CN107522442A - A kind of mining gunite concrete and preparation method thereof - Google Patents
A kind of mining gunite concrete and preparation method thereof Download PDFInfo
- Publication number
- CN107522442A CN107522442A CN201710827532.6A CN201710827532A CN107522442A CN 107522442 A CN107522442 A CN 107522442A CN 201710827532 A CN201710827532 A CN 201710827532A CN 107522442 A CN107522442 A CN 107522442A
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- China
- Prior art keywords
- mining
- gunite concrete
- gunite
- rubble
- concrete
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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
- C04B28/02—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements containing hydraulic cements other than calcium sulfates
- C04B28/04—Portland cements
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/00034—Physico-chemical characteristics of the mixtures
- C04B2111/00146—Sprayable or pumpable mixtures
- C04B2111/00155—Sprayable, i.e. concrete-like, materials able to be shaped by spraying instead of by casting, e.g. gunite
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2201/00—Mortars, concrete or artificial stone characterised by specific physical values
- C04B2201/50—Mortars, concrete or artificial stone characterised by specific physical values for the mechanical strength
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Inorganic Chemistry (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
Abstract
The present invention provides a kind of mining gunite concrete and preparation method thereof, and the traditional dry spraying machine of materials'use can construct.Material is made up of cement, sand, rubble, polypropylene fibre, phenylpropyl alcohol re-dispersible glue powder, aluminum sulfate, sodium metasilicate etc..The problem of finished product plant produced, scene plus water can be used, and are not required to scene and add accelerator, avoid extemporaneous preparation, and proportioning fluctuation is big, and quality is unstable.Can solve conventional spray concrete springback rate height containing polypropylene fibre, phenylpropyl alcohol re-dispersible glue powder in material, the defects of cracking after solidification.Aluminum sulfate, sodium metasilicate, which are applied in combination, can ensure initial set in gunite material 5 minutes, final set in 8 minutes, and the construction reference requirement of gunite concrete is reached in setting time index.
Description
Technical field
The present invention relates to mining whitewashing, more particularly to a kind of mining gunite concrete and preparation method thereof.
Background technology
Domestic colliery is using the material of gunite concrete substantially with cement, sandstone, flyash and accelerator etc. by certain ratio
Example mix forms, with dry type pulp shooting machine sprayed construction.With the horizontal raising of coal mining, the problem of techmque is present, is main
Be embodied in it is following some：
（1）Sprayed coating ftractures, as down-hole pressure is increasing, in dynamic pressure（Or surge）In the presence of, lacking toughness
Being cracked often occurs in sprayed coating, bursts or phenomenon that monoblock comes off（Adopting region spraying layer concrete that dynamic pressure has a great influence
Degree of cracking is up to 50%）, supporting effect has been had a strong impact on, or even the major accident with facility damage that causes casualties.
（2）Delamination layer is sprayed, roadway whitewashing interface composition is complicated, and Gunning material and the adhesiveness at spraying interface are irregular not
Together, it is low plus existing gunning concrete modulus of elasticity, easily with spraying interfacial separation, delamination, directly affect supporting effect.
（3）Quality control is difficult, is limited by working environment at coal mines and operator quality, to existing Gunning material with when
Hybrid technique can not be implemented effectively to control, and sprayed coating quality is difficult to ensure that.
（4）Rebound degree is high, and dry spraying construction, material converges with water at ejiction opening, without stirring technique, the bonding of cement
Effect can not give full play to, and directly result in injection rebound degree and remain high, human and material resources waste serious.
（5）Compactness is poor, and existing Gunning material compactness in itself and barrier properties are poor, and current technique, which can only be used, thickeies spray
The method water-impervious of coating, has increased considerably roadway support cost.And the thickness of existing Gunning material spraying is thicker, fragility is also got over
Greatly, easier cracking, or even come off.
（6）Dust is big, conventional dry（Tide）Spraying construction operation dust is larger（Dust concentration is in 50~80 mg ∕ m3）, cement
Dust is a kind of very strong material of water imbibition, is not easily decomposed, is metabolized after suction lung, is the main reason for miner obtains lung silicon disease.
The content of the invention
The present invention be based on dry sprayig process improve, by cement, sand, rubble, polypropylene fibre, phenylpropyl alcohol re-dispersible glue powder,
The materials such as aluminum sulfate, sodium metasilicate, oxidation silicon seed are good in factory's hybrid process, form a kind of gunite material commodity, straight in underground
Connect and add water, can be used using existing equipment equipment.It can be very good to solve cracking, dust, resilience, proportioning do not reach requirement etc.
Problem, improve the operating environment of coal miner.
The present invention is achieved by the following technical solutions：
A kind of mining gunite concrete, include the component of following percetage by weight：
The general cement 20-30% of silicon 42.5, medium coarse sand 20-30%, rubble 40-60%, polypropylene fibre 0.1-1%, phenylpropyl alcohol are redispersible
Rubber powder 0.2-1%, aluminum sulfate 1-3%, sodium metasilicate 0.2-0.6%.
