CN112796793A - Thin spraying material for reinforcing, beautifying and supporting sealing of coal mine tunnel - Google Patents
Thin spraying material for reinforcing, beautifying and supporting sealing of coal mine tunnel Download PDFInfo
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- CN112796793A CN112796793A CN202110218040.3A CN202110218040A CN112796793A CN 112796793 A CN112796793 A CN 112796793A CN 202110218040 A CN202110218040 A CN 202110218040A CN 112796793 A CN112796793 A CN 112796793A
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- 239000000463 material Substances 0.000 title claims abstract description 77
- 239000003245 coal Substances 0.000 title claims abstract description 40
- 238000005507 spraying Methods 0.000 title claims abstract description 34
- 238000007789 sealing Methods 0.000 title claims abstract description 28
- 230000003014 reinforcing effect Effects 0.000 title claims abstract description 16
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 55
- 239000004576 sand Substances 0.000 claims abstract description 48
- 239000010881 fly ash Substances 0.000 claims abstract description 41
- 239000011398 Portland cement Substances 0.000 claims abstract description 39
- 239000003638 chemical reducing agent Substances 0.000 claims abstract description 31
- 229920001577 copolymer Polymers 0.000 claims abstract description 31
- 239000000839 emulsion Substances 0.000 claims abstract description 31
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 23
- 229920002396 Polyurea Polymers 0.000 claims abstract description 23
- 229920001971 elastomer Polymers 0.000 claims abstract description 23
- 229910002804 graphite Inorganic materials 0.000 claims abstract description 23
- 239000010439 graphite Substances 0.000 claims abstract description 23
- 239000000843 powder Substances 0.000 claims abstract description 23
- 239000004575 stone Substances 0.000 claims abstract description 21
- 239000000654 additive Substances 0.000 claims abstract description 17
- 230000000996 additive effect Effects 0.000 claims abstract description 17
- 239000012752 auxiliary agent Substances 0.000 claims abstract description 11
- 239000004568 cement Substances 0.000 claims description 40
- 239000002994 raw material Substances 0.000 claims description 20
- 239000004567 concrete Substances 0.000 claims description 11
- 239000002270 dispersing agent Substances 0.000 claims description 8
- DGVVJWXRCWCCOD-UHFFFAOYSA-N naphthalene;hydrate Chemical group O.C1=CC=CC2=CC=CC=C21 DGVVJWXRCWCCOD-UHFFFAOYSA-N 0.000 claims description 8
- 239000003795 chemical substances by application Substances 0.000 claims description 3
- 238000005422 blasting Methods 0.000 claims 9
- 230000002787 reinforcement Effects 0.000 claims 9
- 239000007921 spray Substances 0.000 abstract description 27
- 230000007797 corrosion Effects 0.000 abstract description 13
- 238000005260 corrosion Methods 0.000 abstract description 13
- 239000011435 rock Substances 0.000 abstract description 12
- 239000002184 metal Substances 0.000 abstract description 10
- 238000010276 construction Methods 0.000 abstract description 8
- 230000032683 aging Effects 0.000 abstract description 5
- 239000011378 shotcrete Substances 0.000 abstract description 5
- 238000005516 engineering process Methods 0.000 abstract description 4
- 230000007547 defect Effects 0.000 abstract description 3
- 239000000853 adhesive Substances 0.000 abstract description 2
- 230000001070 adhesive effect Effects 0.000 abstract description 2
- 238000000576 coating method Methods 0.000 abstract description 2
- 239000003973 paint Substances 0.000 abstract description 2
- 239000003566 sealing material Substances 0.000 abstract description 2
- 239000002341 toxic gas Substances 0.000 abstract description 2
- 239000011248 coating agent Substances 0.000 abstract 1
- 238000005536 corrosion prevention Methods 0.000 abstract 1
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 abstract 1
