CN101619187B - Bolt net coal road spraying material - Google Patents
Bolt net coal road spraying material Download PDFInfo
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- CN101619187B CN101619187B CN2008101380036A CN200810138003A CN101619187B CN 101619187 B CN101619187 B CN 101619187B CN 2008101380036 A CN2008101380036 A CN 2008101380036A CN 200810138003 A CN200810138003 A CN 200810138003A CN 101619187 B CN101619187 B CN 101619187B
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Abstract
The invention relates to a bolt net coal road spraying material which is added with polyacrylate emulsion and modified on the basis of components such as cement, water reducing agent and accelerating agent. The spraying material can be separately added with 801 adherent and fly ash, silica powder and fly ash, and silica powder and sand for three different injection conditions, namely the normal enclosed environment, small water pouring environment and complicated geological structure environment of the coal road to increase the mechanical properties and using effects. The spraying material has high adhesive strength to the coal wall and the bolt net, high elongation ultimate, high tensile strength, low tensile elastic modulus, small shrinkage, much higher crack resistance, high permeability resistance and much higher compactibility, the spraying material can protect the internal bolt net from erosion and obviously slower the corrosive velocity; the spraying material has good ageing resistance and can reach the aim of delaying the corrosion of the bolt net and the coal wall. In addition, the spray layer is thin and uniform, the construction speed is quick, and the resilience rate, the dust concentration and the cost are low.
Description
Technical field
The present invention relates to mine laneway bolting and shotcreting field, particularly a kind ofly be suitable for the bolt net coal road spraying material that exploiting field, colliery coal road bolting with wire mesh prevents corrosion of metal anchors net and rib weathering.
Background technology
Along with the production technique fast development, coal road bolting with wire mesh total amount has accounted for 80% of coal mine support tunnel.At present, what exploiting field coal road bolting with wire mesh was adopted is to do spray conventional cement mortar or normal concrete, and its material is formed and proportioning is:
The material of conventional cement mortar is formed and proportioning is: cement: sand: accelerating chemicals: water reducer=1: 2～2.5: 0.03～0.05: 0.03～0.04.Water cement ratio 0.4～0.5.
The material of normal concrete is formed and proportioning is: cement: sand: stone: accelerating chemicals: water reducer=1: 2～2.5: 1～2: 0.02～0.03: 0.02～0.03.Water cement ratio 0.38～0.45.
Because underground air humidity and top board trickle, cause that metal anchors net and the corrosion of anchor pole exposed part are serious, the phenomenon of rib weathering.Because the rib weathering causes serious loosening, cause bolt supporting to lose efficacy tunnel wall caving roof fall.Not only influence ordinary production, and jeopardize personal security.
Summary of the invention
In order to overcome the deficiency that existing bolt net coal road anchor spray material can not solve exploiting field coal road metal anchors net corrosion, rib weathering problem, the invention provides a kind of bolt net coal road spraying material, it can improve the ability that prevents net corrosion of coal roadway support metal anchors and rib weathering greatly.
The present invention solves the problems of the technologies described above the technical scheme that is adopted to be:
The basal component of bolt net coal road spraying material has cement, water reducer, accelerating chemicals and polyacrylate dispersion; At three kinds of situations of coal road different condition, the component that increases on the basis of said components and the proportioning of each component are as follows:
1. when normally sealing, coal road increases by 801 glue, flyash in the component of spray material; The ratio of each component is:
Cement: polyacrylate dispersion: 801 glue: flyash: water reducer: accelerating chemicals=100: 3～5: 3～4: 8～10: 1.5～3: 1.5～3;
2. under the little trickle environment of coal road, increase silica flour, flyash in the component of spray material; The ratio of each component is:
Cement: polyacrylate dispersion: silica flour: flyash: water reducer: accelerating chemicals=100: 3～5: 2～3: 7～9: 1.5～3: 1.5～3;
3. under coal road tectonic structure complexcase, increase silica flour, sand in the component of spray material; The ratio of each component is:
Cement: polyacrylate dispersion: silica flour: water reducer: accelerating chemicals: sand=100: 3.5～5: 2.5～3: 1.5～3: 1.5～3: 5～10.
