CN114853441A - Broken surrounding rock roadway rapid-setting double-liquid grouting reinforcing material and preparation method thereof - Google Patents
Broken surrounding rock roadway rapid-setting double-liquid grouting reinforcing material and preparation method thereof Download PDFInfo
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- CN114853441A CN114853441A CN202210465250.7A CN202210465250A CN114853441A CN 114853441 A CN114853441 A CN 114853441A CN 202210465250 A CN202210465250 A CN 202210465250A CN 114853441 A CN114853441 A CN 114853441A
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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
- C04B2111/70—Grouts, e.g. injection mixtures for cables for prestressed concrete
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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 relates to a broken country rock roadway rapid hardening biliquid slip casting reinforcing material and its preparation method, adopt polyurethane/water glass biliquid slip casting material, dibutyl phthalate and carbon dioxide produced in polyurethane polymerization process can promote the water glass to produce the gel tiny granule in situ, and added the nanometer carbon nanotube and made the injectability strong, it is easier to inject into tiny crack, the toxicity is low and is more suitable for the coal body slip casting, the composite material that the carbon nanotube nests nanometer silicon dioxide that provides is added into slurry, not only make the consolidation body more compact, can also improve mechanical properties and durability of the material; the surface modification is carried out on the nano inorganic material in the acid treatment process, so that the nano inorganic material has better compatibility with the slurry, the dispersing performance of the nano inorganic material is improved, and the alkalescence of the catalyst can be neutralized, so that the storage time of the polyurethane is longer.
Description
Technical Field
The invention belongs to the technical field of grouting filling materials, and particularly relates to a rapid-setting double-liquid grouting reinforcing material for a broken surrounding rock roadway and a preparation method thereof.
Background
Most of coal mine strata in China belong to soft strata, and in the mining process, the integrity of rock strata is poor and the breakage is serious under the influence of mining activities and geological structures, so that the roadway support work is greatly influenced. Therefore, effective support of the broken surrounding rock of the roadway is an inevitable requirement for safe production of mines. The grouting reinforcement can increase the bearing capacity of surrounding rocks, improve the strength of the surrounding rocks, reduce the crushing deformation of the surrounding rocks of the roadway and play an important role in supporting the surrounding rocks of the roadway.
Chinese patent CN111072366B discloses an inorganic double-liquid grouting material and a preparation method and application thereof, wherein the inorganic double-liquid grouting material comprises a component A of a potassium silicate and sodium silicate solution, 20-25 parts of superfine cement, 8-9 parts of mineral powder and a component B of fly ash, can be solidified and stopped in a short time, and can play a role in reinforcing a structure after being hardened, but because inorganic particles are immediately coagulated into particle clusters after being mixed, the injectability of mixed slurry in sand gravel is poor and the capability of the mixed slurry entering a rock stratum fracture channel is poor, so that the double-liquid grouting material cannot smoothly enter a rock stratum with medium and fine cracks; and the plugging effect of the double-liquid grouting material is poor. Chinese patent CN113004000A discloses a polymer type double-liquid grouting material for rapid leakage stoppage, a preparation method and a use method thereof, wherein hydrolyzed polyacrylamide in the A-liquid grouting material mainly plays roles of adsorption and adhesion promotion, and after the A-liquid grouting material is mixed with the B-liquid grouting material, the hydrolyzed polyacrylamide adsorbs bentonite particles in the B-liquid grouting material, and the viscosity of the grout is increased, but the gel strength of the acrylamide grout is lower, and the acrylamide grout has certain toxicity and higher price.
Therefore, how to provide a mining grouting reinforcement material with better performance index is a problem which people hope to solve.
Disclosure of Invention
Aiming at the prior art, the invention provides a rapid-setting double-liquid grouting reinforcing material for a broken surrounding rock roadway, which comprises a component A and a component B, wherein the volume ratio of the component A to the component B is 1: 1; wherein the component A comprises the following components in parts by mass: 80-120 parts of sodium silicate solution, 2-6 parts of water reducing agent and 1-3 parts of accelerating agent; the component B comprises the following components in parts by mass: 56-84 parts of polyphenyl polymethylene polyisocyanate, 24-36 parts of dibutyl phthalate, 1-3 parts of catalyst and 0.5-1 part of modified carbon nano tube embedded with silicon dioxide.
