CN100591502C - Dry mixing gunite material in use for underworkings of coal mine, and preparation method - Google Patents
Dry mixing gunite material in use for underworkings of coal mine, and preparation method Download PDFInfo
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- CN100591502C CN100591502C CN200610044925A CN200610044925A CN100591502C CN 100591502 C CN100591502 C CN 100591502C CN 200610044925 A CN200610044925 A CN 200610044925A CN 200610044925 A CN200610044925 A CN 200610044925A CN 100591502 C CN100591502 C CN 100591502C
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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
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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
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/00241—Physical properties of the materials not provided for elsewhere in C04B2111/00
- C04B2111/00275—Materials impermeable to vapours or gases
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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
- 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
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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
- 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
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/40—Porous or lightweight 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
- C04B2111/70—Grouts, e.g. injection mixtures for cables for prestressed concrete
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Inorganic Chemistry (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Soil Conditioners And Soil-Stabilizing Materials (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
Abstract
The invention relates to a dry-mixed slurry spraying material used in coal mine laneway. It includes concrete, quartz sand or crushed sand, CaCO3, cellulose, and fiber. The feature is that concrete contains 100 portions, quartz sand or crushed sand contains 150-300portions, calcium carbonate is 0-50 portions, HPMC is 0.2-0.3 portions, polymer emulsion is 10-30 portions, polypropylene fiber is 0.1-0.2 portions, zinc fluosilicate is 5-10 portions, water reducing agent is 0.5-0.7 portions, and early strength agent is 0.2-0.3 portions. The method includes the following steps: weighing the raw material accurately, whisking in high efficiency blender for 20 minutes, mixing to equal and packaging. The invention has the advantages of light, high intension, high binding glue, inflaming, water proof, simple manufacturing technology, etc.
Description
Technical field
Dry mixing gunite material in use for underworkings of coal mine and preparation method the present invention relates under a kind of coal mine roadway construction with the preparing technical field of gunite material and this material.
Background technology
The nearly 30 years economic development of China obtains the achievement of attracting attention in the world, but the economy of high speed development is also increasing to the demand of the energy simultaneously.Domestic petroleum can not satisfy the economic development needs at present, and the exploitation that strengthens domestic reserves abundant in coal resource is a strategic state basic policy of present China.
For a long time, in the coal resources recovery process, the input proportion that safety in production facility and worker laboring environment improve measure is very little.Wherein the down-hole dust pollution is serious, and the down-hole dust is mainly from exploitation on-the-spot coal dust and the cement mortar dust that is used for the underworkings supporting.According to interrelated data, global pneumoconiosis patient, China has nearly just accounted for 1/2, and the pneumoconiosis patient of China, and coal miner accounts for wherein half again.The patient that the worker of China's coal-mine enterprise dies from pneumoconiosis every year is more than mine disaster and other industrial accidents 3 times.Therefore administer the down-hole dust pollution, ensure that the healthy of coal miner is the important matters of present safe producing coal.In addition, owing to rock drops in underworkings supporting mortar and the unstable China's mine laneway that causes of concrete quality, the part caves in, the tunnel is permeable and gas accident takes place again and again, give safety coal mining and ensure that the national economy high speed development energy hinders greatly with the ribbing, becomes the significant events that country needs solution badly.
The colliery underworkings be mine and the fortune coal must through the road, for guaranteeing the unimpeded and coal miner's in tunnel safety in production, must carry out supporting to the tunnel, generally be to adopt cement mortar or concrete that the tunnel rock surface is whitewashed, after the cement mortar solidification, play preventing rock falls, and prevent that ground water seepage from going into the tunnel, with the prevention gas leakage, beautify effects such as tunnel.The underworkings supporting gunite material of function admirable is significant for the down-hole coal excavation safety in production.
Domestic present colliery underworkings gunite material is that cement, sand, stone etc. are transported under the mine, on-the-spot doing mixed stirring, use pulp shooting machine then, adopt the wind-force mode of movement, at the muzzle place of pulp shooting machine, mix with water, be ejected on the aspect rock stratum after the exploitation, after cement material solidifies, play the effect of sealing supporting.
