Inorganic low-temperature foaming material for mine filling and preparation method of inorganic low-temperature foaming material

Abstract

The invention relates to the technical field of filling materials, and discloses a mine filling inorganic low-temperature foaming material and a preparation method thereof.The mine filling inorganic low-temperature foaming material is prepared from a material A, a material B and a material C, the material A is composed of 600-800 parts of inorganic acid, 200-300 parts of lime, 50-150 parts of triethanolamine and 10-20 parts of coagulant, and the material A plays a role in curing; the material B is a foaming material and is obtained by mixing 90-100 parts by weight of resin, 6-10 parts by weight of a flame retardant, 5-15 parts by weight of a foaming agent, 1-5 parts by weight of a stabilizer, 1-15 parts by weight of a cosolvent, 2-16 parts by weight of an antistatic agent and 10-30 parts by weight of a plasticizer and stirring and reacting at 30-50 DEG C for 0.5-2 hours. The filling material is used for filling holes, cracks and air leakage channels of coal rocks in a top-coal-caving area and plugging air leakage of a working face and a goaf, and gas in the goaf can be prevented from gushing out.

Description

Technical Field

[0001] The invention relates to the technical field of filling materials, and in particular to an inorganic low-temperature foaming material for mine filling and a preparation method thereof. Background Art

[0002] At present, the foam material used for filling in coal mines reacts at a high temperature during use, which makes it inconvenient to use and poses certain safety hazards. In addition, during actual use, it has poor adhesion to the coal seam, poor flame retardancy, and large shrinkage during use, resulting in poor use effect. Summary of the invention

[0003] The purpose of the present invention is to solve the shortcomings of the prior art and to propose an inorganic low-temperature foaming material for mine filling and a preparation method thereof.

[0004] In order to achieve the above-mentioned purpose, the present invention adopts the following technical scheme: an inorganic low-temperature foaming material for mine filling and a preparation method thereof, which is composed of independent A material and B material.

[0005] Material A is composed of 600-800 parts of inorganic acid, 200-300 parts of lime, 50-100 parts of lime, 50-150 parts of triethanolamine and 10-20 parts of coagulant, and the material A plays a role of solidification.

[0006] The material B is a foaming material, which is obtained by mixing 90 to 100 parts of resin, 6 to 10 parts of flame retardant, 5 to 15 parts of foaming agent, 1 to 5 parts of stabilizer, 1 to 15 parts of cosolvent, 2 to 16 parts of antistatic agent and 10 to 30 parts of plasticizer, and stirring and reacting at 50 to 60 degrees Celsius for 1 hour to 2 hours.

[0007] As a further description of the above technical solution:

[0008] The inorganic acid is sulphoaluminate cement clinker, and the coagulant is composed of 2 to 5 parts of accelerator, 4 to 7 parts of rapid gelling agent and 4 to 8 parts of super retarder.

[0009] As a further description of the above technical solution:

[0010] Among them, the resin is phenolic resin, the curing agent is one of inorganic curing agents such as cement, lime, fly ash or a mixture thereof, the flame retardant is one of antimony trioxide or zinc borate or a mixture thereof, the foaming agent is an alkane physical foaming agent, the stabilizer is an antimony thiol stabilizer, the co-solvent is an amide compound, and the antistatic agent is a permanent internal mixed antistatic agent.

[0011] The present invention has the following beneficial effects:

[0012] 1. The material of the present invention is used for safe production in coal mines, providing a guarantee for safe and efficient production in mines.

[0013] 2. The slurry of the material of the present invention has a high stone formation rate, does not crack, can adapt to the deformation of the coal (rock) body after reinforcement, and has a certain flexibility.

[0014] 3. The material of the present invention has strong permeability and good fluidity and can penetrate into the tiny gaps of coal (rock) bodies.

[0015] 4. The production process, product components and polymers of the material of the present invention are non-toxic, harmless to the human body, non-polluting, and meet environmental protection requirements.

[0016] 5. The material of the present invention can also be used for reinforcement and filling in industries such as hydropower, construction, mining and transportation.

[0017] 6. The material of the present invention is formed by foaming and expanding immediately after mixing with a curing agent. The expansion can reach 15 to 30% of the original volume. The expanded foam can solidify and harden within a few minutes. The material belongs to a flame-retardant Class B material and is suitable for gas mines and fire-prone areas.

[0018] 7. The material of the present invention is suitable for filling coal-rock cavities, cracks and air leakage channels in high-risk areas, as well as blocking air leakage in working faces and goafs, thereby preventing gas from gushing out of goafs. DETAILED DESCRIPTION

[0019] The following will be combined with the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. 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.

[0020] Example 1

[0021] Material A is composed of 600 parts of mineral acid, 200 parts of lime, 50 parts of lime, 50 parts of triethanolamine and 10 parts of coagulant.

[0022] The setting agent includes 2 parts of accelerator, 4 parts of rapid gelling agent and 4 parts of super retarder.

