Preparation method and construction method of gas digesting agent

Abstract

The invention relates to the technical field of gas digesting agent preparation, and discloses a gas digesting agent composition method and a construction process, and the preparation method comprises the following steps: weighing a certain amount of kaolin, magnesium hydroxide, guar gum, carboxymethyl cellulose sodium, sodium dichloroisocyanurate and other components for treating gas; the components are mixed according to a certain ratio, water is added, and the mixture is fully stirred to complete the preparation. The construction method comprises the following steps: punching; a liquid injection pipe and a hole packer are lowered for hole sealing; and grouting. In the whole product construction process, a liquid permeation technology is adopted, the molecular weight is smaller than that of water, permeation of a coal seam, a coal seam and a coal body is facilitated, digestive fluid is sprayed or injected into the coal seam, a protective film is generated on the surface of the coal body, the effects of gas flow isolation and heating ignition are achieved, and gas explosion is prevented; meanwhile, the coating can be used for fire prevention and extinguishment of coal mines and reduction of high temperature of coal and rock layers, reburning is avoided, and the construction safety is fully improved.

Description

Technical Field

[0001] The invention relates to the technical field of gas digester preparation, and in particular to a preparation method and a construction method of a gas digester. Background Art

[0002] Coal mining is recognized as a high-risk industry in the world, so coal mine safety is the top priority of coal mining. There are five major natural disasters in coal mining, namely gas, roof, fire, water, and mine dust, especially gas accidents are the most terrible. Although the state has taken various measures for coal mines, gas accidents still occur from time to time and are difficult to prevent. Coal mine gas and fire accidents not only threaten the lives and safety of miners, but also cause huge losses to national energy and people's property. Therefore, gas control is particularly important.

[0003] At present, some mines mainly treat gas by extraction, discharge and power generation, but most of them have not reached the standard of radical treatment. The products on the market for coal mine fire prevention and control are mainly polymer foaming materials, inhibitors, and solid plugging materials for mining. These products have low fire extinguishing efficiency, large dosage, high cost, toxic and harmful, and are easy to reignite after extinguishing. They have single performance and cannot meet the standard of gas treatment. Summary of the invention

[0004] The purpose of the present invention is to solve the shortcomings of the prior art and to propose a preparation method and construction method of a gas digester.

[0005] In order to achieve the above object, the present invention adopts the following technical scheme: a method for preparing a gas digester, comprising at least the following steps:

[0006] S1-1 Weigh a certain amount of kaolin, magnesium hydroxide, guar gum, sodium hydroxymethyl cellulose, sodium dichloroisocyanurate and other components for gas treatment, and mix them in a certain proportion;

[0007] S2-1 Add water to the mixture obtained in S1 and stir thoroughly to complete the preparation;

[0008] Among them, the weighed kaolin is 75 parts to 85 parts, the magnesium hydroxide is 15 parts to 30 parts, the guar gum is 5 parts to 10 parts, the sodium hydroxymethyl cellulose is 3 parts to 5 parts, the sodium dichloroisocyanurate is 0.5 parts to 1 part, and the other gas treatment ingredients are 3 parts to 5 parts.

[0009] The fineness of kaolin is above 800 mesh.

[0010] A construction method of a gas digester comprises at least the following steps:

[0011] S2-1 Punching: Punch holes according to the design requirements;

[0012] S2-2 Liquid injection pipe and hole sealer: Connect three Φ50 PVC pipes, each 3 meters long, with threads, and insert them into the two bags of the bag-type hole sealer. Then put the hole sealer and PVC pipe into the drilled hole together;

[0013] S2-3 Sealing the hole: first connect the discharge port of the pneumatic grouting pump and the bag-type hole sealer with a quick connector;

[0014] S2-4 Add an appropriate amount of inorganic sealing material into the stirring device of the pneumatic grouting pump, and then add water to dilute it at a weight ratio of 1:0.8. After stirring evenly, start the pneumatic grouting pump. The inorganic sealing material is injected into the bag of the bag-type sealer. After the bag is filled and expanded, the pressure in the hole rises. When the pressure in the hole reaches the maximum pressure of the bursting valve of the sealer, the bursting valve bursts and starts to inject the gap between the two bags. After filling, the pressure gauge rises. When the pressure reaches the pressure set by the pressure-limiting valve of the pneumatic grouting pump, the grouting pump automatically stops working, and the grouting and sealing of the hole is completed.

[0015] The gas digester is mixed and stirred at a solid-liquid ratio of 1:20-30 to form a colloid;

[0016] When the pressure of the pneumatic grouting pump reaches 5MPa, stop injecting liquid and close the valve to allow the colloidal material to penetrate into the coal seam under pressure, lower the temperature of the coal seam, prevent spontaneous combustion of the coal seam, and reduce the gas concentration and content.

[0017] The diameter of the hole punched in S2-1 shall not be less than 133 mm;

[0018] In S2-2, the distance between the sealer and the bag does not exceed 5 meters, and 1 meter is exposed.

[0019] The present invention has the following beneficial effects:

[0020] In the present invention, the overall product construction process adopts liquid penetration technology, whose molecular weight is smaller than that of water, and is easy to penetrate coal seams, coal seams, and coal bodies. The digestion liquid is sprayed or injected into the coal seam to produce a protective film on the surface of the coal body, thereby isolating the flow of gas and heating and ignition, preventing gas explosions. At the same time, it can also be used for coal mine fire prevention and fire extinguishing, reducing the high temperature of coal rock layers, and no longer re-igniting, thereby fully improving construction safety. DETAILED DESCRIPTION

[0021] The technical solutions in the embodiments of the present invention are described clearly and completely. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0022] The present invention adopts the following technical scheme: a method for preparing a gas digester, comprising at least the following steps:

[0023] S1-1 Weigh a certain amount of kaolin, magnesium hydroxide, guar gum, sodium hydroxymethyl cellulose, sodium dichloroisocyanurate and other components for gas treatment, and mix them in a certain proportion;

[0024] S2-1 Add water to the mixture obtained in S1 and stir thoroughly to complete the preparation;

[0025] Among them, the weighed kaolin is 75 parts to 85 parts, the magnesium hydroxide is 15 parts to 30 parts, the guar gum is 5 parts to 10 parts, the sodium hydroxymethyl cellulose is 3 parts to 5 parts, the sodium dichloroisocyanurate is 0.5 parts to 1 part, and the other gas treatment ingredients are 3 parts to 5 parts.