- 230000002265 prevention Effects 0.000 abstract 1
- 230000003068 static effect Effects 0.000 abstract 1
- 230000000694 effects Effects 0.000 description 7
- 230000007613 environmental effect Effects 0.000 description 6
- 239000007788 liquid Substances 0.000 description 6
- 239000003469 silicate cement Substances 0.000 description 6
- 230000009471 action Effects 0.000 description 3
- 230000008901 benefit Effects 0.000 description 3
- 238000002347 injection Methods 0.000 description 3
- 239000007924 injection Substances 0.000 description 3
- 230000005855 radiation Effects 0.000 description 3
- 239000000428 dust Substances 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 238000011282 treatment Methods 0.000 description 2
- 230000005641 tunneling Effects 0.000 description 2
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 1
- 230000003712 anti-aging effect Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 230000009977 dual effect Effects 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 238000005065 mining Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 230000035882 stress Effects 0.000 description 1
- 229910052717 sulfur Inorganic materials 0.000 description 1
- 239000011593 sulfur Substances 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D11/00—Lining tunnels, galleries or other underground cavities, e.g. large underground chambers; Linings therefor; Making such linings in situ, e.g. by assembling
- E21D11/04—Lining with building materials
- E21D11/10—Lining with building materials with concrete cast in situ; Shuttering also lost shutterings, e.g. made of blocks, of metal plates or other equipment adapted therefor
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D11/00—Lining tunnels, galleries or other underground cavities, e.g. large underground chambers; Linings therefor; Making such linings in situ, e.g. by assembling
- E21D11/14—Lining predominantly with metal
- E21D11/15—Plate linings; Laggings, i.e. linings designed for holding back formation material or for transmitting the load to main supporting members
- E21D11/152—Laggings made of grids or nettings
Landscapes
- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Architecture (AREA)
- Structural Engineering (AREA)
- Civil Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- Lining And Supports For Tunnels (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
Abstract
The invention discloses a thin spraying material for reinforcing, beautifying and supporting sealing of a coal mine tunnel, which comprises the following components: portland cement; sand; stone: fly ash; polyurea rubber powder; acrylic ester copolymer emulsion; an accelerator; graphite; an additive; a water reducing agent; and (4) an auxiliary agent. The thin spray material for reinforcing, beautifying and supporting sealing of the coal mine tunnel has the characteristics of no toxic gas release, high construction speed, rust and corrosion prevention, flame retardance, static resistance and the like, can effectively solve the defects of low construction speed, poor labor environment, large auxiliary transportation amount, multiple potential safety hazards and the like of the existing sprayed concrete technology, is a green environment-friendly material for spraying the underground tunnel of the coal mine, can be used for beautifying the tunnel, improving the pollution resistance of the tunnel and the standard level of the tunnel quality, can perfectly replace underground coating or paint, has the bonding strength of a non-reactive thin spray sealing material, a coal rock wall and a metal net up to more than 2MPa, and has strong adhesive force, ageing resistance, no falling off and effective prevention of coal rock stratum weathering and metal net corrosion.
Description
Technical Field
The invention relates to the technical field of thin spraying materials, in particular to a thin spraying material for reinforcing, beautifying, supporting and sealing a coal mine roadway.