A kind of described mining gunite concrete, include 0.1-5% oxidation silicon seed.
Described medium coarse sand particle diameter is 0.5-5mm.
The particle diameter of described rubble is 2-6mm.
Described oxidation silicon seed is prepared by one of the following two kinds method：
A：Add using the mass percentage concentration that SiO2 is counted as 5-10% waterglass or sodium silicate solution in seed mixer, be then added dropwise
Concentration is that 0.1-5N inorganic acid solutions to pH value is 7-8, and filtering, washing after crystal seed ageing 1-20h completely after reaction, product is in perseverance
It is sealed after being dried in warm vacuum drying chamber, wherein 60-65 DEG C of drying temperature, drying time 2-5h；
B：Prodan slurry is added in seed mixer, it is reacted with ammonia spirit, mistake after crystal seed ageing 1-20h after reaction
Filter, washing, product are sealed after drying 2-5h in 60-65 DEG C of vacuum drying oven, wherein prodan slurry
Mass percentage concentration is 10-20%, and the mass percentage concentration of ammoniacal liquor is 10-20%, and both weight ratios are 1:（1-1.5）.
Described inorganic acid is one kind in sulfuric acid, hydrochloric acid, carbonic acid, nitric acid.
A kind of preparation method of described mining gunite concrete is：It will be remained after medium coarse sand, rubble drying process with other
Excess material is thoroughly mixed uniformly together, moisture barrier bag packaging, total weight parts 30-50% water is added during use, is stirred
Scene is applied after even.
The invention provides a kind of underground mine use gunite material, the traditional dry spraying machine of materials'use can construct.Material
It is made up of cement, sand, rubble, polypropylene fibre, phenylpropyl alcohol re-dispersible glue powder, aluminum sulfate, sodium metasilicate, oxidation silicon seed etc..Into
Product plant produced, scene plus water can be used, and are not required to scene and add accelerator, avoid extemporaneous preparation, proportioning fluctuation is big, quality
The problem of unstable.Can solve conventional spray concrete springback rate containing polypropylene fibre, phenylpropyl alcohol re-dispersible glue powder in material
Height, the defects of cracking after solidification；Oxidation silicon seed can promote aquation and the hardening of cement, may replace traditional accelerator, simultaneously
Further reaction generates silica in hydration process for it, promotes secondary hydration, further improves slurry internal stress,
Initial set in gunite material 5 minutes can be ensured by being applied in combination with aluminum sulfate, sodium metasilicate, final set in 8 minutes, be reached in setting time index
To the construction reference requirement of gunite concrete.It can meet coal mine underground construction in intensity index after obtained pulp jets hardening
It is required that rebound degree is effectively controlled.
Embodiment
Embodiment 1
A kind of mining gunite concrete, include the component of following percetage by weight：
The general cement 30% of silicon 42.5, medium coarse sand 25%, rubble 41%, polypropylene fibre 0.5%, phenylpropyl alcohol re-dispersible glue powder 0.4%, sulphur
Sour aluminium 2.6%, sodium metasilicate 0.5%.
A kind of preparation method of mining gunite concrete of the embodiment is：By after medium coarse sand, rubble drying process with its
Its leftover materials is thoroughly mixed uniformly together, moisture barrier bag packaging.Obtained materials application is constructed in coal mine down-hole tunnel
In, using 0.4:1 ratio of water to material, 1d compression strength >=7MPa, 3d compression strength >=30MPa, rebound degree are less than 12%.
Embodiment 2
A kind of mining gunite concrete, include the component of following percetage by weight：
The general cement 28% of silicon 42.5, medium coarse sand 25%, rubble 41%, polypropylene fibre 0.5%, phenylpropyl alcohol re-dispersible glue powder 0.4%, sulphur
Sour aluminium 2.6%, sodium metasilicate 0.5%, 2% aoxidize silicon seed.
Wherein oxidation silicon seed is prepared by the following method to obtain：
Added in seed mixer using the mass percentage concentration that SiO2 is counted as 8.5% water glass solution, it is 0.5N salt that concentration, which is then added dropwise,
Acid solution to pH value is 7.5, and filtering, washing after crystal seed ageing 15h, product are dried in vacuum drying oven completely after reaction
It is sealed after 3.5h, wherein 60-65 DEG C of drying temperature.
A kind of preparation method of mining gunite concrete of the embodiment is：By after medium coarse sand, rubble drying process with its
Its leftover materials is thoroughly mixed uniformly together, moisture barrier bag packaging.Obtained materials application is constructed in coal mine down-hole tunnel
In, using 0.5:1 ratio of water to material, 1d compression strength >=10MPa, 3d compression strength >=35MPa, rebound degree are less than 12%.
