CN109384447B - Powder curing agent for temporary road base in open-pit coal mine pit and use method thereof - Google Patents
Powder curing agent for temporary road base in open-pit coal mine pit and use method thereof Download PDFInfo
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- CN109384447B CN109384447B CN201811487367.5A CN201811487367A CN109384447B CN 109384447 B CN109384447 B CN 109384447B CN 201811487367 A CN201811487367 A CN 201811487367A CN 109384447 B CN109384447 B CN 109384447B
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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
- C04B28/24—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 alkyl, ammonium or metal silicates; containing silica sols
- C04B28/26—Silicates of the alkali metals
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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
- C04B2111/00017—Aspects relating to the protection of the environment
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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
- C04B2111/0075—Uses not provided for elsewhere in C04B2111/00 for road construction
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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)
- Road Paving Structures (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
Abstract
The invention discloses a curing agent for base powder of a temporary road in an open-air coal mine pit and a using method thereof, which are used for curing deep coal powder in the open-air coal mine pit and providing rigidity support for an upper precast slab of the temporary road. The curing agent consists of 70-90% of powder and 10-30% of liquid, wherein the powder consists of 15-30% of accelerating material, 20-60% of slag micropowder, 10-25% of pozzolanic material and 1-2% of surfactant; the liquid consists of 90-95% sodium water glass excitant and 5-10% polymer emulsion. The curing agent can fully cure the soft coal powder in the pit with less mixing amount, so that the soft coal powder can reach the base strength required by the specification, and the prefabricated slab on the upper layer is uniformly and reasonably stressed and can be normally used. The curing agent can keep the original properties of the pulverized coal, does not influence the re-exploitation and use of the cured pulverized coal, and has the advantages of rapid curing and convenient and rapid construction.
Description
Technical Field
The invention belongs to the field of road engineering, relates to a base course curing material, and particularly relates to a curing agent for base course coal bodies of temporary roads in open-air coal pits and a preparation method thereof.
Background
Coal is one of main energy sources in China, plays a great role in national economy, but can not avoid generating a large amount of dust in the process of mining and transporting of coal mines, particularly for the mining of open coal mines, the phenomenon of dust pollution is serious because the open operation is carried out and the surface of the exposed ground is continuously subjected to weathering erosion, and particularly for roads in pits, a large amount of dust accumulated on road surfaces seriously pollutes the environment and influences the normal development of field operation.
The road material in the pit is mainly coal, the road surface and the roadbed are soft, a large amount of fine dust is accumulated on the road in the pit under the rolling compaction of various coal transportation vehicles and equipment, and the dust thickness of the road in the pit even exceeds 200mm for some large opencast coal mines in northwest of China. Because the road powder accumulation particles in the pit are fine and the road surface is soft, the vehicle jolts in the transportation process of the vehicle, even the vehicle falls into the powder layer to cause accidents and casualties. Meanwhile, when a vehicle passes through or a strong wind passes through, a large amount of fine dust is raised along with the vehicle, serious dust raising hazards are generated, the field visibility is greatly reduced, and the road visibility in a part of large open pit is even less than five meters. The serious dust pollution condition of the road in the open pit seriously affects the normal construction progress on site, seriously threatens the physical and psychological health of the workers on site and accelerates the abrasion of equipment. And the road in the pit is positioned in the mining area and only serves as a temporary road, the use condition of the road is continuously changed along with the advance of the mining progress, and some road sections even only use for a plurality of days to serve as the mining area for continuous mining.
Aiming at the characteristics of temporary property, thick accumulated powder and the like of roads in open pit, the subject group invents a safe, quick and effective method for paving temporary roads in coal pit by prefabricated plates, the construction period is short, the prefabricated plates can be disassembled for recycling, and the serious dust hazard of the roads in pit can be effectively solved. The method comprises 5 procedures of prefabricated slab manufacturing, bottom surface oiling, dust layer cleaning and stirring, dust slurry solidification, prefabricated slab section laying, slab joint grouting and the like. The dust slurry solidification process is very important, because if the pavement slab is directly paved, the coal seam does not have good bearing capacity, the traveling load is too large, the stress of the slab surface is uneven, the defects of cracks, staggered platforms on the pavement and the like are easily generated, the prefabricated slab is finally broken, the great waste is caused, and the construction cost and the construction period are increased.
At present, the base course commonly used for roads comprises several types of lime stabilized soil base courses, cement stabilized soil base courses, lime fly ash stabilized soil base courses, graded broken stone base courses, graded gravel base courses and the like, a large amount of cement, lime, gravel and other materials need to be doped in the construction of the base courses, and the proportion of original soil in the base course materials is small. If a large amount of pulverized coal accumulated on the surface layer of a road in an open-pit coal mine pit is solidified by adopting a traditional basic layer treatment mode, a large amount of external materials are required to be doped, so that on one hand, the cost is too high, on the other hand, the large amount of external materials are mixed to seriously influence the re-mining and use of the pulverized coal in a solidified area, and the traditional basic layer treatment measures are obviously not suitable for building the road in the open-pit coal mine pit, so that the basic layer powder solidified material which is economic and efficient and can not influence the secondary mining of the pulverized coal is urgently needed.
