CN113800870A - High-toughness thin-spraying material for rapid sealing and reinforcing underground coal mine and using method thereof - Google Patents
High-toughness thin-spraying material for rapid sealing and reinforcing underground coal mine and using method thereof Download PDFInfo
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- 238000005507 spraying Methods 0.000 title claims abstract description 69
- 239000000463 material Substances 0.000 title claims abstract description 56
- 238000007789 sealing Methods 0.000 title claims abstract description 31
- 239000003245 coal Substances 0.000 title claims abstract description 28
- 230000003014 reinforcing effect Effects 0.000 title claims abstract description 20
- 238000000034 method Methods 0.000 title claims abstract description 17
- 238000003756 stirring Methods 0.000 claims abstract description 36
- 239000007921 spray Substances 0.000 claims abstract description 17
- 239000000843 powder Substances 0.000 claims abstract description 11
- 239000011398 Portland cement Substances 0.000 claims abstract description 9
- 239000011256 inorganic filler Substances 0.000 claims abstract description 9
- 229910003475 inorganic filler Inorganic materials 0.000 claims abstract description 9
- 239000012752 auxiliary agent Substances 0.000 claims abstract description 7
- 239000004568 cement Substances 0.000 claims abstract description 7
- 239000010440 gypsum Substances 0.000 claims abstract description 7
- 229910052602 gypsum Inorganic materials 0.000 claims abstract description 7
- 239000002952 polymeric resin Substances 0.000 claims abstract description 6
- 229920003002 synthetic resin Polymers 0.000 claims abstract description 6
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 10
- 230000002787 reinforcement Effects 0.000 claims description 9
- 239000002002 slurry Substances 0.000 claims description 8
- 239000003638 chemical reducing agent Substances 0.000 claims description 7
- 239000000839 emulsion Substances 0.000 claims description 6
- 239000002562 thickening agent Substances 0.000 claims description 6
- 239000000701 coagulant Substances 0.000 claims description 5
- 239000002270 dispersing agent Substances 0.000 claims description 5
- 239000007788 liquid Substances 0.000 claims description 4
- 229920001909 styrene-acrylic polymer Polymers 0.000 claims description 4
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 claims description 2
- 239000002174 Styrene-butadiene Substances 0.000 claims description 2
- MTAZNLWOLGHBHU-UHFFFAOYSA-N butadiene-styrene rubber Chemical compound C=CC=C.C=CC1=CC=CC=C1 MTAZNLWOLGHBHU-UHFFFAOYSA-N 0.000 claims description 2
- 229910052791 calcium Inorganic materials 0.000 claims description 2
- 239000011575 calcium Substances 0.000 claims description 2
- HDERJYVLTPVNRI-UHFFFAOYSA-N ethene;ethenyl acetate Chemical group C=C.CC(=O)OC=C HDERJYVLTPVNRI-UHFFFAOYSA-N 0.000 claims description 2
- 229920001038 ethylene copolymer Polymers 0.000 claims description 2
- 239000010881 fly ash Substances 0.000 claims description 2
- 229910021487 silica fume Inorganic materials 0.000 claims description 2
- 239000003469 silicate cement Substances 0.000 claims description 2
- 239000011115 styrene butadiene Substances 0.000 claims description 2
- 229920003048 styrene butadiene rubber Polymers 0.000 claims description 2
- 239000000853 adhesive Substances 0.000 claims 1
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- 230000000694 effects Effects 0.000 description 1
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- 238000006703 hydration reaction Methods 0.000 description 1
- 239000001866 hydroxypropyl methyl cellulose Substances 0.000 description 1
- 235000010979 hydroxypropyl methyl cellulose Nutrition 0.000 description 1
- 229920003088 hydroxypropyl methyl cellulose Polymers 0.000 description 1
- UFVKGYZPFZQRLF-UHFFFAOYSA-N hydroxypropyl methyl cellulose Chemical group OC1C(O)C(OC)OC(CO)C1OC1C(O)C(O)C(OC2C(C(O)C(OC3C(C(O)C(O)C(CO)O3)O)C(CO)O2)O)C(CO)O1 UFVKGYZPFZQRLF-UHFFFAOYSA-N 0.000 description 1
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- GCLGEJMYGQKIIW-UHFFFAOYSA-H sodium hexametaphosphate Chemical group [Na]OP1(=O)OP(=O)(O[Na])OP(=O)(O[Na])OP(=O)(O[Na])OP(=O)(O[Na])OP(=O)(O[Na])O1 GCLGEJMYGQKIIW-UHFFFAOYSA-H 0.000 description 1
- 235000019982 sodium hexametaphosphate Nutrition 0.000 description 1
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Classifications
-
- 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
- C04B28/14—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 calcium sulfate 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
-
- 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
- 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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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Structural Engineering (AREA)
- Architecture (AREA)
- Ceramic Engineering (AREA)
- Mining & Mineral Resources (AREA)
- Organic Chemistry (AREA)
- Inorganic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Civil Engineering (AREA)
