CN111533518A - Flexible spraying material for mine roadway support and preparation method and application thereof - Google Patents

Flexible spraying material for mine roadway support and preparation method and application thereof Download PDF

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Publication number
CN111533518A
CN111533518A CN202010394960.6A CN202010394960A CN111533518A CN 111533518 A CN111533518 A CN 111533518A CN 202010394960 A CN202010394960 A CN 202010394960A CN 111533518 A CN111533518 A CN 111533518A
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component
powder
spraying
cement
slag
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CN111533518B (en
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张志乾
祝静
魏宏亮
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Ganzhou Chuangketong Technology Co ltd
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Ganzhou Chuangketong Technology Co ltd
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    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B28/00—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
    • C04B28/02—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements containing hydraulic cements other than calcium sulfates
    • C04B28/06—Aluminous cements
    • C04B28/065—Calcium aluminosulfate cements, e.g. cements hydrating into ettringite
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B28/00—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B28/00—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
    • C04B28/02—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements containing hydraulic cements other than calcium sulfates
    • C04B28/021—Ash cements, e.g. fly ash cements ; Cements based on incineration residues, e.g. alkali-activated slags from waste incineration ; Kiln dust cements
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B28/00—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
    • C04B28/02—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements containing hydraulic cements other than calcium sulfates
    • C04B28/04—Portland cements
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B28/00—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
    • C04B28/02—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements containing hydraulic cements other than calcium sulfates
    • C04B28/06—Aluminous cements
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B28/00—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
    • C04B28/02—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements containing hydraulic cements other than calcium sulfates
    • C04B28/08—Slag cements
    • 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
    • E21D11/105—Transport or application of concrete specially adapted for the lining of tunnels or galleries ; Backfilling the space between main building element and the surrounding rock, e.g. with concrete
    • 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
    • E21D11/38—Waterproofing; Heat insulating; Soundproofing; Electric insulating
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
    • C04B2111/00034—Physico-chemical characteristics of the mixtures
    • C04B2111/00146—Sprayable or pumpable mixtures
    • C04B2111/00155—Sprayable, i.e. concrete-like, materials able to be shaped by spraying instead of by casting, e.g. gunite
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
    • C04B2111/00474—Uses not provided for elsewhere in C04B2111/00
    • C04B2111/00482—Coating or impregnation materials
    • C04B2111/00508—Cement paints
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
    • C04B2111/00474—Uses not provided for elsewhere in C04B2111/00
    • C04B2111/00724—Uses not provided for elsewhere in C04B2111/00 in mining operations, e.g. for backfilling; in making tunnels or galleries
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
    • C04B2111/20—Resistance against chemical, physical or biological attack
    • C04B2111/27—Water resistance, i.e. waterproof or water-repellent materials
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
    • C04B2111/20—Resistance against chemical, physical or biological attack
    • C04B2111/28—Fire resistance, i.e. materials resistant to accidental fires or high temperatures
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B2201/00—Mortars, concrete or artificial stone characterised by specific physical values
    • C04B2201/50—Mortars, concrete or artificial stone characterised by specific physical values for the mechanical strength

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Ceramic Engineering (AREA)
  • Structural Engineering (AREA)
  • Organic Chemistry (AREA)
  • Materials Engineering (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Inorganic Chemistry (AREA)
  • Mining & Mineral Resources (AREA)
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  • Geochemistry & Mineralogy (AREA)
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  • Life Sciences & Earth Sciences (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geology (AREA)
  • Combustion & Propulsion (AREA)
  • Curing Cements, Concrete, And Artificial Stone (AREA)
  • Lining And Supports For Tunnels (AREA)

Abstract

The invention relates to a flexible spraying material for mine roadway support and a preparation method and application thereof, belonging to the technical field of mine roadway support. ) The prepared slag-based anchor-spraying support guniting material is an organic-inorganic hybrid material, has no volatilization of harmful substances, and is safe and environment-friendly; the slag is doped with the guniting material, so that the effective utilization of the slag is developed, the secondary pollution is relieved, and the cost is reduced; the spraying construction of the vertical surface and the top surface does not flow, the construction environment is friendly, and the problems of rebound and dust pollution are avoided; has low curing temperature and flame retardant property.