The present scene of all using, exploitation tunnel of the coal enterprises in China technology of gunite material that mixes cement.This on-the-spot dry stirring mode has following shortcoming:
1, at the underground mining scene, dry stirring cement sandstone, the pollution of dust such as cement sandstone is big, and is big to the health harm of field worker, the severe contamination subsurface environment;
2, the on-the-spot stirring, the noise that mixer produces is big, and is big to operating personnel's hearing harm;
3, the on-the-spot stirring, operating personnel are not easy the proportioning of strict control cement bonded sand stone etc., and are not strict to the quality control of gunite material, cause the hidden danger of quality accident easily; The poor adhesion of gunite material in addition is ejected into to be easy to generate behind the scar and lands material, causes a large amount of wastes, and general resilience is landed material and surpassed 30%; The performance of gunite material is single, can't accomplish to make gunite material to have high-adhesiveness, water proofing property, anti-cracking, reinforce supportive and one;
4, the on-the-spot stirring need take the place, tunnel of down-hole preciousness, and such as stacking cement, sandstone etc. influences drift section and transport the gap, influence the speed of application of coal mining main business, stops up the tunnel hidden danger that causes the accident easily;
5, Pen Jiang thickness requirement is thick, and generally at the 10-20 cm thick, it is poor to spray debanding, and resilience is big, and the material that lands is many, causes the gunite material waste serious, and mortar condenses slowly simultaneously, and the support action performance is slow.
6, after gunite material solidifies, because batching is single, rigid group is divided in the majority in the composition, material stiffness fragility is big, flexible not enough, along with the geological movement of underworkings or vibrations such as blow out in the exploitation once more, the as easy as rolling off a log cracking of traditional gunite material that causes comes off, then hidden danger such as further percolating water, gas overflow, the supporting mortar caves in may be caused, its due protective action can not be really played.
Summary of the invention
The technical problem to be solved in the present invention is: overcome the deficiencies in the prior art, a kind of low dust, the high viscosity that the colliery underworkings is used that be suitable for that need not mix stirring, no any dust and environmental pollution, guarantee workmen physical and mental health at the construction field (site), realize civilized construction is provided, overcomes existing traditional gunite material bad adhesion, resilience is big, the material that lands is many, easy to crack, do not possess the preparation method who mixes gunite material and do mixed gunite material that does of functions such as anti-seep water and anti-gas leakage.Fill up a blank of prior art.
The technical solution adopted for the present invention to solve the technical problems is: dry mixing gunite material in use for underworkings of coal mine, comprise cement, quartz sand or stone flour, calcium carbonate, cellulose ether, polypropylene fibre, and it is characterized in that: (parts by weight) are:
100 parts of cement
150～300 parts of quartz sand or stone flours
0～50 part of powdered whiting
0.2～0.3 part of hydroxypropyl methyl cellulose ether (HPMC)
10～20 parts of polymer dry breasts
0.1～0.2 part of polypropylene fibre
5～10 parts of zinc fluosilicates
0.5～0.7 part of water reducer
0.2～0.3 part of early strength agent
The polymer dry breast is the binary or the terpolymer of vinylacetate and tertiary ethylene carbonate or ethene or acrylate etc.
Water reducer is poly-naphthalene sulfonic acid-formaldehyde condensation product water reducer.
Polypropylene fibre is 0.5～1.0mm monofilament.
Early strength agent is polycarboxylic-acid early strength agent.
Quartz sand fineness 0.1～0.5mm contains mud below 1%.
Stone flour fineness 0.1～4.0mm, clay content is below 1%,
Doing the preparation method who mixes gunite material is: above-mentioned doing mixed gunite material, accurately after the weighing, fully stirred 20 minutes in the double-screw type High-efficient Stirrer, after mixing, quota is packaged into bag.Carrying quota packing (25 kilograms/bag) becomes bag to get final product for convenience.Can use the kraft paper bag that liner moulds or mould and compile the bag packing.
Compared with prior art, beneficial effect of the present invention: of the present invention do mixing in the whitewashing do not contain volatile toxic substance, has lightweight, high-strength, high cohesive force, fire-retardant, characteristics such as good, the easy construction of hollowing, anti-cracking, waterproof, shockproof, anti-gas leakage, workability not.Batching of the present invention is taked packed, plug and play, and wet method stirs in closed container, does not produce dust pollution, and operating personnel are not produced harm.
Simultaneously owing to do in the prescription that mixes gunite material new admixture component and given gunite material and can have following new function:
1, the cohesiveness of gunite material:
In doing mixed gunite material, add the cement highly efficient water reducer, play the minimizing water consumption, prevent the cement cracking, improve the effect of compression strength, added materials such as macromolecule polypropylene fiber simultaneously, improved the cohesiveness of gunite material, made gunite material self and firm with the bonding change of rock layer surface, be difficult for dispersing, be convenient to sprayed construction.