Background
The underground coal mine anchor net support is a great change of coal mine support technology, changes passive support into active support, and plays an important role in improving coal mine economic benefit and improving support effect. However, with the increase of the mining depth of the coal mine, the pressure of the anchor rod is gradually increased under the action of the stress deformation of the roadway. In some exposed roadways of coal mines in which anchor net support is completed but concrete is not sprayed, the phenomena of metal net corrosion and surrounding rock weathering can occur due to the fact that underground air is moist and the support time is not long after tunneling. Under the dual action of underground moisture and dirty air in the roadway, the rock strata or coal seams on the surface of the roadway are gradually weathered, and the strength of surrounding rocks is gradually reduced. Under the action of the anchor rod, weathered surrounding rocks are easily crushed by the anchor rod tray, once the surrounding rocks below the tray are damaged, the anchor rod has no impact force, and the action force is reduced along with the impact force or even completely fails. Under the conditions of a coal mine underground wet environment, a sulfur-containing coal seam and the like, corrosion of the anchor rods, the trays and the metal nets is accelerated, the metal nets or the anchor rods are broken at the parts of the metal nets which are corroded seriously and loosened by weathering, the anchor rod assembly is deformed or weakened by the corrosion of metal supporting materials such as the anchor rods, the prestress of the anchor rods cannot be guaranteed, and therefore the support is failed gradually, so that the overall stability of a roadway is seriously influenced, the normal production of a mine is seriously influenced, and the safety of the mine is seriously threatened. Causing safety accidents such as roof fall of the tunnel. Therefore, in order to ensure the safety of mine production and meet the use requirements of the roadway, the constructed roadway must be subjected to treatments of preventing surrounding rock weathering, preventing the anchor bolt support from being rusted and the like, and the newly excavated roadway is subjected to timely sealing treatment to prevent the failure of the roadway support. At present, the underground coal mine of China basically adopts common sprayed concrete to seal a roadway, so that the problems of surrounding rock weathering and corrosion of a metal anchor rod are solved.
The defects of the method for sealing the surrounding rock by using common dry-spraying concrete in the market are more and more obvious: 1. the construction process is complex, the labor intensity of workers is high, the injection speed is low, and particularly, for the machine-driven anchor net roadway, the injection concrete is adopted for sealing, and the injection construction speed is far from the pace of the mechanical flower tunneling speed; 2. the sprayed concrete has high rebound rate and high cost. 3. The dust concentration is high, and the environment of a construction site is poor; fourthly, the function of the sprayed concrete on improving the supporting strength of the roadway is not obvious, and the roadway sprayed and mixed under the influence of dynamic pressure is easy to peel off and fall off to influence the safety, so that a thin spraying material for reinforcing, beautifying and supporting and sealing the roadway of the coal mine is provided, and the problems provided in the prior art are solved conveniently.
Disclosure of Invention
The invention aims to provide a thin spraying material for reinforcing, beautifying, supporting and sealing a coal mine roadway, and aims to solve the problems in the current market brought forward by the background technology.
In order to achieve the purpose, the invention provides the following technical scheme: a thin spraying material for reinforcing, beautifying and supporting sealing of a coal mine roadway comprises the following components: portland cement; sand; stone: fly ash; polyurea rubber powder; acrylic ester copolymer emulsion; an accelerator; graphite; an additive; a water reducing agent; and (4) an auxiliary agent.
Preferably, the portland cement is one of P.O.42.5, P.O.52.5 and P.O.62.5 ordinary portland cement.
Preferably, the fly ash is first-grade fly ash, and the fineness of the first-grade fly ash is 8-12.
Preferably, the content of the polyurea rubber powder is 0.01-1%.
Preferably, the content of the acrylate copolymer emulsion is 10%.
Preferably, the content of the accelerator is 4%.
Preferably, the addition amount of the graphite is 0 to 10% of the total specific gravity.
Preferably, the additive is a dispersant.
Preferably, the water reducing agent is a naphthalene water reducing agent.
Preferably, the cement ratio of the portland cement to the gravel is 1: 4-1: 4.5, and the sand rate is preferably 45% -55%: the water cement ratio is preferably 0.4-0.45, the weight ratio of cement to sand during guniting is 1: 2-1: 3, the water cement ratio is 0.4-0.55, and when concrete is sprayed, the cement: sand: the weight ratio of the stones is 1:2:2 to 1:2.5:2, when the raw materials are weighed, the weight deviation of the portland cement and the accelerating agent is +/-2%, the weight deviation of the sand and the stones is +/-3%, and the weight ratio of the portland cement: fly ash: accelerator: acrylic ester copolymer emulsion: the optimal ratio of the auxiliary agent is 15:100:13: 70.
