CN104230263A - Method for manufacturing underground coal mine support rod - Google Patents
Method for manufacturing underground coal mine support rod Download PDFInfo
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- CN104230263A CN104230263A CN201410439670.3A CN201410439670A CN104230263A CN 104230263 A CN104230263 A CN 104230263A CN 201410439670 A CN201410439670 A CN 201410439670A CN 104230263 A CN104230263 A CN 104230263A
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- cement
- steel pipe
- coal mine
- underground coal
- based material
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/50—Reuse, recycling or recovery technologies
- Y02W30/91—Use of waste materials as fillers for mortars or concrete
Abstract
The invention discloses a method for preparing an underground coal mine support rod by using a cement-based constrained material. The method comprises the step of preparing the underground coal mine support through gravity casting vibratory compaction and high-temperature maintenance by taking a hollow steel pipe as a constraining body and taking a high-rheology micro-expansible cement-based material as a filling material, wherein the high-rheology micro-expansible cement-based material is prepared from the following raw materials in weight ratio or volume ratio: 10-20% of cement, 20-50% of calcined coal gangue slag ultrafine powder, 3-5% of styrene-acrylic emulsion, 1-5% of polypropylene fiber, 1-3% of zinc hydroxide, 1-3% of polycarboxylate superplasticizer, 3-8% of anhydrous sodium sulphate, 10-20% of waste clay brick particles (1-5mm), 20-40% of sintered ceramsites (5-10mm) and a proper amount of water. The method disclosed by the invention is capable of satisfying the special requirements of light weight, high strength, high toughness, fire resistance and corrosion resistance of the underground coal mine support rod and turning harm into good by utilizing industrial residues, and is flexible in material selection, high in product strength, simple to operate, short in time, low in production cost and easy for large-scale industrial production.
Description
Technical field
The present invention relates to a kind of method utilizing cement based constraint material to prepare underground coal mine support bar, relate in particular to a kind of high tenacity, cement-based material high compressive strength and cement-based material high compactness that aquation produces in steel tube confinement environment utilizing steel pipe, preparation lightweight, high-strength, fire-resistant, anti-corrosion underground coal mine support component method, be also applicable to prepare other constraint material goods etc.Belong to field of civil engineering, be mainly used in colliery mining operation.
Background technology
Underground coal mine inclement condition, even there is gas explosion in high temperature, humidity, requires comparatively harsh, both required high ultimate compression strength, and required again high folding strength digging bearing surface propping material, to its fire prevention, anti-corrosionly also to have higher requirements.Cement-based material can intensity high, high-temperature behavior good, but folding strength is low; Steel pipe High anti bending strength, but supporting role is lost to deform in High Voltage or fire hazard environment.Cement-based material is poured in steel pipe, cement-based material is aquation under the constraint of steel pipe, form high compactness inorganic metal matrix material, the requirement of underground coal mine severe rugged environment to propping material can be met, simple to operate, take a short time, production cost is low, has application prospect more widely.
Summary of the invention
For obtaining the support bar meeting above-mentioned condition, what the present invention taked is take hollow steel tube as obligatory point, become micro-expansibility cement-based material with height stream is packing material, utilizes the making method of gravity casting vibratory compaction and High Temperature Curing:
First be that pre-treatment is carried out to steel pipe.Choose the hollow steel tube of wall thickness 3-5mm, length and diameter are determined as requested, the perfusion of hollow steel tube 0.5M dilute sulphuric acid are carried out the rear tap water of inwall rust cleaning, then use gas blower air-dry.
The height stream of filling becomes the preparation of raw material that micro-expansibility cement-based material selects following weight ratio: ordinary Portland cement 5-10 part, calcining coal gangue slag ultrafine powder 20-50 part, benzene emulsion 3-5 part, polypropylene fibre 1-5 part, zinc hydroxide 1-3 part, polycarboxylate water-reducer 1-3 part, Sodium sulfate anhydrous.min(99) 3-8 part, refuse clay brick particle (1-5mm) 10-20 part, sintering ceramsite (5-10mm) 20-40 part, water is appropriate.
Then the raw material prepared is stirred 5min in stirrer, and utilize concrete pump to pour into vertically placing in bottom end seal steel pipe, utilize bobbing machine to vibrate steel pipe simultaneously, get rid of bubble, limit perfusion becomes vibration until fill, sealed steel pipe upper end.
Finally will prepare sealed steel pipe above utilizes the maintenance 16-20h under 90-100 DEG C of condition such as normal-pressure boiler steam or electric heating namely to obtain product in curing room.