2, anti-gas water proofing property:
In prescription, waterproof material is introduced the dried gunite material that mixes, make gunite material have certain water resistance.In the dried side of being mixed, select polymer dry breast (Powdered) for use.This polymer dry breast can be when hydrated cementitious; in cement, form the membranaceous thing of macromolecule; play the effect that prevents cement-hydrate cracking and infiltration; the gunite material is not only played a supporting role; and play waterproofing protection and prevent effect such as gas leakage, this plays an important role and meaning to exploiting the anti-gas safety of on-the-spot enhancement of environment and the waterproof in the whole coal mine roadway.
3, strongly adherent:
Doing the dried breast of polymeric additive that mixes admixture in the gunite material is a kind of multipolarity organic material; have a large amount of polar functional group groups on its strand; these polar groups have extremely strong adhesion to rock layer surface; its adhesion strength is far longer than this inorganic coagulation material of cement; therefore adding this high molecular polymer additive in cement can make the adhesion strength of traditional inorganic cement gunite material be improved; the jail that gunite material combines with the rock stratum; supporting and protective effect to the rock stratum are big with regard to what bring into play, and its meaning is very important.
4, elasticity gunite material:
Traditional inorganic cement gunite material is inorganic matter fully, and is nonelastic after the sclerosis, closes with the rock layer surface scleroma, moves or mines when blowing out the generation vibrations with the earth's crust in the rock stratum, and gunite material can ftracture thereupon, caves in forfeiture supporting and protective effect; In this novel dried side of being mixed; the adding of high molecular polymer additive; make traditional inorganic cement gunite material change matter hard state in the past; become and have certain elasticity; this elasticity gunite material can change with the variation of rock stratum geology; remain the combination with rock layer surface, play supporting and protective effect all the time.
5, be fit to thin layer construction:
Tradition gunite material prescription is single, poor adhesion with rock, so need the enlarged in thickness of spraying, can effectively be bonded on the rock face, but this novel doing is mixed gunite material owing to include a large amount of activity and the organic polymer material of strong polar group, the adhesiveness of mortar is improved greatly, therefore, even only spray to a half thickness (general 5-8 cm thick) of traditional gunite material, also can effectively be bonded on the rock face, therefore, the novel also suitable thin layer construction mode of gunite material of mixing of doing, both but the economical with materials consumption used manpower and material resources sparingly; Can reduce the adverse effect that cost that the new material in the unit volume causes raises and brings again.
6, penetrant crystalline material:
In doing mixed gunite material, add active material--zinc fluosilicate, this active material can react with the hyrate of cement when hydrated cementitious, generate a kind of nano level crystalline material, this crystalline material can prolong rock crevice and fine crack permeates into, further expands, and plays to fill and stops up rock gap, prevent that rock fracture from further enlarging, cause the danger of landslide then easily.This active material need react having under the environment of water, and therefore, when in the rock crackle forming water being arranged, active material can react with water, consumes water, also plays the effect of waterproof and anti-gas.
7, the feature of environmental protection of gunite material:
Because prescription is selected poisonous and harmful substance and any radioactive substances such as not containing formaldehyde, organic solvent, benzene, dimethylbenzene for use, therefore, when using at the scene, this gunite material can not produce pollution and murder by poisoning to environment and operating personnel.
Low dust high-adhesive of the present invention is done and is mixed gunite material, and through Performance Detection, every index has all reached relevant national standard, and the result is as shown in table 1:
The low dust high-adhesive of table 1. is done and is mixed the whitewashing performance
Just mix when low dust high-adhesive dry-mixed mortar of the present invention dispatches from the factory, and quota is packaged into bag, need not to cooperate with other materials, be transported to the underground mining scene after, open bag and drop in the sealing pulp shooting machine, mix with water and promptly can be used for the tunnel injection.
Because each reasonable mixture ratio of components among the present invention is multiple functional, is the environment-friendly type gunite material of a kind of low dust high viscosity, nontoxic pollution-free.
The specific embodiment
Embodiment 1
With 100 parts of cement, 150 parts of quartz sands, 50 parts of powdered whitings, 0.3 part of HPMC, 20 parts of vinylacetates and ethylene copolymer are done breast, 0.2 part polypropylene fiber, 10 parts of zinc fluosilicates, 0.7 part of naphthalene water reducer, 0.3 part polyocarboxy acid type early strength agent fully stirred 20 minutes in the double-screw type High-efficient Stirrer, mixing and stirring adds suitable quantity of water again, mixes to get final product.