Description

Flexible spraying material for mine roadway support and preparation method and application thereof
Technical Field
The invention relates to a flexible spraying material for mine roadway support and a preparation method and application thereof, belonging to the technical field of mine roadway support.
Background
Underground mine mining in China faces problems to be solved urgently, such as complex geological conditions, severe mining conditions, rock burst, geological collapse, large land occupation by slag and the like. For example, the coal mine underground surrounding rock mass is deliquesced and weathered, so that coal and rock mass cracking, underground water leakage, air leakage, gas aggregation and the like are caused, and the safety production of the coal mine is seriously influenced; the coal gangue is a large amount of solid waste generated in the coal mine development process, occupies a large land area, contains various harmful components, and causes soil and water pollution after being exposed in the atmosphere for a long time. The anchor-spraying technology is a mature roadway support technology applied to mines in China at present, comprises a plurality of support forms such as sprayed slurry, anchor rods, steel arch frames and reinforcing meshes, and can improve the stability of different surrounding rocks by reasonably combining one or more support forms in anchor-spraying support. The spraying slurry is an important component of anchor spraying technology, and the spraying is carried out on the surface of the surrounding rock, so that the exposed surface of the surrounding rock can be sealed, and the tightness and the durability are improved. At present, the guniting material used for anchor-shotcreting support is mainly hydraulic cementing materials such as shotcrete and the like, and a dry-type guniting machine is adopted for construction, so that the construction process is simple, the equipment price is low, and the operation is simple and convenient, but in long-term application, the shotcrete still has some defects:
(1) dust pollution is serious in the dry spraying process of the concrete, and the dust is easy to remain in a human body, so that the health of miners is influenced;
(2) the rebound rate is high, and the material waste is serious;
(3) the concrete is a brittle material, has low tensile strength, poor deformation resistance and cracking resistance, is not matched with the drawing action of the anchor rod, and has easy shedding and cracking of a guniting layer and needs to be maintained repeatedly;
(5) the concrete compactness is poor, in order to achieve the purposes of sealing the exposed surface of the surrounding rock and preventing the surrounding rock from deliquescing and weathering, the existing process needs to increase the guniting thickness (generally more than 10cm, the guniting thickness is increased to 30cm at uneven and severe cracking positions), the material consumption is large, the labor consumption is high, the underground transportation pressure is increased, and meanwhile, the risk of falling of a guniting layer is increased due to the increase of the thickness.
(6) The concrete material has long curing time, the speed for meeting the strength requirement of the support is low, and the construction time is long.
The prior art is more improved aiming at the problems of heavy dust pollution, high rebound rate, large slurry consumption, high cost and the like, for example, the CN107522442A patent is based on the improvement of a dry spraying process method, the slurry is mixed and processed in a factory and is directly added with water for use underground, and the improved process can reduce the dust pollution and the rebound rate in the concrete spraying process; patents CN1281829A, CN105110718A and CN107352904 respectively disclose a shotcrete supporting material prepared from coal gangue, which has high compressive strength, reduces dust pollution and rebound rate in the jetting process, and simultaneously reduces material cost, increases economic benefit and alleviates the problem of environmental pollution due to the use of waste coal gangue as raw material. However, the technology only reduces the rebound rate, the problem of material rebound waste in the concrete spraying process also exists, and the compactness, tensile strength and deformation resistance of the support material are not obviously improved, so that the problems of large thickness of a guniting layer, easy falling and cracking and the like cannot be effectively solved. In the technologies disclosed in patents CN1686197A and CN103159439A, polymer emulsions (such as polyvinyl acetate emulsion, styrene-butadiene emulsion, styrene-acrylic emulsion, and the like), polymer fibers, and the like are added in the preparation process of the guniting support material, so that the toughness (tensile strength and elongation at break) and compactness of the material can be improved, and the effects of preventing the guniting layer from cracking and dropping and reducing the thickness of the guniting layer are achieved. However, in the technology disclosed in CN1686197A, the curing time is only tens of seconds, which is not beneficial to on-site construction; patent CN103159439A uses a large amount of polymer emulsion (2: 1 ratio of polymer emulsion to powder), and the material cost is high.