Compared with the prior art, the invention has the beneficial effects that: the thin spraying material for reinforcing, beautifying and supporting sealing of the coal mine tunnel comprises the following components in parts by weight:
(1) the material has the characteristics of no reaction heat release, no toxic gas release, high construction speed, corrosion resistance, flame retardance, antistatic property and the like, can effectively overcome the defects of low construction speed, poor labor environment, large material consumption, large auxiliary transportation amount, multiple potential safety hazards and the like of the existing sprayed concrete technology, is a green environment-friendly material for spraying underground roadways of coal mines, can be used as a roadway beautification material, improves the pollution resistance of the roadways, improves the standardized level of the roadway quality, and can perfectly replace underground coatings or paints;
(2) the bonding strength of the non-reactive thin-spraying sealing material, the coal rock wall and the metal net reaches more than 2MPa, the adhesive force is strong, the material is anti-aging and does not fall off, and the weathering of the coal rock layer and the corrosion of the metal net can be effectively prevented; the shrinkage is small, the ductility is good, the crack resistance and the deformation resistance are good, meanwhile, 20 meters of roadway spraying is averagely realized in each small shift, the construction speed is high, the rebound quantity is extremely small, the supporting cost is low, the labor intensity of workers is low, the dust is less, the environment is protected, the energy is saved, the consumption is reduced, and the economic benefit and the social benefit are good.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Example one
The invention provides a technical scheme that: a thin spraying material for reinforcing, beautifying and supporting sealing of a coal mine roadway comprises the following components: portland cement; sand; stone: fly ash; polyurea rubber powder; acrylic ester copolymer emulsion; an accelerator; graphite; an additive; a water reducing agent; and (4) an auxiliary agent.
The Portland cement is P.O.42.5.
The fly ash is selected from first-grade fly ash, and the fineness of the first-grade fly ash is 8-12.
The content of the polyurea rubber powder is 0.01 percent, the thin spraying material can be normally constructed under extremely severe environmental conditions by adding the polyurea rubber powder, the application range of the thin spraying material is enlarged, and meanwhile, the thin spraying material has multiple functions of wear resistance, water resistance, impact resistance, fatigue resistance, aging resistance, high temperature resistance, nuclear radiation resistance and the like.
The content of the acrylate copolymer emulsion is 1%, and the addition of the acrylate copolymer emulsion enables the prepared thin spray material to have better corrosion resistance and not to crack easily.
The content of the accelerator is 1 percent, so that the sprayed thin spraying material can be quickly solidified.
The addition amount of the graphite accounts for 1 percent of the whole proportion, and the addition of the graphite can ensure that the manufactured thin spray material has the antistatic effect.
The additive is a dispersing agent which can ensure that the raw materials are fused more thoroughly when being mixed, and the compatibility of various materials is improved.
The water reducing agent is selected from a naphthalene water reducing agent, and the amount of added water can be reduced when raw materials are mixed by selectively adding the water reducing agent, so that water resources are saved.
The cement ratio of the silicate cement to the sandstone is 1:4.1, and the sand rate is preferably 45%: the water cement ratio is preferably 0.4, the weight ratio of cement to sand in guniting is 1:2, the water cement ratio is 0.4, and when concrete is sprayed, the weight ratio of cement to sand is as follows: sand: the stone ratio is 1:2: 2.
When the raw materials are weighed, the weight deviation of the portland cement and the accelerator is +/-2%, and the weight deviation of the sand and the pebbles is +/-3%.
Portland cement: fly ash: accelerator: acrylic ester copolymer emulsion: the optimum ratio of the auxiliaries is 15:100:13:70, and mixing in this ratio increases the degree of cohesion of the liquid after mixing.