- Materials Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- Nozzles (AREA)
- On-Site Construction Work That Accompanies The Preparation And Application Of Concrete (AREA)
Abstract
A high-toughness thin spray material for rapid sealing and reinforcing in a coal mine underground and a using method thereof belong to the technical field of sealing and reinforcing of coal mine roadways, and aim to provide a thin spray material which has the advantages of higher hardening speed, certain strength, better toughness, excellent ageing resistance and capability of reducing or avoiding rebound rate, wherein the thin spray material is composed of two components AB. The component A is a liquid material consisting of aqueous polymer resin, and the component B is a powder material consisting of portland cement, sulphoaluminate cement, gypsum, inorganic filler and functional auxiliary agent. When in use, A, B components are mixed on pneumatic spraying equipment according to the proportion, and the mixture can be sprayed on site after being uniformly mixed. The spraying equipment consists of a stirring barrel and a screw pump driven by high-pressure air, alternately works, and is finally sprayed out by a pneumatic nozzle. The thin spray material has excellent sealing performance, high strength and large deformation rate, can realize rapid solidification, and is safer, more convenient and more efficient in construction process.
Description
Technical Field
The invention belongs to the technical field of coal mine tunnel sealing reinforcement, and particularly relates to a high-toughness thin-spraying material for rapid sealing reinforcement of an underground coal mine and a using method thereof.
Background
The underground spraying technology for coal mine is to spray hydraulic binder such as concrete, fast hardening cement mortar and the like on the surface of the surrounding rock, seal the exposed surface of the surrounding rock in time, prevent air from entering, prevent the surrounding rock from deliquescing, weathering and loosening and prevent toxic gas such as gas from overflowing. In addition, the anchor rods, the metal mesh and the like are combined to form a three-dimensional net-shaped support, so that the self-supporting arch structure of the underground roadway is stabilized, and the reinforcing effect is achieved. However, the guniting material has the following problems during use:
(1) the dust is large, the rebound rate is high, and the quality control of the guniting material is unstable in the operation process;
(2) the conventional guniting thickness generally exceeds 10 centimeters, the dosage of guniting materials is large, the material cost and the labor cost are high, and the cost is high;
(3) the metal mesh and the guniting material have inconsistent deformability, and the surface of the concrete support is easy to crack;
(4) the bonding capability of the guniting material is low, and after the roadway is deformed and cracked, the guniting material on the surface is easy to loosen, large blocks fall off, and potential safety hazards exist;
(5) the conventional spraying material has slow hydration hardening speed, influences the construction progress and has untimely supporting and sealing effects.
Disclosure of Invention
The invention provides a high-toughness thin spraying material for rapid sealing and reinforcing in a coal mine and a using method thereof, aiming at the problems of the existing spraying material in the using process.
The invention adopts the following technical scheme:
a high-toughness thin spraying material for rapid sealing and reinforcing in a coal mine comprises A, B double components, wherein the component A is liquid waterborne polymer resin, the component B is a powder material, and the mass ratio of the component A to the component B is 0.8-1.5: 1.
Further, the component A comprises one or more of styrene-acrylic emulsion, vinyl acetate-ethylene copolymer emulsion and styrene-butadiene emulsion.
Further, the component B comprises Portland cement, sulphoaluminate cement, gypsum, an inorganic filler and a functional auxiliary agent in a weight ratio of 100:30:10-15:10-20: 8-12.
Further, the portland cement comprises any one of P.O.42.5, P.O.52.5 and P.O.62.5 ordinary portland cement.
Further, the inorganic filler comprises one or more of fly ash, silica fume and calcium powder.
Further, the functional auxiliary agent comprises a coagulant, a retarder, a thickener, a water reducing agent and a dispersant, and the weight ratio of the coagulant to the retarder to the thickener to the water reducing agent is 3-4:6-6.5:0.3-0.8:0.3-0.5: 1.5-2.
In the invention, the component A is a liquid material consisting of aqueous polymer resin, the solid content is 50-55%, the viscosity is 200-2000 mPa.s, the PH is 6-8.5, and the glass transition temperature is 5-20 ℃.
The thickening agent is hydroxypropyl methyl cellulose, the water reducing agent is a polycarboxylic acid water reducing agent, and the dispersing agent is sodium hexametaphosphate.