Disclosure of Invention
The invention aims to solve the problems in the prior art, provides a flexible spraying material for mine roadway support and a preparation method and application thereof, and solves the long-term problems of roadway spraying, such as large using amount of a spraying material, thick slurry layer, high resilience rate, high material cost, high dust, serious pollution, poor compactness, easy falling and the like in the process of mine roadway anchor spraying support.
The technology of the invention is realized by the following technical scheme.
A flexible spraying material for mine roadway support is an organic-inorganic composite material and comprises a component A and a component B, wherein the mass ratio of the component A to the component B is 1: 0.5-3, and the preferred mass ratio is 1: 1-2;
the raw materials of the component A comprise fine aggregate, slag powder, a cement-based cementing material, reinforcing fiber, a speed-setting admixture and a retarder; the weight portion of the component A is 100, and the weight portion of each component is as follows:
Figure BSA0000208465330000031
preferably 24 to 28 parts of fine aggregate, 13 to 17 parts of slag powder, 50 to 58 parts of cement-based cementing material, 0.15 to 0.25 part of reinforcing fiber, 0.5 to 0.8 part of accelerator and 0.05 to 0.25 part of retarder;
the fine aggregate is powder with the particle size of less than 5mm, has the function of improving the compressive strength and the lubricity of a cement of the guniting material, and is selected from at least one of quartz powder, fine sand, coal gangue, hydrated lime and talcum powder, preferably from one or a mixture of the quartz powder and the fine sand; the fine sand is river sand, cobble, mountain sand, mountain cobble, sea sand or sea cobble;
the slag powder is various solid wastes with certain activity generated in the production process of metallurgical industry or the mining process of minerals, the proper addition can promote the slurry curing reaction of guniting materials and reduce the cost, the slag powder is selected from at least one of coal gangue, fly ash, lepidolite slag, kaolin slag, basalt slag, blast furnace iron slag, tin slag and tungsten slag, and preferably selected from at least one of coal gangue, fly ash and lepidolite slag;
the cement-based cementing material has the function of increasing the early compressive strength of a cement body of the guniting material, and improves the construction safety, and is selected from at least one of sulphoaluminate cement, Portland cement, slag cement, fly ash cement, aluminate cement, ferro-aluminate cement, fluoroaluminate cement, phosphoaluminate cement and alunite cement, preferably from one of sulphoaluminate cement and Portland cement;
the toughness of the cement of the guniting material can be obviously improved by adding a small amount of reinforcing fibers, the material cost control is not facilitated by adding a large amount of reinforcing fibers, the reinforcing fibers are selected from at least one of polyethylene fibers, polyvinyl alcohol fibers, polypropylene fibers, aramid fibers, glass fibers and carbon fibers, and preferably selected from one or two of the polyvinyl alcohol fibers and the polypropylene fibers;
the quick-setting admixture has the functions of improving the consistency of the guniting material slurry and promoting the gelling of the guniting material slurry, and is selected from at least one of 82 quick-setting admixture, 8880 type cement quick-setting admixture, sodium silicate powder, potassium silicate powder, sodium hydroxide powder, calcium hydroxide powder, aluminum sulfate powder and lithium carbonate powder, and preferably from at least one of 82 quick-setting admixture, sodium silicate powder and aluminum sulfate powder;
the retarder can regulate and control the initial setting reaction time of the guniting material slurry, and is selected from at least one of tartaric acid, citric acid, gluconic acid, salicylic acid, molasses, glucose, sucrose, maltose, starch, dextrin, calcium lignosulfonate and sodium lignosulfonate, preferably one or two of gluconic acid and glucose;