Embodiment 2
With 100 parts of cement, 200 parts of quartz sands, 40 parts of powdered whitings, 0.2 part of HPMC, 15 parts of vinylacetates and acrylate copolymer are done breast, 0.2 part polypropylene fiber, 10 parts of zinc fluosilicates, 0.6 part of naphthalene water reducer, 0.3 part polycarboxylic acids early strength agent fully stirred 20 minutes in the double-screw type High-efficient Stirrer, mixing and stirring adds suitable quantity of water again, mixes to get final product.
Embodiment 3
With 100 parts of cement, 250 parts of quartz sands, 30 parts of powdered whitings, 0.2 part of HPMC, 18 parts of vinylacetates and tertiary ethylene carbonate copolymer are done breast, 0.2 part polypropylene fiber, 7 parts of zinc fluosilicates, 0.6 part of naphthalene water reducer, 0.3 part polycarboxylic acids early strength agent fully stirred 20 minutes in the double-screw type High-efficient Stirrer, mixing and stirring adds suitable quantity of water again, mixes to get final product.
Embodiment 4
With 100 parts of cement, 200 parts of stone flours, 20 parts of powdered whitings, 0.2 part of HPMC, 10 parts of vinylacetates and methacrylate copolymer are done breast, 0.2 part polypropylene fiber, 6 parts of zinc fluosilicates, 0.5 part of naphthalene water reducer, 0.3 part polycarboxylic acids early strength agent fully stirred 20 minutes in the double-screw type High-efficient Stirrer, mixing and stirring adds suitable quantity of water again, mixes to get final product.
Embodiment 5
With 100 parts of cement, 300 parts of stone flours, 10 parts of powdered whitings, 0.2 part of HPMC, 20 parts of vinylacetates and acrylate copolymer are done breast, 0.2 part polypropylene fiber, 8 parts of zinc fluosilicates, 0.5 part of naphthalene water reducer, 0.2 part polycarboxylic acids early strength agent fully stirred 20 minutes in the double-screw type High-efficient Stirrer, mixing and stirring adds suitable quantity of water again, mixes to get final product.
Cement among the foregoing description 1-5 is meant: the cement of normal silicate 42.5R model;
Quartz sand: fineness 0.1～0.5mm contains mud below 1%;
Stone flour: fineness 0.1～4.0mm, clay content is below 1%;
Doing after the mixing and stirring mixed gunite material, and quota packing (25 kilograms/bag) becomes bag to get final product.Can use the kraft paper bag that liner moulds or mould and compile the bag packing.
Above-mentioned making do mixed gunite material and carried out performance test, and result data is as shown in table 2.
Table 2 embodiment does and mixes the gunite material The performance test results
| Embodiment | Compression strength MPa/28d | Rupture strength MPa/28d | Adhesive tensile resistance intensity MPa/28d |
| One | 34.97 | 6.86 | 1.45 |
| Two | 36.84 | 7.65 | 1.63 |
| Three | 37.06 | 7.14 | 1.57 |
| Four | 32.10 | 4.39 | 1.13 |
| Five | 31.08 | 4.66 | 1.27 |
When this novel dry mixing gunite material in use for underworkings of coal mine uses, can transport a certain amount of packed dried gunite material that mixes in advance and deposit in advance according to the digging progress of underworkings to the appointed place.Pulp shooting machine adopts new screw formula wet method whitewashing machinery, this screw pulp shooting machine adopts and earlier dry-mixed mortar is mixed according to a certain percentage with water, become wet mortar, wet mortar enters in the worm propeller of lower floor then, advances through screw rod, enters the whitewashing pipeline, can effectively carry 40 meters distances far away, the outlet of whitewashing pipeline is a spray gun, and the spray gun exit is connected with airduct, adopts wind-force that wet mortar is ejected into rock scar sealing supporting.
Owing to adopt this wet mixing mode and wet spraying process, on-the-spot whipping process does not produce dust pollution, can not bring harm to operating personnel, the construction environment security civilization.
Claims (6)
1, dry mixing gunite material in use for underworkings of coal mine comprises cement, quartz sand or stone flour, calcium carbonate, cellulose ether, polypropylene fibre, it is characterized in that: (parts by weight) are:
100 parts of cement
150～300 parts of quartz sand or stone flours
0～50 part of powdered whiting
0.2～0.3 part of hydroxypropyl methyl cellulose ether (HPMC)
10～20 parts of polymer dry breasts
0.1～0.2 part of polypropylene fibre
5～10 parts of zinc fluosilicates
0.5～0.7 part of water reducer
0.2～0.3 part of early strength agent;
Described polymer dry breast is the bipolymer of vinylacetate and tertiary ethylene carbonate or ethene or acrylate or methacrylate.