[0026] The fineness of kaolin is above 800 mesh.

[0027] A construction method of a gas digester comprises at least the following steps:

[0028] S2-1 Punching: Punch holes according to the design requirements;

[0029] S2-2 Liquid injection pipe and hole sealer: Connect three Φ50 PVC pipes, each 3 meters long, with threads, and insert them into the two bags of the bag-type hole sealer. Then put the hole sealer and PVC pipe into the drilled hole together;

[0030] S2-3 Sealing the hole: first connect the discharge port of the pneumatic grouting pump and the bag-type hole sealer with a quick connector;

[0031] S2-4 Add an appropriate amount of inorganic sealing material into the stirring device of the pneumatic grouting pump, and then add water to dilute it at a weight ratio of 1:0.8. After stirring evenly, start the pneumatic grouting pump. The inorganic sealing material is injected into the bag of the bag-type sealer. After the bag is filled and expanded, the pressure in the hole rises. When the pressure in the hole reaches the maximum pressure of the bursting valve of the sealer, the bursting valve bursts and starts to inject the gap between the two bags. After filling, the pressure gauge rises. When the pressure reaches the pressure set by the pressure-limiting valve of the pneumatic grouting pump, the grouting pump automatically stops working, and the grouting and sealing of the hole is completed.

[0032] The gas digester is mixed and stirred at a solid-liquid ratio of 1:20-30 to form a colloid;

[0033] When the pressure of the pneumatic grouting pump reaches 5MPa, stop injecting liquid and close the valve to allow the colloidal material to penetrate into the coal seam under pressure, lower the temperature of the coal seam, prevent spontaneous combustion of the coal seam, and reduce the gas concentration and content.

[0034] The diameter of the hole punched in S2-1 shall not be less than 133 mm;

[0035] In S2-2, the distance between the sealer and the bag does not exceed 5 meters, and 1 meter is exposed.

[0036] The present invention and its implementation methods are described above, and such description is not restrictive, and the actual structure is not limited thereto. In short, if ordinary technicians in the field are inspired by it, without departing from the purpose of the invention, they can design structures and embodiments similar to the technical solution without creativity, which should all fall within the protection scope of the present invention.

Claims

1. A method for preparing a gas digester, comprising at least the following steps: S1-1 Weigh a certain amount of kaolin, magnesium hydroxide, guar gum, sodium hydroxymethyl cellulose, sodium dichloroisocyanurate and other components for gas treatment, and mix them in a certain proportion; S2-1 Add water to the mixture obtained in S1 and stir thoroughly to complete the preparation.

2. The method for preparing a gas digester according to claim 1, characterized in that: in, The weighed kaolin is 75-85 parts, magnesium hydroxide is 15-30 parts, guar gum is 5-10 parts, sodium hydroxymethyl cellulose is 3-5 parts, sodium dichloroisocyanurate is 0.5-1 part, and other gas treatment ingredients are 3-5 parts.

3. The method for preparing a gas digester according to claim 1, characterized in that: The fineness of kaolin is above 800 mesh.

4. The construction method of a gas digester according to claim 1, comprising at least the following steps: 2-1 Punching: Punch holes according to the design requirements; S2-2 Liquid injection pipe and hole sealer: Connect three Φ50 PVC pipes, each 3 meters long, with threads, and insert them into the two bags of the bag-type hole sealer. Then put the hole sealer and PVC pipe into the drilled hole together; S2-3 Sealing the hole: first connect the discharge port of the pneumatic grouting pump and the bag-type hole sealer with a quick connector; S2-4 Add an appropriate amount of inorganic sealing material into the stirring device of the pneumatic grouting pump, and then add water to dilute it at a weight ratio of 1:0.

8. After stirring evenly, start the pneumatic grouting pump. The inorganic sealing material is injected into the bag of the bag-type sealer. After the bag is filled and expanded, the pressure in the hole rises. When the pressure in the hole reaches the maximum pressure of the bursting valve of the sealer, the bursting valve bursts and starts to inject the gap between the two bags. After filling, the pressure gauge rises. When the pressure reaches the pressure set by the pressure-limiting valve of the pneumatic grouting pump, the grouting pump automatically stops working, and the grouting and sealing of the hole is completed.

5. The construction method of a gas digester according to claim 4, characterized in that: The gas digester is mixed and stirred at a solid-liquid ratio of 1:20-30 to form a colloid.

6. The construction method of a gas digester according to claim 4, characterized in that: When the pressure of the pneumatic grouting pump reaches 5MPa, stop injecting liquid and close the valve to allow the colloidal material to penetrate into the coal seam under pressure, lower the temperature of the coal seam, prevent spontaneous combustion of the coal seam, and reduce the gas concentration and content.

7. The construction method of a gas digester according to claim 4, characterized in that: The diameter of the hole punched in S2-1 shall not be less than 133mm.

8. The construction method of a gas digester according to claim 4, characterized in that In S2-1 and S2-2, the distance between the sealer and the bag is no more than 5 meters, and 1 meter is exposed.