Preferably, the high-toughness thin spraying material for rapid sealing and reinforcing of the underground coal mine is prepared from the following components in parts by mass: the component A is a liquid material consisting of 164 parts of water-based polymer resin, and the component B is composed of 100 parts of portland cement, 30 parts of sulphoaluminate cement, 10 parts of gypsum, 12 parts of inorganic filler, 3.2 parts of a coagulant, 6.4 parts of a retarder, 0.4 part of a thickener, 0.3 part of a water reducing agent and 1.7 parts of a dispersing agent.
Preferably, the waterborne polymer resin is styrene-acrylic latex, the solid content is 55 +/-1 wt/%, the viscosity is 200-800 mPa.s, the pH is 8, and the glass transition temperature is 5 ℃.
A use method of a high-toughness thin spraying material for rapid sealing and reinforcing in a coal mine well comprises the following steps:
step one, preparing a component B: adding silicate cement, sulphoaluminate cement, gypsum and inorganic filler into a dry powder mixer in proportion, stirring for 1-2min, adding functional auxiliary agent in proportion, and fully stirring for 5-10min to obtain a powder material of the component B;
secondly, adding the component A into a spraying device, and starting to slowly stir;
thirdly, adding the component B into the spraying device while stirring, and after the component B is added, quickly stirring for 1-3min until the whole slurry is uniformly mixed;
fourthly, spraying and ramming: stopping stirring, spraying the slurry from the spraying device at a spraying distance of 1-2m, at a spraying speed of 12L/min or more, and at a primary spraying thickness of 3-5 mm.
Further, the spraying device comprises a stirring barrel, a screw pump and a spray gun, wherein the stirring barrel is positioned above the screw pump, the top end of the stirring barrel is provided with a pneumatic motor I, the pneumatic motor I is connected with a stirring rod, the bottom of the stirring barrel is provided with a feed opening, one end of the screw pump is provided with a gear box, one end of the gear box is provided with a pneumatic motor II, the pneumatic motor II is connected with the screw rod of the screw pump through a gear in the gear box, the top end of the gear box is provided with an air source triple piece, one end of the air source triple piece is connected with a high-pressure air source, the other end of the air source triple piece is connected with a manual reversing valve, the manual reversing valve is respectively connected with the pneumatic motor I and the pneumatic motor II through high-pressure air pipes, the top end of the screw pump is provided with a feed opening, the feed opening is connected with the feed opening of the stirring barrel, the other end of the screw pump is provided with a discharge opening, the discharge opening is connected with the spray gun through a delivery pipe, and the side direction of the spray gun is connected with high-pressure air through the high-pressure air pipe, the bottoms of the screw pump and the gear box are provided with bases.
The invention has the following beneficial effects:
the invention provides a high-toughness thin-spraying material for rapid sealing and reinforcing in a coal mine, and a preparation method and a use method thereof. The material has excellent performances of rapidness, sealing, water prevention, leakage prevention, reinforcement and the like, can replace inorganic brittle materials such as traditional quick-hardening cement mortar, quick-hardening concrete and the like, is more environment-friendly and efficient in use method, can still effectively act without cracking under the conditions of roadway stress cracking and anchor net bulge deformation after the material is sprayed and hardened, and improves the durability of sealing and reinforcement.
The preparation method of the material has the advantages of simple process, convenient and quick use and construction operation, miniaturized slurry spraying equipment, integrated functions of stirring, conveying and spraying of the feed liquid, and driving by adopting compressed air, and is safer and more efficient.
Compared with the prior art, the invention overcomes the defects of large consumption of traditional sprayed concrete materials, high rebound rate, high labor intensity, serious labor environmental pollution and the like, can solve and improve the stability of surrounding rocks of coal mine roadways, the later maintenance of the roadways, the sealing, the cracking and the gas leakage prevention, the reduction of the oxidized spontaneous combustion of coal beds, the labor force and the comprehensive cost, and has good economic benefit and huge application prospect.
Drawings
FIG. 1 is a schematic view of a spray coating device according to the present invention;
wherein: 1-an air supply triplet; 2-a manual reversing valve; 3-a pneumatic motor II; 4-a pneumatic motor I; 5-a gear box; 6-stirring barrel; 7-a feed opening; 8-screw pump; 9-a discharge hole; 10-a material conveying pipe; 11-a spray gun; 12-high pressure trachea; 13-base.