Example two
The invention provides a technical scheme that: a thin spraying material for reinforcing, beautifying and supporting sealing of a coal mine roadway comprises the following components: portland cement; sand; stone: fly ash; polyurea rubber powder; acrylic ester copolymer emulsion; an accelerator; graphite; an additive; a water reducing agent; and (4) an auxiliary agent.
The Portland cement is one of P.O.52.5 ordinary Portland cement.
The fly ash is selected from first-grade fly ash, and the fineness of the first-grade fly ash is 8-12.
The content of the polyurea rubber powder is 0.02 percent, the thin spraying material can be normally constructed under extremely severe environmental conditions by adding the polyurea rubber powder, the application range of the thin spraying material is enlarged, and meanwhile, the thin spraying material has multiple functions of wear resistance, water resistance, impact resistance, fatigue resistance, aging resistance, high temperature resistance, nuclear radiation resistance and the like.
The content of the acrylate copolymer emulsion is 2%, and the addition of the acrylate copolymer emulsion enables the prepared thin spray material to have better corrosion resistance and not to crack easily.
The content of the accelerator is 2%, so that the sprayed thin spray material can be quickly solidified.
The addition amount of the graphite accounts for 2 percent of the whole proportion, and the addition of the graphite can ensure that the manufactured thin spray material has the antistatic effect.
The additive is a dispersing agent which can ensure that the raw materials are fused more thoroughly when being mixed, and the compatibility of various materials is improved.
The water reducing agent is selected from a naphthalene water reducing agent, and the amount of added water can be reduced when raw materials are mixed by selectively adding the water reducing agent, so that water resources are saved.
The cement ratio of the silicate cement to the sand stone is 1:4.2, and the sand rate is preferably 47%: the water cement ratio is preferably 0.41, the weight ratio of cement to sand in guniting is 1:2.1, the water cement ratio is 0.42, and when concrete is sprayed, the weight ratio of cement to sand is as follows: sand: the stone ratio is 1:2.1: 2.
When the raw materials are weighed, the weight deviation of the portland cement and the accelerator is +/-2%, and the weight deviation of the sand and the pebbles is +/-3%.
Portland cement: fly ash: accelerator: acrylic ester copolymer emulsion: the optimum ratio of the auxiliaries is 15:100:13:70, and mixing in this ratio increases the degree of cohesion of the liquid after mixing.
EXAMPLE III
The invention provides a technical scheme that: a thin spraying material for reinforcing, beautifying and supporting sealing of a coal mine roadway comprises the following components: portland cement; sand; stone: fly ash; polyurea rubber powder; acrylic ester copolymer emulsion; an accelerator; graphite; an additive; a water reducing agent; and (4) an auxiliary agent.
The Portland cement is one of P.O.62.5 ordinary Portland cement.
The fly ash is selected from first-grade fly ash, and the fineness of the first-grade fly ash is 8-12.
The content of the polyurea rubber powder is 0.03 percent, the thin spray material can be normally constructed under extremely severe environmental conditions due to the addition of the polyurea rubber powder, the application range of the thin spray material is enlarged, and meanwhile, the thin spray material can have multiple functions of water resistance, aging resistance, high temperature resistance and the like, so that the service life of the thin spray material is greatly prolonged.
The content of the acrylate copolymer emulsion is 3%, and the addition of the acrylate copolymer emulsion enables the prepared thin spray material to have better corrosion resistance and not to crack easily.
The content of the accelerator is 3%, so that the sprayed thin spray material can be quickly solidified.
The addition amount of the graphite accounts for 3 percent of the whole proportion, and the addition of the graphite can ensure that the manufactured thin spray material has the antistatic effect.
The additive is a dispersing agent which can ensure that the raw materials are fused more thoroughly when being mixed, and the compatibility of various materials is improved.
The water reducing agent is selected from a naphthalene water reducing agent, and the amount of added water can be reduced when raw materials are mixed by selectively adding the water reducing agent, so that water resources are saved.