2, gunite material according to claim 1 is characterized in that: described water reducer is poly-naphthalene sulfonic acid-formaldehyde condensation product water reducer.
3, gunite material according to claim 1 is characterized in that: described polypropylene fibre is 0.5～1.0mm monofilament.
4. gunite material according to claim 1 is characterized in that: described early strength agent is polycarboxylic-acid early strength agent.
5, gunite material according to claim 1 is characterized in that: described quartz sand fineness 0.1～0.5mm contains mud below 1%.
6, gunite material according to claim 1 is characterized in that: described stone flour fineness 0.1～4.0mm, clay content is below 1%.
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| Application Number | Priority Date | Filing Date | Title |
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| CN200610044925A CN100591502C (en) | 2006-06-19 | 2006-06-19 | Dry mixing gunite material in use for underworkings of coal mine, and preparation method |
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| CN200610044925A CN100591502C (en) | 2006-06-19 | 2006-06-19 | Dry mixing gunite material in use for underworkings of coal mine, and preparation method |
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| CN100591502C true CN100591502C (en) | 2010-02-24 |
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| CN101921083B (en) * | 2010-08-19 | 2012-11-14 | 上海固佳化工科技有限公司 | Ester-ether mixed ultra high early strength poly-carboxylic high-performance water reducer and preparation method thereof |
| AU2014200344B2 (en) * | 2013-02-05 | 2017-03-02 | Promat Research and Technology Centre NV | Fire Protection Mortar |
| CN103244148B (en) * | 2013-05-15 | 2015-09-02 | 淄博矿业集团有限责任公司 | A kind of coal mine wet shotcreting process |
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| CN108609954B (en) * | 2018-05-21 | 2020-07-31 | 水利部交通运输部国家能源局南京水利科学研究院 | Low-viscosity anti-cracking high-strength wet-sprayed concrete and preparation method thereof |
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| CN109721301A (en) * | 2018-12-18 | 2019-05-07 | 山西晟坤科技发展有限公司 | A kind of dry-mixed gunite material |
| CN110540395A (en) * | 2019-09-26 | 2019-12-06 | 张园月 | Spraying material for coal mine underground roadway and preparation method |
| CN111056804A (en) * | 2020-01-20 | 2020-04-24 | 河南中煤矿业科技发展有限公司 | Manufacturing method and construction method of underground thin gunning material of coal mine and pneumatic guniting device |
| CN111255485A (en) * | 2020-03-03 | 2020-06-09 | 中煤科工集团重庆研究院有限公司 | Deep well roadway supporting structure and construction method |
| CN111533506A (en) * | 2020-04-17 | 2020-08-14 | 广东复特新型材料科技有限公司 | Anti-crack waterproof thermal insulation polymer mortar |
| CN111533519B (en) * | 2020-05-09 | 2022-05-24 | 赣州创可通科技有限公司 | Flexible spraying material for tunnel roadway support and preparation method and application thereof |
| CN111533518B (en) * | 2020-05-09 | 2022-05-24 | 赣州创可通科技有限公司 | Flexible spraying material for mine roadway support and preparation method and application thereof |
| CN112069957B (en) * | 2020-08-27 | 2024-01-12 | 五邑大学 | Collapse monitoring system, collapse monitoring method, collapse control device and storage medium |
| CN112830746A (en) * | 2021-03-17 | 2021-05-25 | 煤炭科学技术研究院有限公司 | Ultrahigh-performance roadway guniting material and construction 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 |
| CN115557762B (en) * | 2022-10-13 | 2023-06-16 | 太原理工大学 | Flame-retardant, air-leakage-resistant, static, non-reactive and environment-friendly sealing and reinforcing composite thin spray material |
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| KR20030065661A (en) * | 2002-01-30 | 2003-08-09 | 삼성물산 주식회사 | high-strength shotcrete composite using alkali-free accelerator |
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- 2006-06-19 CN CN200610044925A patent/CN100591502C/en not_active Expired - Fee Related
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20030065661A (en) * | 2002-01-30 | 2003-08-09 | 삼성물산 주식회사 | high-strength shotcrete composite using alkali-free accelerator |
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