A kind of method utilizing cement based constraint material to prepare underground coal mine support bar provided by the invention, compared with the conventional method, the essential characteristics that the present invention gives prominence to and significant effect are:
(1) problem of little, the heavy and fire-resistant anti-corrosion difference of the ultimate compression strength such as traditional support steel plate, girder steel is solved.Utilize the fine and close Behavior of Hardened Cement Paste of height that cement-based material is produced under swelling agent Sodium sulfate anhydrous.min(99) and constraint hydrating condition, solve the problem that steel material ultimate compression strength is low, resistivity against fire is poor (containing a large amount of Bound moisture and mechanical water in Behavior of Hardened Cement Paste, particularly having added fire retardant zinc hydroxide); Because petrifying water mudstone density is much smaller than steel, especially owing to adding aglite and organic polymer, improving cement-based material mobility and homogeneity while, greatly reduce the weight of support bar and save steel.
(2) shorten curing time, improve cement based constraint material and prepare underground coal mine support bar production efficiency, thus reduce the production cost produced.When maintenance being carried out to the underground coal mine support bar utilizing cement based constraint material to prepare according to steaming pressuring curing system of the present invention, only need be incubated the shorter time at high temperature and can generate required hydrated product, substantially reduce curing time, improve production efficiency in the performance improving the underground coal mine support bar utilizing cement based constraint material to prepare simultaneously, reduce production cost.
Embodiment
Below in conjunction with specific embodiment, the invention will be further described, it should be noted that, following embodiment is only illustrative, does not do any restriction to the present invention, and method of the present invention also can be used for other cement based constraint material etc.
Embodiment 1
One utilizes cement based constraint material to prepare underground coal mine support bar, it is characterized in that by following material in mass ratio mix and blend 5min make uniform slurry: cement 10 parts, calcining coal gangue slag ultrafine powder 20 parts, benzene emulsion 5 parts, polypropylene fibre 3 parts, zinc hydroxide 2 parts, polycarboxylate water-reducer 3 parts, Sodium sulfate anhydrous.min(99) 5 parts, refuse clay brick particle (1-5mm) 10 parts, sintering ceramsite (5-10mm) 20 parts, 17 parts, water.
Utilized by slurry concrete pump to pour into vertically placing in bottom end seal steel pipe, utilize bobbing machine to vibrate steel pipe simultaneously, get rid of bubble, limit perfusion becomes vibration until fill, sealed steel pipe upper end.
Sealed steel pipe will be prepared above, in curing room, utilize the maintenance 16h under 100 DEG C of conditions such as normal-pressure boiler steam or electric heating namely to obtain product.
Embodiment 2
One utilizes cement based constraint material to prepare underground coal mine support bar, it is characterized in that by following material in mass ratio mix and blend 5min make uniform slurry: cement 5 parts, calcining coal gangue slag ultrafine powder 30 parts, benzene emulsion 3 parts, polypropylene fibre 1 part, zinc hydroxide 1 part, polycarboxylate water-reducer 1 part, Sodium sulfate anhydrous.min(99) 8 parts, refuse clay brick particle (1-5mm) 20 parts, sintering ceramsite (5-10mm) 40 parts, 17 parts, water.
Underground coal mine support bar is prepared in, maintenance shaping by embodiment 1 method.
Embodiment 3
One utilizes cement based constraint material to prepare underground coal mine support bar, it is characterized in that by following material in mass ratio mix and blend 5min make uniform slurry: cement 10 parts, calcining coal gangue slag ultrafine powder 50 parts, benzene emulsion 5 parts, polypropylene fibre 5 parts, zinc hydroxide 3 parts, polycarboxylate water-reducer 3 parts, Sodium sulfate anhydrous.min(99) 5 parts, refuse clay brick particle (1-5mm) 10 parts, sintering ceramsite (5-10mm) 20 parts, 17 parts, water.
Utilized by slurry concrete pump to pour into vertically placing in bottom end seal steel pipe, utilize bobbing machine to vibrate steel pipe simultaneously, get rid of bubble, limit perfusion becomes vibration until fill, sealed steel pipe upper end.
Sealed steel pipe will be prepared above, in curing room, utilize the maintenance 20h under 90 DEG C of conditions such as normal-pressure boiler steam or electric heating namely to obtain product.