Disclosure of Invention
The curing agent can generate a series of physical and chemical actions with fine powder, has more remarkable effect than the effect of curing the pulverized coal by using the traditional materials such as cement paste, bentonite, lime soil and the like, can fully cure loose pulverized coal under a small mixing amount, ensures that the loose pulverized coal meets the strength required by a road base layer, does not change the original attribute of the pulverized coal, takes the pulverized coal as a main body of the curing base layer, does not influence the re-mining and use of the pulverized coal in a reinforcing area, has low cost, and can bring higher economic and ecological benefits.
In order to achieve the above object, the technical solution of the present invention includes: a curing agent for powder of a temporary road base in an open-pit coal mine pit is characterized in that: the curing agent (by mass fraction) consists of 70-90% of powder and 10-30% of liquid;
the powder comprises the following components in percentage by mass: 15% -30% of a coagulation promoting material, 20% -60% of slag micropowder, 10% -25% of a pozzolanic material and 1% -2% of a surfactant;
the liquid agent comprises the following components in percentage by mass: 90% -95% sodium water glass excitant and 5% -10% polymer emulsion.
The invention relates to an optimization scheme of a temporary road base powder curing agent in an open-pit coal mine pit, which comprises the following steps: : the coagulation accelerator in the powder is a mixed component of anhydrous sodium silicate and a calcium cementing material, and the mass ratio of the anhydrous sodium silicate to the calcium cementing material is 1: 1, wherein the calcareous gelling material is one of portland cement, hydrated lime or calcium carbide mud.
The invention relates to an optimization scheme of a temporary road base powder curing agent in an open-pit coal mine pit, which comprises the following steps: the powder is prepared fromThe mineral powder micro powder in the agent is S95 level granulated blast furnace slag micro powder which meets the GB/T18046-2008 standard regulation, and the granulated blast furnace slag is subjected to magnetic separation and iron removal treatment and is ground to ensure that the specific surface area is more than or equal to 400 m2The superfine slag powder is prepared by per kg, wherein the superfine slag powder with the particle size of less than 30 mu m accounts for more than 90 percent of the total mass.
The invention relates to an optimization scheme of a temporary road base powder curing agent in an open-pit coal mine pit, which comprises the following steps: the ash material of the volcanic ash in the powder is silica fume, metakaolin or high-quality fly ash with higher volcanic ash activity.
The invention relates to an optimization scheme of a temporary road base powder curing agent in an open-pit coal mine pit, which comprises the following steps: the surfactant in the powder is one of naphthalene series, aliphatic series and polycarboxylic acid high-efficiency water reducing agents.
The invention relates to an optimization scheme of a temporary road base powder curing agent in an open-pit coal mine pit, which comprises the following steps: the sodium silicate excitant in the liquid is sodium silicate which is adjusted by adding a proper amount of sodium hydroxide into high-modulus sodium silicate to ensure that the modulus is between 1.0 and 2.0 and the Baume degree is between 37 and 48 degrees.
The invention relates to an optimization scheme of a temporary road base powder curing agent in an open-pit coal mine pit, which comprises the following steps: the polymer emulsion in the liquid agent is non-reactive styrene-butadiene latex, acrylate emulsion, vinyl acetate emulsion or ethylene-vinyl acetate copolymer emulsion and the like.
The use method of the curing agent for the base powder of the temporary road in the open-pit coal mine pit comprises the following steps:
(1) preparing powder and liquid according to the proportion respectively;
(2) mixing the liquid agent and water according to a mass ratio of 1: 5, diluting in proportion;
(3) adding the powder into the diluted liquid, and stirring to obtain homogeneous slurry;
(1) and putting the coal powder and the homogeneous slurry into a stirring device according to the mass ratio of 1: 0.3-0.5, uniformly stirring, paving the mixture on the surface of the road, and leveling and curing to obtain the temporary road base layer in the coal mine pit.
The curing agent for the temporary road base in the open-pit coal mine pit has the following beneficial characteristics:
(1) the effect of curing the coal powder is obvious
The curing agent slurry can generate a series of physical and chemical actions with fine powder, has good curing effect, and can fully cure loose coal powder with less mixing amount to ensure that the loose coal powder can reach the base strength meeting engineering requirements.