Detailed Description
Example 1, a preparation method of a high-toughness thin-spraying material for rapid sealing reinforcement in an underground coal mine comprises the following steps: the high-toughness thin spray material consists of A, B components; selecting styrene-acrylic latex for quantitatively subpackaging the component A; and the component B is prepared by weighing 100 parts of portland cement, 30 parts of sulphoaluminate cement, 10 parts of gypsum and 12 parts of inorganic filler according to the proportion, adding the mixture into a dry powder mixer, stirring for 1-2min, then adding 0.4 part of thickening agent, 3.2 parts of coagulant, 6.4 parts of retarder, 0.3 part of water reducing agent and 1.7 parts of dispersing agent, fully stirring for 5-10min, uniformly mixing, and quantitatively packaging.
Example 2-4 is a method for using a high-toughness thin-spraying material for rapid sealing and reinforcing in a coal mine.
In example 2, the weight ratio of the A, B two components is 0.8: 1, carrying out blended spraying on the spraying equipment disclosed by the invention. The blending time is less than 10 minutes, the spraying speed is 12L/min, the spraying distance is 1-2 meters, and the one-time spraying thickness is 3-5 millimeters.
Example 3, A, B the weight ratio of two components is 1.2: 1, carrying out blended spraying on the spraying equipment disclosed by the invention. The blending time is less than 10 minutes, the spraying speed is 12L/min, the spraying distance is 1-2 meters, and the one-time spraying thickness is 3-5 millimeters.
Example 4, A, B the weight ratio of two components is 1.5:1, carrying out blended spraying on the spraying equipment disclosed by the invention. The blending time is less than 10 minutes, the spraying speed is 12L/min, the spraying distance is 1-2 meters, and the one-time spraying thickness is 3-5 millimeters.
The materials of examples 2-4 were tested for open time, tensile strength, and maximum elongation after mixing, and the results are shown in Table 1:
TABLE 1 testing of Material Properties
| Sample (I) | Time to surface dry (min) | Tensile Strength (MPa) | Maximum delayElongation (%) |
| Example 2 | 12 | 11.88 | 10.85 |
| Example 3 | 27 | 6.24 | 28.62 |
| Example 4 | 45 | 4.85 | 46.14 |
As can be seen from Table 1, the AB component has certain difference in material properties under three selected blending ratios, and can be applied to different occasions under the well. In the embodiment 2, the material has higher hardening speed and tensile strength, and can be matched with an anchor rod and a metal mesh to realize the rapid reinforcement and support of underground surrounding rock; example 3, the plugging agent has moderate strength and deformation resistance, and can be used for plugging and preventing overflow of gas and grouting on the surface of underground surrounding rock; example 4, the large deformability of the material is suitable for the sealing requirements of the unstable large deformation region.
The screw pump 8 is arranged on the base 13, one end of the pump body is connected with the pneumatic motor II 3 for driving the screw to rotate, and the other end of the pump body is provided with a screw pump slurry discharge port 9 which is connected with the spray gun 11 through a conveying pipe 10; the screw pump feed inlet is connected with agitator feed opening 7, and agitator 6 adopts pneumatic motor I4 drive stirring. The two pneumatic motors are connected with a high-pressure air source through a manual reversing valve 2 and an air source triple piece 1, and can work alternately. The spray gun 11 is laterally supplied with high-pressure air.
The spraying device works by starting a high-pressure air source switch at a pneumatic motor II and a pneumatic motor I, manually adjusting a reversing valve 2 to a starting position of the pneumatic motor I4, starting the stirring barrel 6 to work, pouring the material A into the stirring barrel 6 according to the proportion in the embodiment 2-4, and slowly stirring. Then adding the component B, slowly adding the component B, and adding the component B while stirring until the component AB and the component AB are completely blended. And (3) manually adjusting the starting position of the reversing valve 2 to the pneumatic motor II 3, stopping the pneumatic motor I4, starting the pneumatic motor II 3 and driving the screw rod to start rotating. The uniformly mixed slurry is conveyed from a feed opening 7 of the stirring barrel by a screw, passes through a discharge opening 9, a conveying pipe 10 and reaches a spray gun 11. When slurry flows out from the nozzle, the high-pressure air pipe is connected, and the slurry is blown out by high-pressure air at the position of the gun head and is atomized and sprayed out from the nozzle.
The high-toughness thin-spraying material for rapid sealing and reinforcing in the underground coal mine consists of a liquid component and a solid powder component, and is directly mixed and sprayed on the device disclosed by the invention according to the proportion of the embodiment in use. The material has fast hardening after blending, high toughness, great deformation resistance, good strength, adhesion and sealing performance. The two components can be constructed in various proportions and applied to different use occasions for sealing and reinforcing underground coal mines. The whole construction equipment and process are efficient, convenient and fast, safe and reliable, fast in construction progress of workers and low in labor intensity, meet the requirements of current green, safe and efficient mine operation, and are ideal substitute products of traditional inorganic brittle spraying materials.