Claims (3)
1. make a method for underground coal mine support bar, for the production of being obligatory point with hollow steel tube, take cement-based material as the support bar of weighting material, the method comprises following steps successively:
1) pre-treatment of steel pipe: the hollow steel tube choosing wall thickness 3-5mm, first carries out inwall rust cleaning with the sulfuric acid perfusion of 0.5M, then uses tap water, gas blower air-dry for subsequent use;
2) preparation of cement-based material: take ordinary Portland cement 5-10 part, calcining coal gangue slag ultrafine powder 20-50 part, benzene emulsion 3-5 part, polypropylene fibre 1-5 part, zinc hydroxide 1-3 part, polycarboxylate water-reducer 1-3 part, Sodium sulfate anhydrous.min(99) 3-8 part, refuse clay brick particle 10-20 part, sintering ceramsite 20-40 part by weight, in stirrer, stir 5min after adding suitable quantity of water, form high stream and become micro-expansibility cement-based material;
3) perfusion of cement-based material: utilize concrete pump that described height stream is become micro-expansibility cement-based material and pour into vertically placing in bottom end seal steel pipe, utilize bobbing machine to vibrate steel pipe simultaneously, get rid of bubble, limit perfusion becomes vibration until fill, sealed steel pipe upper end, forms sealed steel pipe;
4) maintenance of sealed steel pipe: sealed steel pipe is placed in curing room, namely obtains support bar through 90-100 DEG C of maintenance 16-20h.
2. the method for making underground coal mine support bar according to claim 1, is characterized in that, the refuse clay brick grain diameter interval of preparing cement-based material used is 1-5mm, and sintering ceramsite particle size interval is 5-10mm.
3. the method for making underground coal mine support bar according to claim 2, is characterized in that, curing room heating adopts normal-pressure boiler steam heating or electric heating.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410439670.3A CN104230263B (en) | 2014-09-02 | 2014-09-02 | A kind of method making underground coal mine support bar |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410439670.3A CN104230263B (en) | 2014-09-02 | 2014-09-02 | A kind of method making underground coal mine support bar |
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| Publication Number | Publication Date |
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| CN104230263A true CN104230263A (en) | 2014-12-24 |
| CN104230263B CN104230263B (en) | 2016-01-27 |
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| CN201410439670.3A Expired - Fee Related CN104230263B (en) | 2014-09-02 | 2014-09-02 | A kind of method making underground coal mine support bar |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113248224A (en) * | 2021-05-07 | 2021-08-13 | 河南工程学院 | Light-burning solid waste 3D printing ventilation sealing material and preparation method thereof |
| 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 |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5626665A (en) * | 1994-11-04 | 1997-05-06 | Ash Grove Cement Company | Cementitious systems and novel methods of making the same |
| CN1213654A (en) * | 1998-10-01 | 1999-04-14 | 四川省绵竹市齐福水泥厂 | Prodn. of composite portland cement by utilizing industrial waste residue |
| JP2001039758A (en) * | 1999-07-28 | 2001-02-13 | Denki Kagaku Kogyo Kk | Low environmental load type ultra high early strength concrete |
| CN103553482A (en) * | 2013-10-11 | 2014-02-05 | 上海质能新型材料科技有限公司 | Inorganic composite cementing material specialized for coal mine filling, and preparation method thereof |
| CN103570305A (en) * | 2012-07-20 | 2014-02-12 | 上海惠邦特种涂料有限公司 | Foam thermal insulation material |
-
2014
- 2014-09-02 CN CN201410439670.3A patent/CN104230263B/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5626665A (en) * | 1994-11-04 | 1997-05-06 | Ash Grove Cement Company | Cementitious systems and novel methods of making the same |
| CN1213654A (en) * | 1998-10-01 | 1999-04-14 | 四川省绵竹市齐福水泥厂 | Prodn. of composite portland cement by utilizing industrial waste residue |
| JP2001039758A (en) * | 1999-07-28 | 2001-02-13 | Denki Kagaku Kogyo Kk | Low environmental load type ultra high early strength concrete |
| CN103570305A (en) * | 2012-07-20 | 2014-02-12 | 上海惠邦特种涂料有限公司 | Foam thermal insulation material |
| CN103553482A (en) * | 2013-10-11 | 2014-02-05 | 上海质能新型材料科技有限公司 | Inorganic composite cementing material specialized for coal mine filling, and preparation method thereof |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113248224A (en) * | 2021-05-07 | 2021-08-13 | 河南工程学院 | Light-burning solid waste 3D printing ventilation sealing material and preparation method thereof |
| 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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| CN104230263B (en) | 2016-01-27 |
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