Preferably, the sodium silicate solution has a glass-beauty degree of 45-55 and a modulus of 2.5-3.0.
Preferably, the catalyst is one or two of triethylene diamine and N' N-dimethyl cyclohexylamine.
Preferably, the water reducing agent is a commercially available water reducing agent FDN-8000, FDN-03, FDN-C or KS-20; the expanding agent is aluminate expanding agent or sulphoaluminate expanding agent; the accelerator is a commercial J85 or 8880 type accelerator.
The preparation method of the modified carbon nanotube embedded with silicon dioxide comprises the following steps:
1) adding the weighed carbon nanotubes into a mixture with a volume ratio of 3: 1, transferring the carbon nano tube and the mixed acid into a stirring reactor, refluxing for 1-3h at 80-120 ℃, diluting, filtering, cleaning for several times, and drying to obtain the carbon nano tube with two open ends and modified by carboxyl;
2) placing the product obtained in the step 1) in the middle of a reaction tube, raising the temperature to 600 ℃, introducing fumed silica into the reaction tube at the flow rate of 200-1000 ml/min, and keeping for 2-4 h to obtain the modified carbon nanotube embedded with silica.
Preferably, the fumed silica is prepared by flame hydrolysis of silicon tetrachloride.
Preferably, the carbon nanotube is a short multi-walled carbon nanotube, the length of the carbon nanotube is 0.5-2 μm, the inner diameter of the tube is 5-10 nm, the outer diameter of the tube is 10-20 nm, and the specific surface area of the carbon nanotube is>200 m 2 (ii)/g, bulk density 0.22 g/cm 3 True density of about 2.1 g/cm 3 Electrical conductivity of>100 s/cm。
The invention also aims to provide a preparation method of the rapid-setting double-liquid grouting reinforcement material for the broken surrounding rock roadway, which comprises the following steps:
firstly, preparing a component A: adding a sodium silicate solution into the reaction kettle, adding a water reducing agent and an accelerating agent in the stirring process, and stirring for 30-60 min to obtain a grouting reinforcement material component A;
secondly, preparing a component B: and adding polyphenyl polymethylene polyisocyanate, dibutyl phthalate, a catalyst and the modified carbon nano tube embedded with silicon dioxide into a reaction kettle, and uniformly mixing to obtain the component B of the reinforcing material.
The invention provides an application of a rapid-hardening double-liquid grouting reinforcement material for a broken surrounding rock roadway, wherein a Y-shaped connector is adopted to mix and grout an A component and a B component in the method by a grouting pump according to the volume ratio of 1:1, and the grout is supplied for reinforcing the rock and soil of the broken surrounding rock roadway of coal bed geology.
Compared with the prior art, the polyurethane/water glass double-liquid grouting material, dibutyl phthalate and carbon dioxide generated in the polyurethane polymerization process can promote water glass to generate gel fine particles in situ, and the nano carbon nano tube is added, so that the grouting property is strong, the nano carbon nano tube can be injected into fine cracks more easily, the toxicity is low, and the grouting material is more suitable for coal body grouting; the surface modification is carried out on the nano inorganic material in the acid treatment process, so that the nano inorganic material has better compatibility with the slurry, the dispersing performance of the nano inorganic material is improved, and the alkalescence of the catalyst can be neutralized, so that the storage time of the polyurethane is longer.
Detailed Description
The following examples are intended to illustrate the practice and advantageous effects of the present invention, but are not to be construed as limiting the scope of the present invention.