the raw materials of the component B comprise polymer emulsion, a water reducing agent, an accelerating agent and a diluent; the total mass part of the raw material B is 100 parts, and the mass parts of the components are as follows:
Figure BSA0000208465330000041
preferably 82-85 parts of polymer emulsion, 6-8 parts of water reducing agent, 3-4 parts of accelerator and 6-8 parts of diluent;
the polymer emulsion improves the compressive strength and the toughness of a cementing material gel, has the functions of reducing the thickness of a guniting layer and preventing the guniting layer from falling off and cracking, and is selected from at least one of polyvinyl acetate emulsion, ethylene-vinyl acetate emulsion (VAE emulsion, EVA emulsion), polypropylene emulsion, acrylic emulsion and styrene-butadiene emulsion, preferably from one or two of EVA emulsion and polypropylene emulsion;
the addition of a proper amount of water reducing agent does not affect the compressive strength of the gelled body of the guniting material, and has the effect of improving the pumping performance of the guniting material slurry, wherein the water reducing agent is selected from at least one of naphthalene water reducing agents, aliphatic water reducing agents, sodium lignosulfonate water reducing agents, polycarboxylic acid water reducing agents and amino water reducing agents, and is preferably selected from one or two of naphthalene water reducing agents and aliphatic water reducing agents;
the quick-setting agent is selected from at least one of 82 quick-setting agents, 8880 type cement quick-setting agents, sodium silicate powder, potassium silicate powder, sodium hydroxide powder, calcium hydroxide powder, aluminum sulfate powder and lithium carbonate powder, and preferably at least one of 82 quick-setting agents, sodium silicate powder and aluminum sulfate powder;
the addition of a diluent selected from at least one of castor oil formate, ethyl acetate, propyl acetate, butyl acetate, ethylene glycol diacetate, tributyl citrate, and dioctyl phthalate, preferably at least one of ethyl acetate, propyl acetate, and butyl acetate, can reduce the initial viscosity of the guniting material slurry and improve the pumping performance.
A preparation method of a flexible spraying material for mine roadway support comprises the steps of mixing and stirring raw materials of a component A to obtain the component A; mixing the raw materials of the component B, and stirring to obtain a component B; when in use, the component A and the component B are mixed and stirred to obtain a flexible consolidation spraying material, wherein the mass part ratio of the component A to the component B is 1: 0.5-3; the preferred mass portion ratio is 1: 1-2.
The application of the flexible spraying material for mine roadway support is characterized in that the flexible spraying material is used for reinforcement, air leakage prevention, moisture prevention, gas leakage prevention and other treatment of the surface of surrounding rock of a mine roadway or the surface of a closed wall, and the specific method comprises the following steps:
(1) mixing material
And (3) adding the component A into a stirring bin of air pump spraying equipment, and then slowly adding the component B under stirring to prepare the slurry of the guniting material. The adding time of the component B is 3-5min, and the time is not too long, otherwise, the slurry becomes thick, and the pumping is influenced.
(2) Spraying ramming material
Starting a pump to pump, opening an air valve to atomize the slurry after the slurry at a discharge port is normally output, and spraying the slurry in a spray gun spiral mode at the spraying speed of 0.3-0.7m2Min, the spraying distance is 0.5-2m, and the thickness of each spraying is about 2-5 mm. After spraying for 30min, observing the surface dryness of the slurry, and if the surface is not sticky, carrying out the 2 nd spraying. During spraying construction, the spraying thickness is measured at any time in a whole-to-local spraying mode, and the spraying is supplemented at the position with insufficient thickness. Generally, the spraying is required to be carried out 2 to 3 times.