(2) Does not affect the re-mining use of the coal dust
The curing agent can fully cure loose coal dust with less mixing amount, so that the loose coal dust can reach the strength meeting the requirement of the road base layer, the original attribute of the coal dust is not changed, the cured base layer takes the coal dust as a main body, and the coal dust in a reinforced area can not be influenced for re-mining and using.
(3) Quick curing and short construction period
The curing agent slurry can be cured by powder after being stirred with the powder for several hours, and has the advantages of high strength, short construction period and good economic benefit.
(4) Convenient and fast to use
The curing agent only needs to uniformly mix two groups of effective components, when in use, only needs to uniformly mix and stir the road powder and the curing slurry by using a simple stirring device for paving, does not need additional special equipment and configuration condition requirements, has low requirements on constructors, and is convenient for site construction when being prepared.
(5) Environment protection and no pollution
Meanwhile, the invention is composed of nontoxic and harmless raw materials, does not harm the environment, contains solid waste components, saves resources, protects the environment and can bring good ecological and economic benefits.
Detailed Description
The present invention will be further described with reference to the following examples.
Example 1
The curing agent for the powder of the temporary road base in the open-air coal mine pit consists of powder and liquid, wherein the powder is used as a main component in a larger proportion.
The powder consists of a coagulation promoting material, slag micropowder, a pozzolanic material and a surfactant; the mass percentage of each component is as follows:
the coagulation accelerating material is 15% and consists of anhydrous sodium silicate and carbide mud, and the mass ratio of the anhydrous sodium silicate to the carbide mud is 1: 1.
60% of the slag micro powder is S95-grade granulated blast furnace slag micro powder which meets the GB/T18046-2008 standard regulation, and the slag micro powder is prepared by carrying out magnetic separation and iron removal on granulated blast furnace slag and grinding the granulated blast furnace slag to ensure that the specific surface area is more than or equal to 400 m2/kg, wherein the ultrafine granulated blast furnace slag micro powder with the particle size of less than 30 mu m accounts for more than 90% of the total mass.
20% of the volcanic ash material is selected from silica fume.
5 percent of the surfactant is selected from naphthalene series.
The liquid consists of a sodium silicate excitant and a polymer emulsion, and comprises the following components in percentage by mass:
95 percent of the sodium silicate excitant is sodium silicate which is adjusted by adding a proper amount of sodium hydroxide into high-modulus water glass to ensure that the modulus is between 1.0 and 2.0 and the baume degree is between 37 and 48 degrees.
And 5% of the polymer emulsion is non-reactive styrene-butadiene latex.
When in use, the liquid agent and the water are mixed according to the mass ratio of 1: 5, uniformly mixing the powder and the liquid according to a mass ratio of 7:3, and mixing the coal powder and the mixed slurry according to a mass ratio of 1: 0.5, stirring evenly and spreading to obtain the finished product.
The preparation method of the temporary road base powder curing agent in the open-pit coal mine pit comprises the following steps:
(1) preparing powder and liquid according to the proportion respectively;
(2) diluting the liquid agent with water;
(2) adding the powder into the diluted liquid, and stirring to obtain uniform slurry;
(3) and mixing and stirring the slurry spray and the coal powder, and paving the pavement.
Example 2
Essentially the same as in example 1, except that:
the powder comprises the following components in percentage by mass: wherein, 20% of the coagulation promoting material; 60% of slag micropowder; 19% of volcanic ash material, namely metakaolin; 1% of surfactant is aliphatic.
The liquid agent comprises the following components in percentage by mass: wherein, 90% of sodium silicate excitant; and 10% of polymer emulsion is acrylate emulsion.
Example 3
Essentially the same as in example 1, except that:
the powder comprises the following components in percentage by mass: accelerating material, 25%; 50% of slag micropowder; 24% of volcanic ash material, namely selecting fly ash; 1% of surfactant, which is a polycarboxylic acid high-efficiency water reducing agent.
The liquid agent comprises the following components in percentage by mass: 94% of sodium silicate excitant; and 6% of polymer emulsion which is vinyl acetate emulsion or ethylene-vinyl acetate copolymer emulsion.
The scope of the invention is not limited thereto, and the foregoing description and examples merely illustrate the principles of the invention and a specific example designed according to such principles, and are intended to cover such alternatives and modifications as may fall within the spirit and scope of the invention.
Claims (8)
1. A curing agent for powder of a temporary road base in an open-pit coal mine pit is characterized in that: the curing agent consists of 70-90% of powder and 10-30% of liquid by mass;
the powder consists of 15-30 percent of coagulation promoting material, 20-60 percent of slag micropowder, 10-25 percent of pozzolanic material and 1-2 percent of surfactant by mass fraction, and the sum of the contents of all the components is 100 percent;
the liquid agent consists of 90-95% of sodium water glass excitant and 5-10% of polymer emulsion by mass fraction.