[0023] The preparation steps of material A include at least the following steps:

[0024] S1: Take 600 parts of mineral acid, 200 parts of limestone, 50 parts of lime and 10 parts of coagulant;

[0025] S2: crushing the limestone and collecting the dust generated during the crushing process;

[0026] S3: mixing the collected dust with lime to obtain a primary mixture;

[0027] S4: 600 parts of inorganic acid, 50 parts of triethanolamine and 10 parts of coagulant are put into a stirrer and mixed with the primary mixture;

[0028] S5: Add soapy water to the mixture in S4 and stir evenly to obtain a curing agent.

[0029] Material B is composed of 90 parts of phenolic resin, 6 parts of flame retardant, 5 parts of foaming agent, 1 part of stabilizer, 1 part of cosolvent, 2 parts of antistatic agent and 10 parts of plasticizer, and is obtained by reacting in a stirrer at 50°C to 60°C for 1 to 2 hours.

[0030] The preparation process of phenolic resin is as follows: phenol and formaldehyde are put into a reaction kettle and stirred with a stirrer; heating is performed at the same time, and after reaching 85°C, NaOH catalyst is added, and heating is continued to 90°C and then kept warm for 1h to 2h; cooling to 75°C and reacting for 1h to 1.5h; then rapidly cooling to 65°C, neutralizing to a pH value of 6.0 to 7.0, and finally decompressing and dehydrating to obtain phenolic resin.

[0031] The preparation steps of material B include at least the following steps:

[0032] S1: Take 100 parts of phenolic resin (cooled to 60°C), 5 parts of antimony trioxide, 5 parts of foaming agent, 1 part of stabilizer, 1 part of cosolvent, 2 parts of antistatic agent and 10 parts of plasticizer and stir evenly;

[0033] S2: Add 5 parts of ethylene glycol, 10 parts of hexadecyltrimethylammonium chloride and 15 parts of diethyl phthalate to the stirred S1 mixture, mix well, and stir for 2 hours to obtain material B.

[0034] Inject material A and material B into the required place in a ratio of 1:1 through a dual-liquid grouting pump. Material A can reinforce larger fractured rock formations and fill gaps.

[0035] Material B can be used to fill coal and rock cavities, cracks and air leakage channels in high-risk areas, as well as to block air leakage in the working face and gas outflow in the goaf. It does not burn or support combustion, has stable performance and will not crack.

[0036] Example 2

[0037] Material A is composed of 700 parts of inorganic acid, 250 parts of limestone, 75 parts of lime, 125 parts of triethanolamine and 15 parts of coagulant.

[0038] The setting agent includes 4 parts of accelerator, 5 parts of rapid gelling agent and 6 parts of super retarder.

[0039] The steps of material preparation A include at least the following steps:

[0040] S1: Take 700 parts of mineral acid, 250 parts of limestone, 75 parts of lime, 125 parts of triethanolamine and 15 parts of coagulant;

[0041] S2: crushing the limestone and collecting the dust generated during the crushing process;

[0042] S3: mixing the collected dust with lime to obtain a primary mixture;

[0043] S4: 700 parts of inorganic acid and 15 parts of coagulant are put into a stirrer and mixed with the primary mixture;

[0044] S5: Add soapy water to the mixture in S4 and stir evenly to obtain a curing agent.

[0045] Material B is composed of 95 parts of phenolic resin, 8 parts of flame retardant, 10 parts of foaming agent, 3 parts of stabilizer, 8 parts of cosolvent, 9 parts of antistatic agent and 20 parts of plasticizer, and is obtained by stirring and reacting at 50°C to 60°C for 1h to 2h.

[0046] The preparation process of the phenolic resin is as follows: phenol and formaldehyde are put into a reaction kettle and stirred with a stirrer; heated at the same time, NaOH catalyst is added after reaching 85°C, and the mixture is heated to 90°C and kept warm for 1h to 2h; cooled to 75°C and reacted for 1h to 1.5h; then quickly cooled to 65°C, neutralized to a pH value of 6.0 to 7.0, and finally dehydrated under reduced pressure to obtain the phenolic resin.

[0047] S1: Take 95 parts of phenolic resin (cooled to 60°C), 8 parts of zinc borate, 10 parts of foaming agent, 3 parts of stabilizer, 8 parts of cosolvent, 9 parts of antistatic agent and 20 parts of plasticizer and stir evenly;

[0048] S2: Add 6 parts of ethylene glycol, 15 parts of hexadecyltrimethylammonium chloride and 20 parts of diethyl phthalate to the stirred S1 mixture, mix well, and stir for 2.5 hours to obtain material B.

[0049] Use a dual-liquid grouting pump to inject material A and material B into the required area in a ratio of 1:1.

[0050] A material can reinforce larger fractured rock formations and fill gaps;

[0051] Material B can be used to fill coal and rock cavities, cracks and air leakage channels in high-risk areas, as well as to block air leakage in the working face and gas outflow in the goaf. It does not burn or support combustion, has stable performance and will not crack.

[0052] Example 3

[0053] Material A is composed of 800 parts of inorganic acid, 300 parts of limestone, 100 parts of lime, 150 parts of triethanolamine and 20 parts of coagulant.

[0054] The setting agent includes 5 parts of accelerator, 7 parts of rapid gelling agent and 8 parts of super retarder.