Example 1
A rapid-setting double-liquid grouting reinforcement material for broken surrounding rock roadways comprises a component A and a component B, wherein the volume ratio of the component A to the component B is 1: 1; wherein the component A comprises the following components in parts by mass: 100 parts of sodium silicate solution, 4 parts of FDN-8000 water reducing agent and 2 parts of J85 type accelerating agent; the component B comprises the following components in parts by mass: 70 parts of polyphenyl polymethylene polyisocyanate, 30 parts of dibutyl phthalate, 2 parts of N' N-dimethyl cyclohexylamine and 0.8 part of modified carbon nano tube embedded with silicon dioxide.
The preparation method of the modified carbon nano tube embedded with the silicon dioxide comprises the following steps:
1) adding the weighed carbon nanotubes into a mixture with a volume ratio of 3: 1, transferring the carbon nano tube and the mixed acid into a stirring reactor, refluxing for 2 hours at 100 ℃, diluting, filtering, cleaning for a plurality of times, and drying to obtain the carbon nano tube with two open ends and modified by carboxyl;
2) placing the product obtained in the step 1) in the middle of a reaction tube, raising the temperature to 600 ℃, introducing fumed silica into the reaction tube at the flow rate of 800 ml/min, and keeping the flow rate for 3 hours to obtain the modified carbon nanotube embedded with silica.
A Y-shaped connector component A and a component B are mixed and grouted by a grouting pump according to the volume ratio of 1:1, and the supplied slurry is used for broken surrounding rock roadway rock-soil reinforcement of coal bed geology. Wherein, the preparation of the component A comprises the following steps: adding a sodium silicate solution with the glass beauty degree of 50 and the modulus of 2.5 into a reaction kettle, adding a water reducing agent and an accelerating agent in the stirring process, and stirring for 30-60 min to obtain a component A of the grouting reinforcement material; preparation of the component B: and adding polyphenyl polymethylene polyisocyanate, dibutyl phthalate, a catalyst and the modified carbon nano tube embedded with silicon dioxide into the reaction kettle, and uniformly mixing to obtain the component B of the reinforcing material.
Claims (9)
1. The utility model provides a broken country rock tunnel rapid hardening biliquid slip casting reinforced material which characterized in that: comprises a component A and a component B in a volume ratio of 1: 1; wherein the component A comprises the following components in parts by mass: 80-120 parts of sodium silicate solution, 2-6 parts of water reducing agent and 1-3 parts of accelerating agent; the component B comprises the following components in parts by mass: 56-84 parts of polyphenyl polymethylene polyisocyanate, 24-36 parts of dibutyl phthalate, 1-3 parts of catalyst and 0.5-1 part of modified carbon nano tube embedded with silicon dioxide.
2. The rapid-setting double-liquid grouting reinforcement material for the broken surrounding rock roadway, according to claim 1, is characterized in that: the sodium silicate solution has a glass beauty degree of 45-55 and a modulus of 2.5-3.0.
3. The rapid-setting double-liquid grouting reinforcement material for the broken surrounding rock roadway, according to claim 1, is characterized in that: the catalyst is one or two of triethylene diamine and N' N-dimethyl cyclohexylamine.
4. The rapid-setting double-liquid grouting reinforcement material for the broken surrounding rock roadway, according to claim 1, is characterized in that: the water reducing agent is a commercially available water reducing agent FDN-8000, FDN-03, FDN-C or KS-20; the expanding agent is aluminate expanding agent or sulphoaluminate expanding agent; the accelerating agent is a commercial J85 or 8880 type accelerating agent.
5. The rapid-setting double-liquid grouting reinforcement material for the broken surrounding rock roadway, according to claim 1, is characterized in that: the preparation method of the modified carbon nanotube embedded with silicon dioxide comprises the following steps:
1) adding the weighed carbon nanotubes into a mixture with a volume ratio of 3: 1, transferring the carbon nano tube and the mixed acid into a stirring reactor, refluxing for 1-3h at 80-120 ℃, diluting, filtering, cleaning for several times, and drying to obtain the carbon nano tube with two open ends and modified by carboxyl;
2) placing the product obtained in the step 1) in the middle of a reaction tube, raising the temperature to 600 ℃, introducing fumed silica into the reaction tube at the flow rate of 200-1000 ml/min, and keeping for 2-4 h to obtain the modified carbon nanotube embedded with silica.