The cement ratio of the silicate cement to the sand stone is 1:4.2, and the sand rate is preferably 48%: the water cement ratio is preferably 0.43, the weight ratio of cement to sand in guniting is 1:2.5, the water cement ratio is 0.45, and when concrete is sprayed, the weight ratio of cement: sand: the stone ratio is 1:2.3: 2.
When the raw materials are weighed, the weight deviation of the portland cement and the accelerator is +/-2%, and the weight deviation of the sand and the pebbles is +/-3%.
Portland cement: fly ash: accelerator: acrylic ester copolymer emulsion: the optimum ratio of the auxiliaries is 15:100:13:70, and mixing in this ratio increases the degree of cohesion of the liquid after mixing.
Example four
The invention provides a technical scheme that: a thin spraying material for reinforcing, beautifying and supporting sealing of a coal mine roadway comprises the following components: portland cement; sand; stone: fly ash; polyurea rubber powder; acrylic ester copolymer emulsion; an accelerator; graphite; an additive; a water reducing agent; and (4) an auxiliary agent.
The Portland cement is P.O.42.5.
The fly ash is selected from first-grade fly ash, and the fineness of the first-grade fly ash is 8-12.
The content of the polyurea rubber powder is 0.05 percent, the thin spraying material can be normally constructed under extremely severe environmental conditions by adding the polyurea rubber powder, the application range of the thin spraying material is enlarged, and meanwhile, the thin spraying material has multiple functions of wear resistance, water resistance, impact resistance, fatigue resistance, aging resistance, high temperature resistance, nuclear radiation resistance and the like.
The content of the acrylate copolymer emulsion is 5%, and the addition of the acrylate copolymer emulsion enables the prepared thin spray material to have better corrosion resistance and not to crack easily.
The content of the accelerator is 4%, so that the sprayed thin spraying material can be quickly solidified.
The addition amount of the graphite accounts for 5 percent of the whole proportion, and the addition of the graphite can ensure that the manufactured thin spray material has the antistatic effect.
The additive is a dispersing agent which can ensure that the raw materials are fused more thoroughly when being mixed, and the compatibility of various materials is improved.
The water reducing agent is selected from a naphthalene water reducing agent, and the amount of added water can be reduced when raw materials are mixed by selectively adding the water reducing agent, so that water resources are saved.
The cement ratio of the silicate cement to the sand is 1:4.4, the sand rate is preferably 50%, the water cement ratio is preferably 0.43, the weight ratio of the cement to the sand is 1:2.5 during guniting, the water cement ratio is 0.47, and when the concrete is sprayed, the cement: sand: the stone ratio is 1:2.4: 2.
When the raw materials are weighed, the weight deviation of the portland cement and the accelerator is +/-4%, and the weight deviation of the sand and the pebbles is +/-5%.
Portland cement: fly ash: accelerator: acrylic ester copolymer emulsion: the optimum ratio of the auxiliaries is 15:100:13:70, and mixing in this ratio increases the degree of cohesion of the liquid after mixing.
EXAMPLE five
The invention provides a technical scheme that: a thin spraying material for reinforcing, beautifying and supporting sealing of a coal mine roadway comprises the following components: portland cement; sand; stone: fly ash; polyurea rubber powder; acrylic ester copolymer emulsion; an accelerator; graphite; an additive; a water reducing agent; and (4) an auxiliary agent.
The Portland cement is P.O.52.5.
The fly ash is selected from first-grade fly ash, and the fineness of the first-grade fly ash is 8-12.
The content of the polyurea rubber powder is 0.05%, the thin spray material can be normally constructed under extremely severe environmental conditions due to the addition of the polyurea rubber powder, the application range of the thin spray material is enlarged, meanwhile, the thin spray material can have a wear-resistant function, and the wear-resistant performance of the thin spray material is improved.