The invention has the beneficial effects as follows:
In cement material, increased polyacrylate dispersion to its modification, and, increased mechanical property and effect that materials such as 801 glue, silica flour, flyash change spray material at the different condition of exploiting field coal road; Problems such as the corrosion of coal road metal anchors net, coal road weathering have been solved effectively.Be in particular in:
1. the cohesive strength height improves more than 3 times with rib and reinforcing bar cohesive strength.Strong adhesion, density significantly improves.Impervious good, improve 1.5 times, water-intake rate reduced by 10 times in 2 days, the chloride-penetration resistance ability improves more than 8 times.Can prevent the coal seam weathering effectively, delay metal anchors net corrosion rate.
2. limit elongation big, can improve more than 2.45 times, tensile strength improves 40%.
3. tensile modulus of elasticity reduces greater than more than 37%.
4. shrink lessly, have good cracking resistance and deformation performance.
5. ability acidic chemical dielectric corrosion.
6. ageing resistance is good, and performance is with the ortho-water mortar.
7. nontoxic, free from environmental pollution, do not influence operator ' s health.Fire-retardant, antistatic, safety.
8. jetting thickness reduces greatly, reaches 2～5mm.Spray-up is even, complete.
9. adopt the slurries spraying, spraying rate is fast, springback capacity is little, no dust.Solved existing anchor spray technique rebound degree height, dust concentration is big, changes abominable construction environment greatly, reduces labor strength.
10. improve speed of application, significantly reduce cost, spray concrete and reduce more than 160 yuan for every meter.
Embodiment
The invention will be further described below in conjunction with embodiment.
One. the basic material of spray material is formed:
The basic material component and the proportioning of bolt net coal road spraying material are:
Cement: polyacrylate dispersion: water reducer: accelerating chemicals=100: 3～5: 1.5～3: 1.5～3.
Improve at different construction conditions, add other materials and improve result of use, specific as follows:
1. the normal closed spray material of coal road:
Coal road normal closed spray material in exploiting field increases by 801 glue, flyash on the basis of essentially consist material, to improve the cohesive strength and the slurries suspending power of material.Component and the proportioning of this moment are:
Cement: polyacrylate dispersion: 801 glue: flyash: water reducer: accelerating chemicals=100: 3～5: 3～4: 8～10: 1.5～3: 1.5～3.Water cement ratio=0.4～0.5.
Water cement ratio is meant the weight ratio of water and cement, is that the concentration of control spray material slurries is used.
Embodiment 1:
It is along the rectangle anchor net tunnel of 3 layers of coal top board driving that the belt lane is adopted in ore deposit, mining area, Yanzhou seven, designs clear span 4.6m, high 3.0m.The average thick 8.47m of coal.Directly the end is siltstone and alum clay matter mud stone, and grow in the crack, and horizontal stratification is arranged; The local growth in coal seam dirt band (carbonaceous mud stone), fragmentation; Coal seam false roof aplasia, directly the top is siltstone, mud stone, argillaceous agglutination, grow in the crack, and level and wavy bedding are more.
Adopt the component and the proportioning spraying of the exploiting field coal road spraying material of normal sealing, that is:
Cement: polyacrylate dispersion: 801 glue: flyash: water reducer: accelerating chemicals=100: 3.5: 3.5: 9: 2: 1.5.
Water cement ratio is 0.5, shotcrete thickness 3～4mm.
2. the spray material under the little trickle environment of coal road:
Spray material increases silica flour, flyash on the basis of essentially consist material under the little trickle environment of exploiting field coal road, to improve setting strength, rate of set and the slurries suspending power of material.Component and the proportioning of this moment are:
Cement: polyacrylate dispersion: silica flour: flyash: water reducer: accelerating chemicals=100: 3～5: 2～3: 7～9: 1.5～3: 1.5～3.Water cement ratio=0.35～0.5.
Embodiment 2:
06 quench road and middle coal road on ten exploiting fields 103, ore deposit, mining area, Yanzhou are the rectangle anchor net tunnels along seat earth driving on three.Design clear span 4.2m, high 3.2m.The coal mean thickness is 6.2m on three.Base plate is a sandstone in the canescence, hard and compact, hardness f=10; The siltstone alternating layers are ash～canescence, and oblique stratification and wavy oblique stratification are grown, hardness f=8; Directly the top is the Dark grey siltstone, and cranny development is relatively more broken, and with little trickle, hardness f=4～6.