6. The rapid-setting double-liquid grouting reinforcement material for the broken surrounding rock roadway, according to claim 5, is characterized in that: the fumed silica is prepared by a silicon tetrachloride flame hydrolysis method.
7. The rapid-setting double-liquid grouting reinforcement material for the broken surrounding rock roadway, according to claim 5, is characterized in that: the carbon nanotube is short multi-walled carbon nanotube with length of 0.5-2 μm, inner diameter of 5-10 nm, outer diameter of 10-20 nm, and specific surface area>200 m 2 (ii)/g, bulk density 0.22 g/cm 3 True density of about 2.1 g/cm 3 Electrical conductivity of>100 s/cm。
8. The preparation method of the rapid-setting double-liquid grouting reinforcement material for the broken surrounding rock roadway, according to claim 1, comprises the following steps:
firstly, preparing a component A: adding a sodium silicate solution into a reaction kettle, adding a water reducing agent and an accelerating agent in the stirring process, and stirring for 30-60 min to obtain a grouting reinforcement material A component;
secondly, preparing a component B: and adding polyphenyl polymethylene polyisocyanate, dibutyl phthalate, a catalyst and the modified carbon nano tube embedded with silicon dioxide into a reaction kettle, and uniformly mixing to obtain the component B of the reinforcing material.
9. The application of the rapid-setting double-liquid grouting reinforcement material for the broken surrounding rock roadway, according to claim 1, wherein a Y-shaped connector is adopted to mix and grout the component A and the component B in the method by a grouting pump according to the volume ratio of 1:1, and the grout is supplied for rock and soil reinforcement of the broken surrounding rock roadway of coal bed geology.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210465250.7A CN114853441B (en) | 2022-04-29 | 2022-04-29 | Broken surrounding rock roadway rapid-setting double-liquid grouting reinforcing material and preparation method thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210465250.7A CN114853441B (en) | 2022-04-29 | 2022-04-29 | Broken surrounding rock roadway rapid-setting double-liquid grouting reinforcing material and preparation method thereof |
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| CN114853441A true CN114853441A (en) | 2022-08-05 |
| CN114853441B CN114853441B (en) | 2023-03-24 |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106543688A (en) * | 2016-11-22 | 2017-03-29 | 山东科技大学 | A kind of organic/inorganic nano combined casting material and preparation method thereof |
| CN107383427A (en) * | 2017-08-23 | 2017-11-24 | 江苏海美新材料有限公司 | A kind of method of modifying of CNT composite silicon dioxide titanic oxide material |
| CN108863280A (en) * | 2018-07-11 | 2018-11-23 | 河南理工大学 | A kind of mud stone injecting paste material |
| CN114349931A (en) * | 2022-01-11 | 2022-04-15 | 中国矿业大学 | Modified silicate grouting reinforcement material and preparation method and application thereof |
-
2022
- 2022-04-29 CN CN202210465250.7A patent/CN114853441B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106543688A (en) * | 2016-11-22 | 2017-03-29 | 山东科技大学 | A kind of organic/inorganic nano combined casting material and preparation method thereof |
| CN107383427A (en) * | 2017-08-23 | 2017-11-24 | 江苏海美新材料有限公司 | A kind of method of modifying of CNT composite silicon dioxide titanic oxide material |
| CN108863280A (en) * | 2018-07-11 | 2018-11-23 | 河南理工大学 | A kind of mud stone injecting paste material |
| CN114349931A (en) * | 2022-01-11 | 2022-04-15 | 中国矿业大学 | Modified silicate grouting reinforcement material and preparation method and application thereof |
Non-Patent Citations (2)
| Title |
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| 唐婕: "《环保陶瓷生产与应用》", 31 January 2018, 中国建材工业出版社 * |
| 谢春鹏: "新型聚氨酯_水玻璃双液浆注浆加固煤体模型试验研究", 《中国优秀硕士学位论文全文数据库 工程科技Ⅰ辑》 * |
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