The content of the acrylate copolymer emulsion is 8%, and the addition of the acrylate copolymer emulsion enables the prepared thin spray material to have better corrosion resistance and not to crack easily.
The content of the accelerator is 6 percent, so that the sprayed thin spraying material can be quickly solidified.
The addition amount of the graphite accounts for 5 percent of the whole proportion, and the addition of the graphite can ensure that the manufactured thin spray material has the antistatic effect.
The additive is a dispersing agent which can ensure that the raw materials are fused more thoroughly when being mixed, and the compatibility of various materials is improved.
The water reducing agent is selected from a naphthalene water reducing agent, and the amount of added water can be reduced when raw materials are mixed by selectively adding the water reducing agent, so that water resources are saved.
The cement ratio of the silicate cement to the sandstone is 1:4.5, and the sand rate is preferably 50%: the water cement ratio is preferably 0.45, the weight ratio of cement to sand during guniting is 1:3, the water cement ratio is 0.55, and when concrete is sprayed, the weight ratio of cement to sand is as follows: sand: the stone ratio is 1:2.5: 2.
When the raw materials are weighed, the weight deviation of the portland cement and the accelerator is +/-6%, and the weight deviation of the sand and the pebbles is +/-7%.
Portland cement: fly ash: accelerator: acrylic ester copolymer emulsion: the optimum ratio of the auxiliaries is 15:100:13:70, and mixing in this ratio increases the degree of cohesion of the liquid after mixing.
EXAMPLE six
The invention provides a technical scheme that: a thin spraying material for reinforcing, beautifying and supporting sealing of a coal mine roadway comprises the following components: portland cement; sand; stone: fly ash; polyurea rubber powder; acrylic ester copolymer emulsion; an accelerator; graphite; an additive; a water reducing agent; and (4) an auxiliary agent.
The Portland cement is P.O.62.5.
The fly ash is selected from first-grade fly ash, and the fineness of the first-grade fly ash is 8-12.
The content of the polyurea rubber powder is 1%, the thin spray material can be normally constructed under extremely severe environmental conditions due to the addition of the polyurea rubber powder, the application range of the thin spray material is enlarged, and meanwhile, the impact resistance and the fatigue resistance of the thin spray material can be greatly enhanced.
The content of the acrylate copolymer emulsion is 15%, and the addition of the acrylate copolymer emulsion enables the prepared thin spray material to have better corrosion resistance and not to crack easily.
The content of the accelerator is 8%, so that the sprayed thin spraying material can be quickly solidified.
The addition amount of the graphite accounts for 8 percent of the whole proportion, and the addition of the graphite can ensure that the manufactured thin spray material has the antistatic effect.
The additive is a dispersing agent which can ensure that the raw materials are fused more thoroughly when being mixed, and the compatibility of various materials is improved.
The water reducing agent is selected from a naphthalene water reducing agent, and the amount of added water can be reduced when raw materials are mixed by selectively adding the water reducing agent, so that water resources are saved.
The cement ratio of the silicate cement to the sandstone is 1:4.5, and the sand rate is preferably 55%: the water cement ratio is preferably 0.45, the weight ratio of cement to sand during guniting is 1:3, the water cement ratio is 0.55, and when concrete is sprayed, the weight ratio of cement to sand is as follows: sand: the stone ratio is 1:2.5: 2.
When the raw materials are weighed, the weight deviation of the portland cement and the accelerator is +/-4%, and the weight deviation of the sand and the pebbles is +/-5%.
Portland cement: fly ash: accelerator: acrylic ester copolymer emulsion: the optimum ratio of the auxiliaries is 15:100:13:70, and mixing in this ratio increases the degree of cohesion of the liquid after mixing.
Although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that various changes in the embodiments and/or modifications of the invention can be made, and equivalents and modifications of some features of the invention can be made without departing from the spirit and scope of the invention.