Compared with the prior art, the invention has the following beneficial effects:
(1) the prepared slag-based anchor-spraying support guniting material is an organic-inorganic hybrid material, has no volatilization of harmful substances, and is safe and environment-friendly;
(2) the slag is doped with the guniting material, so that the effective utilization of the slag is developed, the secondary pollution is relieved, and the cost is reduced;
(3) the spraying construction of the vertical surface and the top surface does not flow, the construction environment is friendly, and the problems of rebound and dust pollution are avoided;
(4) the curing time is proper, and the construction is simple and convenient and quick;
(5) the proper system viscosity enables the slurry to penetrate into the loose and broken gaps on the surface of the surrounding rock, and the surrounding rock is bonded into a whole in a high-strength manner by rapid consolidation, so that any loosening and breaking of the surface of the surrounding rock are prevented; the rapid compressive strength, the tensile strength, the bonding strength and the large compression deformation rate and the large tensile deformation rate are increased, and the problems of large thickness, easy falling, cracking and repeated maintenance of a guniting layer are solved. The method is particularly suitable for supporting reinforcement, wind leakage prevention and leakage prevention treatment of key underground or severe surrounding rock fragmentation positions;
(6) has low curing temperature and flame retardant property.
Detailed Description
For a further understanding of the invention, preferred embodiments of the invention are described below in conjunction with the specific embodiments.
Examples 1 to 5
The component A is prepared by uniformly stirring the fine aggregate, the slag powder, the cement-based cementing material, the reinforcing fiber, the accelerator and the retarder according to the mass parts listed in the following table 1 for later use.
TABLE 1
Figure BSA0000208465330000061
Figure BSA0000208465330000071
And uniformly stirring the polymer emulsion, the water reducing agent, the accelerating agent and the diluent in parts by weight listed in the following table 2 to obtain a component B for later use.
TABLE 2
Figure BSA0000208465330000072
According to the mass parts of the component A and the component B listed in the following table 3, the spraying construction is carried out at the position of the cracked airtight wall according to the application method provided by the invention, and the spraying speed is 0.5m2Min, spraying distance 2m, spraying thickness of 2-5mm each time, spraying frequency 2 times, spraying interval 30min, and performance index as listed in Table 3.
TABLE 3
Figure BSA0000208465330000073

Claims (10)

1. The utility model provides a flexible spraying material for mine tunnel supports which characterized in that: the flexible spraying material is an organic-inorganic composite material and comprises a component A and a component B, wherein the mass ratio of the component A to the component B is 1: 0.5-3;
the raw materials of the component A comprise fine aggregate, slag powder, a cement-based cementing material, reinforcing fiber, a speed-setting admixture and a retarder; the weight portion of the component A is 100, and the weight portion of each component is as follows:
Figure FSA0000208465320000011
the fine aggregate is at least one of quartz powder, fine sand, coal gangue, hydrated lime and talcum powder;
the slag powder is at least one of coal gangue, fly ash, lepidolite slag, kaolin slag, basalt slag, blast furnace iron slag, tin slag and tungsten slag;
the cement-based cementing material is at least one of sulphoaluminate cement, silicate cement, slag cement, fly ash cement, aluminate cement, ferro-aluminate cement, fluoroaluminate cement, phosphoaluminate cement and alunite cement;
the reinforced fiber is selected from at least one of polyethylene fiber, polyvinyl alcohol fiber, polypropylene fiber, aramid fiber, glass fiber and carbon fiber;
the accelerator is at least one selected from 82 accelerators, 8880 type cement accelerators, sodium silicate powder, potassium silicate powder, sodium hydroxide powder, calcium hydroxide powder, aluminum sulfate powder and lithium carbonate powder;
the retarder is selected from at least one of tartaric acid, citric acid, gluconic acid, salicylic acid, molasses, glucose, sucrose, maltose, starch, dextrin, calcium lignosulfonate and sodium lignosulfonate;
the raw materials of the component B comprise polymer emulsion, a water reducing agent, an accelerating agent and a diluent; the total weight of the raw material B is 100 parts, and the weight parts of the components are as follows:
Figure FSA0000208465320000021
the polymer emulsion is selected from at least one of polyvinyl acetate emulsion, ethylene-vinyl acetate emulsion (VAE emulsion, EVA emulsion), polypropylene emulsion, acrylic emulsion and butylbenzene emulsion;
the water reducing agent is selected from at least one of a naphthalene water reducing agent, an aliphatic water reducing agent, a sodium lignosulfonate water reducing agent, a polycarboxylic acid water reducing agent and an amino water reducing agent;
the accelerator is at least one selected from 82 accelerators, 8880 type cement accelerators, sodium silicate powder, potassium silicate powder, sodium hydroxide powder, calcium hydroxide powder, aluminum sulfate powder and lithium carbonate powder;
the diluent is at least one selected from castor oil formate, ethyl acetate, propyl acetate, butyl acetate, ethylene glycol diacetate, tributyl citrate and dioctyl phthalate.