[0055] The steps of material preparation A include at least the following steps:

[0056] S1: Take 800 parts of mineral acid, 300 parts of lime, 100 parts of lime, 150 parts of triethanolamine and 20 parts of coagulant;

[0057] S2: crushing the limestone and collecting the dust generated during the crushing process;

[0058] S3: mixing the collected dust with lime to obtain a primary mixture;

[0059] S4: 800 parts of inorganic acid and 20 parts of coagulant are put into a stirrer and mixed with the primary mixture;

[0060] S5: Add a certain amount of soapy water to the mixture in S4 and stir evenly to obtain a curing agent.

[0061] Material B is composed of 100 parts of phenolic resin, 10 parts of flame retardant, 15 parts of foaming agent, 5 parts of stabilizer, 15 parts of cosolvent, 16 parts of antistatic agent and 30 parts of plasticizer, and is obtained by stirring and reacting at 50°C to 60°C for 1h to 2h.

[0062] The preparation process of phenolic resin is as follows: phenol and formaldehyde are put into a reaction kettle and stirred with a stirrer; heating is performed at the same time, and after reaching 85°C, NaOH catalyst is added, and heating is continued to 90°C and then kept warm for 1h to 2h; cooling to 75°C and reacting for 1h to 1.5h; then rapidly cooling to 65°C, neutralizing to a pH value of 6.0 to 7.0, and finally decompressing and dehydrating to obtain phenolic resin.

[0063] S1: Take 95 parts of phenolic resin (cooled to 60°C), 8 parts of zinc borate, 10 parts of foaming agent, 3 parts of stabilizer, 8 parts of cosolvent, 9 parts of antistatic agent and 20 parts of plasticizer and stir evenly;

[0064] S2: Add 6 parts of ethylene glycol, 15 parts of hexadecyltrimethylammonium chloride and 20 parts of diethyl phthalate to the stirred S1 mixture, mix well, and stir for 2.5 hours to obtain material B.

[0065] Inject material A and material B into the required place in a ratio of 1:1 through a dual-liquid grouting pump. Material A can reinforce larger fractured rock formations and fill gaps.

[0066] Material B can be used to fill coal and rock cavities, cracks and air leakage channels in high-risk areas, as well as to block air leakage in the working face and gas outflow in the goaf. It does not burn or support combustion, has stable performance and will not crack.

[0067] The present invention and its implementation methods are described above, which is not restrictive and is one of the implementation methods of the present invention. The actual structure is not limited thereto. In short, if ordinary technicians in the field are inspired by it and design structural methods and embodiments similar to the technical solution without creativity without departing from the purpose of the invention, they should all fall within the protection scope of the present invention.

Claims

1. A mine filling inorganic low-temperature foaming material, which is composed of material A consisting of 600-800 parts of inorganic acid, 200-300 parts of lime, 50-150 parts of triethanolamine and 10-20 parts of coagulant, wherein the material A plays a curing role. The material B is a foaming material, which is obtained by mixing 90 to 100 parts by weight of resin, 6 to 10 parts by weight of flame retardant, 5 to 15 parts by weight of foaming agent, 1 to 5 parts by weight of stabilizer, 1 to 15 parts by weight of cosolvent, 2 to 16 parts by weight of antistatic agent and 10 to 30 parts by weight of plasticizer, and stirring and reacting at 30 to 50° C. for 0.5 to 2 hours.

2. The inorganic low-temperature foaming material for mine filling according to claim 1, characterized in that: The inorganic acid used is sulphoaluminate cement clinker.

3. The inorganic low-temperature foaming material coagulant for mine filling according to claim 1, characterized in that: It is composed of 2 to 5 parts of accelerator, 4 to 7 parts of rapid gelling agent and 4 to 8 parts of super retarder.

4. The inorganic low-temperature foaming material for mine filling according to claim 1, characterized in that: The resin is phenolic resin, the flame retardant is antimony trioxide or zinc borate or a mixture thereof, the foaming agent is an alkane physical foaming agent, the stabilizer is an antimony thiol stabilizer, the auxiliary solvent is an amide compound, and the antistatic agent is a permanent internal mixed antistatic agent.

5. The inorganic low-temperature foaming material for mine filling and the preparation method thereof according to claims 1 to 4, characterized in that: The preparation method of material A comprises at least the following steps: S1: Take mineral acid, limestone, lime and coagulant; S2: crushing the limestone and collecting the dust generated during the crushing process; S3: mixing the collected dust with lime to obtain a primary mixture; S4: putting the inorganic acid, triethanolamine and coagulant into a stirrer to mix with the primary mixture; S5: Add soapy water to the mixture in S4 and stir evenly to obtain a curing agent. Material B is composed of phenolic resin, flame retardant, foaming agent, stabilizer, cosolvent, antistatic agent and plasticizer, and is obtained by reacting in a stirrer at 50° C. to 60° C. for 1 to 2 hours.

6. The inorganic low-temperature foaming material for mine filling and the preparation method thereof according to claim 5, characterized in that: Use a dual-liquid grouting pump to inject material A and material B into the required area in a 1:1 ratio.