2. The curing agent for powder of a base layer of a temporary road in an open-pit coal mine pit according to claim 1, wherein the curing agent comprises: the coagulation accelerator in the powder is a mixed component of anhydrous sodium silicate and a calcium cementing material, and the mass ratio of the anhydrous sodium silicate to the calcium cementing material is 1: 1, wherein the calcareous gelling material is one of portland cement, hydrated lime or calcium carbide mud.
3. The curing agent for powder of a base layer of a temporary road in an open-pit coal mine pit according to claim 1, wherein the curing agent comprises: the slag micro powder in the powder is S95-grade granulated blast furnace slag micro powder which meets the GB/T18046-2008 standard regulation, and the granulated blast furnace slag is subjected to magnetic separation and iron removal treatment and is ground to ensure that the specific surface area is more than or equal to 400 m2The superfine slag powder is prepared by per kg, wherein the superfine slag powder with the particle size of less than 30 mu m accounts for more than 90 percent of the total mass.
4. The curing agent for powder of a base layer of a temporary road in an open-pit coal mine pit according to claim 1, wherein the curing agent comprises: the ash material of the volcanic ash in the powder is silica fume, metakaolin or high-quality fly ash with higher volcanic ash activity.
5. The curing agent for powder of a base layer of a temporary road in an open-pit coal mine pit according to claim 1, wherein the curing agent comprises: the surfactant in the powder is one of naphthalene series, aliphatic series and polycarboxylic acid high-efficiency water reducing agents.
6. The curing agent for powder of a base layer of a temporary road in an open-pit coal mine pit according to claim 1, wherein the curing agent comprises: the sodium silicate excitant in the liquid is sodium silicate which is adjusted by adding a proper amount of sodium hydroxide into high-modulus sodium silicate to ensure that the modulus is between 1.0 and 2.0 and the Baume degree is between 37 and 48 degrees.
7. The curing agent for powder of a base layer of a temporary road in an open-pit coal mine pit according to claim 1, wherein the curing agent comprises: the polymer emulsion in the liquid agent is non-reactive styrene-butadiene latex, acrylate emulsion, vinyl acetate emulsion or ethylene-vinyl acetate copolymer emulsion.
8. The use method of the curing agent for the base layer powder of the temporary road in the open pit coal mine according to claim 1, wherein the curing agent comprises the following components in percentage by weight: the coal powder in the pit is solidified through the following steps:
preparing powder and liquid according to the proportion respectively;
mixing the liquid agent and water according to a mass ratio of 1: 5, diluting in proportion;
adding the powder into the diluted liquid, and stirring to obtain homogeneous slurry;
and putting the coal powder and the homogeneous slurry into a stirring device according to the mass ratio of 1: 0.3-0.5, uniformly stirring, paving the mixture on the surface of the road, and leveling and curing to obtain the temporary road base layer in the coal mine pit.
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| CN201811487367.5A CN109384447B (en) | 2018-12-06 | 2018-12-06 | Powder curing agent for temporary road base in open-pit coal mine pit and use method thereof |
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| CN201811487367.5A CN109384447B (en) | 2018-12-06 | 2018-12-06 | Powder curing agent for temporary road base in open-pit coal mine pit and use method thereof |
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| CN109384447B true CN109384447B (en) | 2020-11-20 |
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| CN114686239A (en) * | 2022-03-25 | 2022-07-01 | 山西路桥再生资源开发有限公司 | Coal-based solid waste soil curing agent and preparation method thereof |
| CN115362886B (en) * | 2022-08-25 | 2024-06-04 | 国家电投集团江西中业兴达电力实业有限公司 | Fly ash stacking dust-raising prevention method |
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| EP1801084A1 (en) * | 2005-12-20 | 2007-06-27 | Pavel Svoboda | Fly-ash concrete compositon, method of preparation by geo-polymeric reaction of activated fly-ash and its use. |
| CN102381863B (en) * | 2011-07-22 | 2013-05-08 | 广州市建筑科学研究院有限公司 | Non-cement-based inorganic anchoring bonded bar adhesive and preparation method thereof |
| CN102584165B (en) * | 2012-02-20 | 2013-08-21 | 天津市环境保护科学研究院 | Curing agent for curing/stabilizing silt (sludge) and soft foundation, and application thereof |
| CN103086620B (en) * | 2013-01-30 | 2014-09-10 | 中钢集团马鞍山矿山研究院有限公司 | Gelatinizing agent suitable for unclassified tailing filling |
| CN103693932A (en) * | 2013-12-17 | 2014-04-02 | 广西大学 | Geopolymer/waste rubber powder compound dry powder material and preparation method thereof |
| CN107285677A (en) * | 2017-08-09 | 2017-10-24 | 中国矿业大学 | Solidification CO is sealed up for safekeeping using foam geopolymer filling mine goaf2Method |
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