2. The flexible gunning material for mine roadway support according to claim 1, wherein: the component A of the flexible spraying material comprises 24-28 parts of fine aggregate, 13-17 parts of slag powder, 50-58 parts of cement-based cementing material, 0.15-0.25 part of reinforcing fiber, 0.5-0.8 part of accelerator and 0.05-0.25 part of retarder.
3. The flexible gunning material for mine roadway support according to claim 1, wherein: the fine aggregate is powder with the particle size of less than 5mm, and the fine sand is river sand, cobble, mountain sand, cobble, sea sand or sea cobble.
4. The flexible gunning material for mine roadway support according to claim 1, wherein: the slag powder is selected from at least one of coal gangue, fly ash and lepidolite slag.
5. The flexible gunning material for mine roadway support according to claim 1, wherein: the cement-based cementing material is selected from one of sulphoaluminate cement and Portland cement.
6. The flexible gunning material for mine roadway support according to claim 1, wherein: the reinforcing fiber is selected from one or two of polyvinyl alcohol fiber and polypropylene fiber.
7. The flexible gunning material for mine roadway support according to claim 1, wherein: the accelerating agent is at least one selected from 82 accelerating agents, sodium silicate powder and aluminum sulfate powder.
8. The flexible gunning material for mine roadway support according to claim 1, wherein: the retarder is selected from one or two of gluconic acid and glucose.
9. A method for preparing the flexible spray material for mine roadway support according to claim 1, wherein the method comprises the following steps: mixing the raw materials of the component A, and stirring to obtain a component A; mixing the raw materials of the component B, and stirring to obtain a component B; when in use, the component A and the component B are mixed and stirred to obtain the flexible consolidation spraying material, wherein the mass part ratio of the component A to the component B is 1: 0.5-3.
10. The application of the flexible spraying material for mine roadway support is characterized in that:
(1) mixing material
Adding the component A into a stirring bin of air pump spraying equipment, and then slowly adding the component B under stirring to prepare slurry of the guniting material, wherein the adding time of the component B is 3-5 min;
(2) spraying ramming material
Starting a pump to pump, opening an air valve to atomize slurry after the slurry at a discharge port is output, and spraying the slurry in a spray gun spiral mode at a spraying speed of 0.3-0.7m2Min, the spraying distance is 0.5-2m, the spraying thickness is 2-5mm each time, and after spraying for 30min, the second spraying is carried out for 2-3 times.
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CN112142388A (en) * 2020-09-08 2020-12-29 内蒙古京润矿安科技有限公司 Novel tunnel plastic spraying material
CN112228101B (en) * 2020-09-28 2023-01-10 中煤科工开采研究院有限公司 Roadway support forming method and system based on spraying
CN112228101A (en) * 2020-09-28 2021-01-15 中煤科工开采研究院有限公司 Spraying-based roadway support forming method and system
CN113149544A (en) * 2021-03-13 2021-07-23 祎禾科技有限公司 Low-brittleness high-curing high-performance concrete spray slurry for coal mine tunnel and preparation method thereof
CN113213840A (en) * 2021-04-14 2021-08-06 河南省宜居建材科技有限公司 Novel tunnel guniting material and preparation method thereof
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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
CN115746599A (en) * 2022-12-21 2023-03-07 山西潞安晋安矿业工程有限责任公司 Bi-component inorganic thin spraying material for coal mine
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CN117024058A (en) * 2023-08-09 2023-11-10 山东安实绿色开采技术发展有限公司 Environment-friendly inorganic flexible composite material and preparation and use methods thereof

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