Grouting and hole-sealing material used for drilling of underground coal mine gas

Abstract

The invention provides a grouting and hole-sealing material used for drilling of underground coal mine gas. The material comprises a dry grouting and hole-sealing material and water, wherein a weight ratio of the dry grouting and hole-sealing material to water is 1: 0.8-1.2; the dry grouting and hole-sealing material is composed of the following substances: Portland cement, fly ash, desulphurized gypsum, lime, aluminum powder paste, sodium chloride, metakaolin, and citric acid or sodium carbonate; and the substances composing the dry grouting-and-sealing material are required by weight as follows: 6 to 10 parts of the Portland cement, 0.5 to 3 parts of the fly ash, 0.5 to 3 parts of the desulfurized gypsum, 0.2 to 1 part of the lime, 0.0005 to 0.002 part of the aluminum powder paste, 0.05 to 0.15 part of the sodium chloride, 0.2 to 1.5 part of the metakaolin, and 0.0025 to 0.015 part of the citric acid or 0.005 to 0.03 part of the sodium carbonate. The grouting and hole-sealing material used fo drilling of underground coal mine gas provided by the invention has the advantages of adjustable coagulation time, improved air tightness of hole-sealing, improved hole-sealing efficiency and safety, lowered hole-sealing cost, simplified hole-sealing preparation work, etc.

Description

technical field

[0001] The invention relates to the field of coal seam gas drainage in coal mines, in particular to a grouting sealing material for gas drilling in coal mines. Background technique

[0002] Gas outburst has always been a major disaster that threatens the safe production of coal mines. Early gas drainage is one of the important means to effectively control gas outburst. At present, the sealing methods mainly include mechanical sealing method, casing sealing method, clay sealing method, cement mortar sealing method, polyurethane sealing method and so on. Among them, the performance of the sealing material directly affects the quality of the sealing. The commonly used sealing methods include the towel sleeve sealing method and the sealing bag sealing method. The essence is the same, that is, the polymer material sealing. The disadvantage of this type of hole sealing method is that the polymer foam material cannot fill the original cracks around the drilled hole...

Examples

preparation example Construction

[0037] The grouting sealing material is in the form of slurry, and the preparation method of the slurry comprises the following steps:

[0038] Step 1: mix 6-10 parts by weight of Portland cement, 0.5-3 parts by weight of fly ash, 0.5-3 parts by weight of desulfurized gypsum, 0.2-1 parts by weight of quicklime and 0.2-1.5 parts by weight of metakaolin Carry out mechanical grinding in a ball mill respectively, so that the particle size of each component is not greater than 2mm;

[0039]Step 2: Mix the ground components with 0.0005-0.002 parts by weight of aluminum paste, 0.05-0.15 parts by weight of sodium chloride, and 0.0025-0.015 parts by weight of citric acid or 0.005-0.03 parts by weight of sodium carbonate And mechanically stir evenly to obtain the dry material for grouting and sealing;

[0040] Step 3: Fully stir the grouting and sealing dry material and water for 15-30 minutes according to the weight ratio of 1:0.8-1.2, and the obtained slurry is the grouting and seali...

Embodiment 1

[0050] A grouting sealing material for underground gas drilling in coal mines, comprising grouting and sealing dry material and water, the weight ratio of the grouting and sealing dry material to water is 1:0.8; the grouting The material composition of the sealing dry material includes Portland cement, fly ash, desulfurized gypsum, quicklime, aluminum powder paste, sodium chloride, metakaolin, citric acid and sodium carbonate. The required parts by weight are: 6 parts of 42.5 grade Portland cement, 0.5 part of fly ash, 0.5 part of desulfurized gypsum, 0.2 part of quicklime, 0.0005 part of aluminum powder paste, 0.05 part of sodium chloride, 0.2 Parts of metakaolin and 0.0025 parts of citric acid.

[0051] The grouting sealing material is in the form of slurry, and the preparation method of the slurry comprises the following steps:

[0052] Step 1: Mechanically grind 6 parts by weight of 42.5 grade Portland cement, 0.5 parts by weight of fly ash, 0.5 parts by weight of desulfu...