Claims (10)
1. The thin spraying material for reinforcing, beautifying and supporting sealing of the coal mine roadway is characterized by comprising the following components: portland cement; sand; stone: fly ash; polyurea rubber powder; acrylic ester copolymer emulsion; an accelerator; graphite; an additive; a water reducing agent; and (4) an auxiliary agent.
2. The thin blasting material for the reinforcement, beautification, support and sealing of the coal mine tunnel according to claim 1, is characterized in that: the Portland cement is one of P.O.42.5, P.O.52.5 and P.O.62.5 common Portland cement.
3. The thin blasting material for the reinforcement, beautification, support and sealing of the coal mine tunnel according to claim 1, is characterized in that: the fly ash is selected from first-grade fly ash, and the fineness of the first-grade fly ash is 8-12.
4. The thin blasting material for the reinforcement, beautification, support and sealing of the coal mine tunnel according to claim 1, is characterized in that: the content of the polyurea rubber powder is 0.01-1%.
5. The thin blasting material for the reinforcement, beautification, support and sealing of the coal mine tunnel according to claim 1, is characterized in that: the content of the acrylic ester copolymer emulsion is 10%.
6. The thin blasting material for the reinforcement, beautification, support and sealing of the coal mine tunnel according to claim 1, is characterized in that: the content of the accelerating agent is 4%.
7. The thin blasting material for the reinforcement, beautification, support and sealing of the coal mine tunnel according to claim 1, is characterized in that: the addition amount of the graphite accounts for 0-10% of the whole proportion.
8. The thin blasting material for the reinforcement, beautification, support and sealing of the coal mine tunnel according to claim 1, is characterized in that: the additive is a dispersant.
9. The thin blasting material for the reinforcement, beautification, support and sealing of the coal mine tunnel according to claim 1, is characterized in that: the water reducing agent is a naphthalene water reducing agent.
10. The thin blasting material for the reinforcement, beautification, support and sealing of the coal mine tunnel according to claim 1, is characterized in that: the cement ratio of the portland cement to the gravel is 1: 4-1: 4.5, and the sand rate is preferably 45% -55%: the water cement ratio is preferably 0.4-0.45, the weight ratio of cement to sand during guniting is 1: 2-1: 3, the water cement ratio is 0.4-0.55, and when concrete is sprayed, the cement: sand: the weight ratio of the stones is 1:2:2 to 1:2.5:2, when the raw materials are weighed, the weight deviation of the portland cement and the accelerating agent is +/-2%, the weight deviation of the sand and the stones is +/-3%, and the weight ratio of the portland cement: fly ash: accelerator: acrylic ester copolymer emulsion: the optimal ratio of the auxiliary agent is 15:100:13: 70.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110218040.3A CN112796793A (en) | 2021-02-26 | 2021-02-26 | Thin spraying material for reinforcing, beautifying and supporting sealing of coal mine tunnel |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110218040.3A CN112796793A (en) | 2021-02-26 | 2021-02-26 | Thin spraying material for reinforcing, beautifying and supporting sealing of coal mine tunnel |
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| Publication Number | Publication Date |
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| CN112796793A true CN112796793A (en) | 2021-05-14 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110218040.3A Withdrawn CN112796793A (en) | 2021-02-26 | 2021-02-26 | Thin spraying material for reinforcing, beautifying and supporting sealing of coal mine tunnel |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114890753A (en) * | 2022-06-15 | 2022-08-12 | 山西四通晋业科技有限公司 | Mining thin-spraying flexible supporting material |
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2021
- 2021-02-26 CN CN202110218040.3A patent/CN112796793A/en not_active Withdrawn
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114890753A (en) * | 2022-06-15 | 2022-08-12 | 山西四通晋业科技有限公司 | Mining thin-spraying flexible supporting material |
| CN114890753B (en) * | 2022-06-15 | 2023-05-26 | 山西四通晋业科技有限公司 | Mining thin-spraying flexible supporting material |
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