Claims (7)
1. a kind of mining gunite concrete, it is characterised in that include the component of following percetage by weight：
The general cement 20-30% of silicon 42.5, medium coarse sand 20-30%, rubble 40-60%, polypropylene fibre 0.1-1%, phenylpropyl alcohol are redispersible
Rubber powder 0.2-1%, aluminum sulfate 1-3%, sodium metasilicate 0.2-0.6%.
A kind of 2. mining gunite concrete as claimed in claim 1, it is characterised in that the oxidation silicon wafer also including 0.1-5%
Kind.
3. a kind of mining gunite concrete as claimed in claim 1, it is characterised in that described medium coarse sand particle diameter is 0.5-
5mm。
4. a kind of mining gunite concrete as claimed in claim 1, it is characterised in that the particle diameter of described rubble is 2-6mm.
5. a kind of mining gunite concrete as claimed in claim 2, it is characterised in that described oxidation silicon seed passes through as follows
One of two methods are prepared：
A：Added in seed mixer with SiO2The mass percentage concentration of meter is 5-10% waterglass or sodium silicate solution, is then added dropwise dense
It is 7-8 to spend for 0.1-5N inorganic acid solutions to pH value, and filtering, washing after crystal seed ageing 1-20h completely after reaction, product is in constant temperature
It is sealed after being dried in vacuum drying chamber, wherein 60-65 DEG C of drying temperature, drying time 2-5h；
B：Prodan slurry is added in seed mixer, it is reacted with ammonia spirit, mistake after crystal seed ageing 1-20h after reaction
Filter, washing, product are sealed after drying 2-5h in 60-65 DEG C of vacuum drying oven, wherein prodan slurry
Mass percentage concentration is 10-20%, and the mass percentage concentration of ammoniacal liquor is 10-20%, and both weight ratios are 1:（1-1.5）.
A kind of 6. mining gunite concrete as claimed in claim 5, it is characterised in that described inorganic acid be sulfuric acid, hydrochloric acid,
One kind in carbonic acid, nitric acid.
7. a kind of preparation method of mining gunite concrete as described in claim 1-6 is any is：Medium coarse sand, rubble are dried
It is thoroughly mixed after processing together with other leftover materials uniformly, moisture barrier bag packaging, adds total weight parts 30-50% during use
Water, be uniformly mixed after scene apply.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710827532.6A CN107522442A (en) | 2017-09-14 | 2017-09-14 | A kind of mining gunite concrete and preparation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710827532.6A CN107522442A (en) | 2017-09-14 | 2017-09-14 | A kind of mining gunite concrete and preparation method thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107522442A true CN107522442A (en) | 2017-12-29 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201710827532.6A Pending CN107522442A (en) | 2017-09-14 | 2017-09-14 | A kind of mining gunite concrete and preparation method thereof |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111217572A (en) * | 2020-02-25 | 2020-06-02 | 北京慕湖房地产开发股份有限公司 | Sprayed concrete containing high polymer modified fiber |
| CN111533519A (en) * | 2020-05-09 | 2020-08-14 | 赣州创可通科技有限公司 | Flexible spraying material for tunnel roadway support and preparation method and application thereof |
| CN111533518A (en) * | 2020-05-09 | 2020-08-14 | 赣州创可通科技有限公司 | Flexible spraying material for mine roadway support and preparation method and application thereof |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1276341A (en) * | 2000-06-13 | 2000-12-13 | 上海维来现代科技发展有限公司 | Process for preparing silica white using sodium fluorosilicate as raw material |
| US20030116063A1 (en) * | 2001-09-25 | 2003-06-26 | W.R. Grace & Co.-Conn. | Pumpably verifiable fluid fiber compositions |
| CN103693922A (en) * | 2013-09-16 | 2014-04-02 | 山东科技大学 | Mining spraying material formula and application method |
-
2017
- 2017-09-14 CN CN201710827532.6A patent/CN107522442A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1276341A (en) * | 2000-06-13 | 2000-12-13 | 上海维来现代科技发展有限公司 | Process for preparing silica white using sodium fluorosilicate as raw material |
| US20030116063A1 (en) * | 2001-09-25 | 2003-06-26 | W.R. Grace & Co.-Conn. | Pumpably verifiable fluid fiber compositions |
| CN103693922A (en) * | 2013-09-16 | 2014-04-02 | 山东科技大学 | Mining spraying material formula and application method |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111217572A (en) * | 2020-02-25 | 2020-06-02 | 北京慕湖房地产开发股份有限公司 | Sprayed concrete containing high polymer modified fiber |
| CN111217572B (en) * | 2020-02-25 | 2022-07-15 | 广州天达混凝土有限公司 | Sprayed concrete containing high polymer modified fiber |
| CN111533519A (en) * | 2020-05-09 | 2020-08-14 | 赣州创可通科技有限公司 | Flexible spraying material for tunnel roadway support and preparation method and application thereof |
| CN111533518A (en) * | 2020-05-09 | 2020-08-14 | 赣州创可通科技有限公司 | Flexible spraying material for mine roadway support and preparation method and application thereof |
| 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 |
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Application publication date: 20171229 |