It should be understood, however, that the description herein of specific embodiments is not intended to limit the invention to the particular forms disclosed, but on the contrary, the intention is to cover all modifications, equivalents, and alternatives falling within the spirit and scope of the invention as defined by the appended claims.
Claims (8)
1. The high-toughness thin spraying material for the underground rapid airtight reinforcement of the coal mine is characterized in that: the adhesive comprises A, B double components, wherein the component A is liquid water-based polymer resin, the component B is powder material, and the mass ratio of the component A to the component B is 0.8-1.5: 1.
2. The high-toughness thin-spraying material for the underground rapid sealing and reinforcing of the coal mine according to claim 1, which is characterized in that: the component A comprises one or more of styrene-acrylic emulsion, vinyl acetate-ethylene copolymer emulsion and styrene-butadiene emulsion.
3. The high-toughness thin-spraying material for the underground rapid sealing and reinforcing of the coal mine according to claim 2, which is characterized in that: the component B comprises Portland cement, sulphoaluminate cement, gypsum, inorganic filler and a functional auxiliary agent in a weight ratio of 100:30:10-15:10-20: 8-12.
4. The high-toughness thin-spraying material for the underground rapid sealing and reinforcing of the coal mine according to claim 3, wherein the high-toughness thin-spraying material comprises the following components in percentage by weight: the Portland cement comprises any one of P.O.42.5, P.O.52.5 and P.O.62.5 ordinary Portland cement.
5. The high-toughness thin-spraying material for the underground rapid sealing and reinforcing of the coal mine according to claim 4, wherein the high-toughness thin-spraying material comprises the following components in percentage by weight: the inorganic filler comprises one or more of fly ash, silica fume and calcium powder.
6. The high-toughness thin-spraying material for the underground rapid sealing and reinforcing of the coal mine according to claim 5, wherein the high-toughness thin-spraying material comprises the following components in percentage by weight: the functional auxiliary agent comprises a coagulant, a retarder, a thickener, a water reducing agent and a dispersant in a weight ratio of 3-4:6-6.5:0.3-0.8:0.3-0.5: 1.5-2.
7. The use method of the high-toughness thin-spraying material for the rapid sealing and reinforcing of the underground coal mine according to any one of claims 1 to 6 is characterized by comprising the following steps: the method comprises the following steps:
step one, preparing a component B: adding silicate cement, sulphoaluminate cement, gypsum and inorganic filler into a dry powder mixer in proportion, stirring for 1-2min, adding functional auxiliary agent in proportion, and fully stirring for 5-10min to obtain a powder material of the component B;
secondly, adding the component A into a spraying device, and starting to slowly stir;
thirdly, adding the component B into the spraying device while stirring, and after the component B is added, quickly stirring for 1-3min until the whole slurry is uniformly mixed;
fourthly, spraying and ramming: stopping stirring, spraying the slurry from the spraying device at a spraying distance of 1-2m, at a spraying speed of 12L/min or more, and at a primary spraying thickness of 3-5 mm.
8. The use method of the high-toughness thin-spraying material for rapid sealing and reinforcing of the underground coal mine according to claim 7 is characterized in that: the spraying device comprises a stirring barrel, a screw pump and a spray gun, wherein the stirring barrel is positioned above the screw pump, the top end of the stirring barrel is provided with a pneumatic motor I, the pneumatic motor I is connected with a stirring rod, the bottom of the stirring barrel is provided with a feed opening, one end of the screw pump is provided with a gear box, one end of the gear box is provided with a pneumatic motor II, the pneumatic motor II is connected with a screw of the screw pump through a gear in the gear box, the top end of the gear box is provided with an air source triple piece, one end of the air source triple piece is connected with a high-pressure air source, the other end of the air source triple piece is connected with a manual reversing valve, the manual reversing valve is respectively connected with the pneumatic motor I and the pneumatic motor II through high-pressure air pipes, the top end of the screw pump is provided with a feed inlet, the feed inlet is connected with the feed opening of the stirring barrel, the other end of the screw pump is provided with a discharge opening, the discharge opening is connected with the spray gun through a delivery pipe, and the side direction of the spray gun is connected with high-pressure air through the high-pressure air pipe, the bottoms of the screw pump and the gear box are provided with bases.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114920534A (en) * | 2022-06-14 | 2022-08-19 | 渭南陕煤启辰科技有限公司 | Thin spraying material for roadway support sealing and use method thereof |
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| 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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| 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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Application publication date: 20211217 |