Adopt the component and the proportioning spraying of spray material under the little trickle environment of coal road, that is:
Cement: polyacrylate dispersion: silica flour: flyash: water reducer: accelerating chemicals=100: 4: 2: 8: 3: 1.5.
Water cement ratio=0.35～0.5, jetting thickness 1.5～5mm.
3. the spray material under the coal road tectonic structure complexcase:
Under the coal road tectonic structure complexcase of exploiting field, spray material increases silica flour, fine sand on the basis of essentially consist material, and to improve setting strength, rate of set and the stowing capacity of material, component and the proportioning of this moment are:
Cement: polyacrylate dispersion: silica flour: water reducer: accelerating chemicals: sand=100: 3.5～5: 2.5～3: 1.5～3: 1.5～3: 5～10.
Embodiment 3:
Adopt the belt lane at seven of the foregoing description 1, promptly along in the rectangle anchor net tunnel of 3 layers of coal top board driving, part tunnel section is arranged, cranny development, roof cracking is serious, tomography is more, horizontal stratification and wavy bedding are more.Adopt component and proportioning spraying under the coal road tectonic structure complexcase, that is:
Cement: polyacrylate dispersion: silica flour: water reducer: accelerating chemicals: sand=100: 5: 2.5: 1.5: 3: 10.
Illustrate: 1. the present invention is particularly suitable for using in the coal road of exploiting field, and is available equally at other coal road.2. the foregoing description belongs to case, with coal road condition difference, can be as the case may be, and in corresponding three kinds of components and ratio range with it, make adjustment.3. under above-mentioned three kinds of conditions, feasible equally with the spray material construction of basic material component and proportioning, but effect is slightly inferior.
Two. the explanation of each component of spray material:
1. cement: can select the 525# ordinary Portland cement for use.
2. polyacrylate dispersion: be to form, and what adopt that special process and emulsifier special and auxiliary agent make is the emulsion of medium with water with acrylate, methacrylic ester copolymerization.
3. 801 glue: in acidic medium, form through amination again after the polycondensation by acid polyethylene and formaldehyde.Little yellow or water white transparency colloid; Nontoxic, tasteless, no burn into is pollution-free, do not fire, the intensity height.
801 glue have wear resistance and viscosity preferably.Adding 801 glue in spray material mainly is the sticking power that improves the spraying slurries, regulates spraying slurries viscosity, and the intensity when improving spray just reduces resilience.
4. silica flour: mix silica flour and have volcanic ash effect and micro aggregate effect, improve bleeding, cohesiveness and the flowability of the pore structure of material and density, slurries.Improve sprayed coating intensity; Anti-permeability performance is good, impact-resisting wear-resisting ability height, and anti-cavitation corrosion ability is strong, has anti-villaumite and sulphate corrosion ability, can suppress alkali-aggregate reaction; The spray-up height is closely knit, protects inner reinforcing bar chemical resistance of concrete, and corrosion rate is significantly slack-off.
5. flyash: mix the degree of compactness that flyash can improve spray-up, reduce the basicity of spray material, the resisting erosion of sulfate ability of concrete is improved greatly, alleviate the severe of slurries and the suction slurry ability of facility simultaneously.
Spraying equipment: adopt 1 of electronic grouting pump or pneumatic grouting pump.As: the electronic grouting pump of JZB-200/7 type, power 15kW, pressure 6MPa, slurry-outlet quantity 126L/min.Spice is with 2 of pneumatic agitation vats.
Working procedure:
1. be ready to spouting plant, material, geomantic omen pipe.Cable, pipeline are wrapped protection with plastic cloth.
2. stir spray material with pneumatic agitation vat by proportioning, reach the whitewashing standard-required.
3. start grouting pump, be that shotcrete machine is whitewashed.From a direction spray one time, spray again one time from other direction more earlier, the top can spray twice as required again, spray around rib crack and the wire netting evenly.Adhere to during whitewashing pushing up afterwards earlier and help, order is from the top down carried out.
