amount of water added is the mass of the base material, coagulant, activator, and coagulant regulator. 0.5-2 times of the sum.

[0054] In addition, the present invention discloses the application of the above-mentioned light-weight filling material for mines, and the application includes being used in mine drilling sites, filling in up...

Embodiment 1

[0057] A lightweight filling material for mining, the components are calculated in parts by mass, 75 parts of sulfoaluminate cement, 15 parts of raw gypsum powder, 3 parts of calcium hydroxide, 3 parts of sodium gluconate, 5 parts of sodium carbonate, triterpene 0.5 part of saponin, 0.5 part of sodium lauryl sulfate, 0.5 part of calcium stearate, and 0.5 part of hydroxypropyl methylcellulose.

[0058] Mechanically mix sulfoaluminate cement, raw gypsum powder, calcium hydroxide, sodium gluconate, and sodium carbonate, add 100 parts of water (parts by mass) and stir rapidly at room temperature for 3 minutes, and mix uniformly to obtain a slurry; Alkyl sodium sulfate, calcium stearate, and hydroxypropyl methylcellulose are added to the above slurry and mixed evenly, pumped with a grouting pump, injected into the filling bag through a foaming mixer and condensed to obtain a lightweight filling material for mining .

Embodiment 2

[0060] A lightweight filling material for mines, the components are calculated in parts by mass, 75 parts of sulphoaluminate cement, 12 parts of desulfurized gypsum powder, 3 parts of calcium hydroxide, 3 parts of sodium gluconate, 3 parts of sodium carbonate, three parts 0.1 part of terpene saponin, 0.3 part of sodium lauryl sulfate, 0.2 part of calcium stearate, and 0.2 part of hydroxypropyl methylcellulose.

[0061] Mechanically mix sulfoaluminate cement, desulfurized gypsum powder, calcium hydroxide, sodium gluconate, and sodium carbonate, add 100 parts of water (parts by mass) and stir rapidly at room temperature for 3 minutes, and mix uniformly to obtain a slurry; Sodium dialkyl sulfate, calcium stearate, and hydroxypropyl methylcellulose are added to the above slurry and mixed evenly, pumped with a grouting pump, injected into the filling bag through a foaming mixer and condensed to obtain light filling for mine Material.

technical field

[0001] The invention belongs to the field of mine filling materials, and in particular relates to a novel lightweight filling material used for fast filling underground of coal mines. Background technique

[0002] my country is rich in coal resources, with large and small coal fields all over the country. Coal is also the main energy source in my country at present, occupying a dominant position in the energy structure. There are many cavities in the underground of coal mines, such as drilling sites and upper corners of working faces, which are prone to gas accumulation. It is very necessary to study effective, economical and convenient filling materials to control the problem of gas accumulation in the upper corner of the drilling site and working face. For a long time, there have been many types of such filling materials at home and abroad, such as air foam, but due to the poor stability of the foam, the filling effect is not ideal; other such as organic f...

Examples

preparation example Construction

[0052] Another specific embodiment of the present invention discloses a method for preparing lightweight filling materials, the method comprising: mechanically mixing the base material, coagulant, activator, and coagulation regulator, adding an appropriate amount of water and mixing uniformly to obtain a slurry ; Add foaming agent and foam stabilizer to the above slurry and mix evenly, carry out grouting and coagulate to obtain light-weight filling material for mines.

[0053] In a preferred embodiment, the amount of water added is 0.5-5 times the mass sum of the base material, coagulant, activator, and coagulant regulator. More preferably, the amount of water added is the mass of the base material, coagulant, activator, and coagulant regulator. 0.5-2 times of the sum.

[0054] In addition, the present invention discloses the application of the above-mentioned light-weight filling material for mines, and the application includes being used in mine drilling sites, filling in up...

Embodiment 1

[0057] A lightweight filling material for mining, the components are calculated in parts by mass, 75 parts of sulfoaluminate cement, 15 parts of raw gypsum powder, 3 parts of calcium hydroxide, 3 parts of sodium gluconate, 5 parts of sodium carbonate, triterpene 0.5 part of saponin, 0.5 part of sodium lauryl sulfate, 0.5 part of calcium stearate, and 0.5 part of hydroxypropyl methylcellulose.

[0058] Mechanically mix sulfoaluminate cement, raw gypsum powder, calcium hydroxide, sodium gluconate, and sodium carbonate, add 100 parts of water (parts by mass) and stir rapidly at room temperature for 3 minutes, and mix uniformly to obtain a slurry; Alkyl sodium sulfate, calcium stearate, and hydroxypropyl methylcellulose are added to the above slurry and mixed evenly, pumped with a grouting pump, injected into the filling bag through a foaming mixer and condensed to obtain a lightweight filling material for mining .

Embodiment 2

[0060] A lightweight filling material for mines, the components are calculated in parts by mass, 75 parts of sulphoaluminate cement, 12 parts of desulfurized gypsum powder, 3 parts of calcium hydroxide, 3 parts of sodium gluconate, 3 parts of sodium carbonate, three parts 0.1 part of terpene saponin, 0.3 part of sodium lauryl sulfate, 0.2 part of calcium stearate, and 0.2 part of hydroxypropyl methylcellulose.

[0061] Mechanically mix sulfoaluminate cement, desulfurized gypsum powder, calcium hydroxide, sodium gluconate, and sodium carbonate, add 100 parts of water (parts by mass) and stir rapidly at room temperature for 3 minutes, and mix uniformly to obtain a slurry; Sodium dialkyl sulfate, calcium stearate, and hydroxypropyl methylcellulose are added to the above slurry and mixed evenly, pumped with a grouting pump, injected into the filling bag through a foaming mixer and condensed to obtain light filling for mine Material.

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