Embodiment 2

[0056] A grouting sealing material for underground gas drilling in coal mines, comprising grouting and sealing dry material and water, the weight ratio of the grouting and sealing dry material to water is 1:0.9; the grouting The material composition of the sealing dry material includes Portland cement, fly ash, desulfurized gypsum, quicklime, aluminum powder paste, sodium chloride, metakaolin, citric acid and sodium carbonate. The required parts by weight are: 7 parts of 42.5 grade Portland cement, 1 part of fly ash, 1 part of desulfurized gypsum, 0.4 part of quicklime, 0.001 part of aluminum powder paste, 0.075 part of sodium chloride, 0.6 1 part of metakaolin and 0.01 part of citric acid.

[0057] The grouting sealing material is in the form of slurry, and the preparation method of the slurry comprises the following steps:

[0058] Step 1: Mechanically grind 7 parts by weight of 42.5 grade Portland cement, 1 part by weight of fly ash, 1 part by weight of desulfurized gypsum...

technical field

[0001] The invention relates to the field of coal seam gas drainage in coal mines, in particular to a grouting sealing material for gas drilling in coal mines. Background technique

[0002] Gas outburst has always been a major disaster that threatens the safe production of coal mines. Early gas drainage is one of the important means to effectively control gas outburst. At present, the sealing methods mainly include mechanical sealing method, casing sealing method, clay sealing method, cement mortar sealing method, polyurethane sealing method and so on. Among them, the performance of the sealing material directly affects the quality of the sealing. The commonly used sealing methods include the towel sleeve sealing method and the sealing bag sealing method. The essence is the same, that is, the polymer material sealing. The disadvantage of this type of hole sealing method is that the polymer foam material cannot fill the original cracks around the drilled hole...

Examples

preparation example Construction

[0037] The grouting sealing material is in the form of slurry, and the preparation method of the slurry comprises the following steps:

[0038] Step 1: mix 6-10 parts by weight of Portland cement, 0.5-3 parts by weight of fly ash, 0.5-3 parts by weight of desulfurized gypsum, 0.2-1 parts by weight of quicklime and 0.2-1.5 parts by weight of metakaolin Carry out mechanical grinding in a ball mill respectively, so that the particle size of each component is not greater than 2mm;

[0039]Step 2: Mix the ground components with 0.0005-0.002 parts by weight of aluminum paste, 0.05-0.15 parts by weight of sodium chloride, and 0.0025-0.015 parts by weight of citric acid or 0.005-0.03 parts by weight of sodium carbonate And mechanically stir evenly to obtain the dry material for grouting and sealing;

[0040] Step 3: Fully stir the grouting and sealing dry material and water for 15-30 minutes according to the weight ratio of 1:0.8-1.2, and the obtained slurry is the grouting and seali...

Embodiment 1

[0050] A grouting sealing material for underground gas drilling in coal mines, comprising grouting and sealing dry material and water, the weight ratio of the grouting and sealing dry material to water is 1:0.8; the grouting The material composition of the sealing dry material includes Portland cement, fly ash, desulfurized gypsum, quicklime, aluminum powder paste, sodium chloride, metakaolin, citric acid and sodium carbonate. The required parts by weight are: 6 parts of 42.5 grade Portland cement, 0.5 part of fly ash, 0.5 part of desulfurized gypsum, 0.2 part of quicklime, 0.0005 part of aluminum powder paste, 0.05 part of sodium chloride, 0.2 Parts of metakaolin and 0.0025 parts of citric acid.

[0051] The grouting sealing material is in the form of slurry, and the preparation method of the slurry comprises the following steps:

[0052] Step 1: Mechanically grind 6 parts by weight of 42.5 grade Portland cement, 0.5 parts by weight of fly ash, 0.5 parts by weight of desulfu...

Embodiment 2

[0056] A grouting sealing material for underground gas drilling in coal mines, comprising grouting and sealing dry material and water, the weight ratio of the grouting and sealing dry material to water is 1:0.9; the grouting The material composition of the sealing dry material includes Portland cement, fly ash, desulfurized gypsum, quicklime, aluminum powder paste, sodium chloride, metakaolin, citric acid and sodium carbonate. The required parts by weight are: 7 parts of 42.5 grade Portland cement, 1 part of fly ash, 1 part of desulfurized gypsum, 0.4 part of quicklime, 0.001 part of aluminum powder paste, 0.075 part of sodium chloride, 0.6 1 part of metakaolin and 0.01 part of citric acid.

[0057] The grouting sealing material is in the form of slurry, and the preparation method of the slurry comprises the following steps:

[0058] Step 1: Mechanically grind 7 parts by weight of 42.5 grade Portland cement, 1 part by weight of fly ash, 1 part by weight of desulfurized gypsum...