Working order when 4. whitewashing: add water → air-supply and open mixing drum → material loading and prepare → open grouting pump → injection.Shut down: stop material → power failure → blowing-out → cut off the water.As the power failure blowing-out of Special Circumstances elder generation.
Claims (1)
1. bolt net coal road spraying material, its component contains cement, water reducer, accelerating chemicals and polyacrylate dispersion; At three kinds of situations of coal road different condition, the component that increases on the basis of said components and the proportioning of each component are as follows:
When normally sealing, coal road increases by 801 glue, flyash in the component of spray material; The ratio of each component is:
Cement: polyacrylate dispersion: 801 glue: flyash: water reducer: accelerating chemicals=100: 3～5: 3～4: 8～10: 1.5～3: 1.5～3;
Under the little trickle environment of coal road, increase silica flour, flyash in the component of spray material; The ratio of each component is:
Cement: polyacrylate dispersion: silica flour: flyash: water reducer: accelerating chemicals=100: 3～5: 2～3: 7～9: 1.5～3: 1.5～3;
Under coal road tectonic structure complexcase, increase silica flour, sand in the component of spray material; The ratio of each component is:
Cement: polyacrylate dispersion: silica flour: water reducer: accelerating chemicals: sand=100: 3.5～5: 2.5～3: 1.5～3: 1.5～3: 5～10.
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| Application Number | Priority Date | Filing Date | Title |
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| CN2008101380036A CN101619187B (en) | 2008-06-30 | 2008-06-30 | Bolt net coal road spraying material |
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| CN2008101380036A CN101619187B (en) | 2008-06-30 | 2008-06-30 | Bolt net coal road spraying material |
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| CN101619187B true CN101619187B (en) | 2011-08-03 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103693922A (en) * | 2013-09-16 | 2014-04-02 | 山东科技大学 | Mining spraying material formula and application method |
| CN110835250A (en) * | 2019-12-04 | 2020-02-25 | 山东科技大学 | Coating material for sealing coal wall along empty coal roadway |
Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102336555A (en) * | 2011-10-10 | 2012-02-01 | 扬州市航道管理处 | Modified polyester antirust coating for construction steel bars and construction method for modified polyester antirust coating |
| CN103664041A (en) * | 2012-09-26 | 2014-03-26 | 李昌军 | Preparation method of compound shotcrete admixture |
| CN103708782A (en) * | 2013-12-21 | 2014-04-09 | 兖州煤业股份有限公司 | Concrete guniting material |
| CN104693911A (en) * | 2015-02-09 | 2015-06-10 | 山西誉邦科技有限公司 | Inorganic nano spraying material and preparation method thereof |
| CN104650664B (en) * | 2015-02-10 | 2017-07-04 | 山西大学 | A kind of mine laneway wall gas plugging coating |
| CN109608137A (en) * | 2019-01-07 | 2019-04-12 | 山东科技大学 | A kind of thin layer rock reinforcing material |
| CN113372068B (en) * | 2021-07-08 | 2022-12-02 | 华新超可隆新型建材科技(黄石)有限公司 | Cement-based anticorrosive spraying material applied to steel chimney and preparation method thereof |
Citations (1)
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| KR100816891B1 (en) * | 2006-12-29 | 2008-03-26 | 주식회사 이노넥스트 | Mineral micro putty and water soluble ceramic paint for improving porous structure of concrete surface and method coating concrete surface with mineral micro putty and water soluble ceramic paint |
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Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| KR100816891B1 (en) * | 2006-12-29 | 2008-03-26 | 주식회사 이노넥스트 | Mineral micro putty and water soluble ceramic paint for improving porous structure of concrete surface and method coating concrete surface with mineral micro putty and water soluble ceramic paint |
Non-Patent Citations (1)
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| 史新春等.遂道喷射混凝土施工的质量控制措施.《黑龙江交通科技》.2007,(第11期), * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103693922A (en) * | 2013-09-16 | 2014-04-02 | 山东科技大学 | Mining spraying material formula and application method |
| CN110835250A (en) * | 2019-12-04 | 2020-02-25 | 山东科技大学 | Coating material for sealing coal wall along empty coal roadway |
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| CN101619187A (en) | 2010-01-06 |
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