CN114426425A - Double-liquid rapid-hardening grouting reinforcement inorganic material and construction process - Google Patents
Double-liquid rapid-hardening grouting reinforcement inorganic material and construction process Download PDFInfo
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- 229910010272 inorganic material Inorganic materials 0.000 title claims abstract description 68
- 239000011147 inorganic material Substances 0.000 title claims abstract description 68
- 239000007788 liquid Substances 0.000 title claims abstract description 41
- 230000002787 reinforcement Effects 0.000 title claims abstract description 39
- 238000000034 method Methods 0.000 title claims abstract description 20
- 230000008569 process Effects 0.000 title claims abstract description 17
- 238000010276 construction Methods 0.000 title claims abstract description 16
- 238000002156 mixing Methods 0.000 claims abstract description 46
- 239000000463 material Substances 0.000 claims abstract description 42
- 239000004568 cement Substances 0.000 claims abstract description 31
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 31
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 22
- 238000003756 stirring Methods 0.000 claims abstract description 21
- UFWIBTONFRDIAS-UHFFFAOYSA-N Naphthalene Chemical compound C1=CC=CC2=CC=CC=C21 UFWIBTONFRDIAS-UHFFFAOYSA-N 0.000 claims abstract description 18
- 239000004594 Masterbatch (MB) Substances 0.000 claims abstract description 14
- 238000002425 crystallisation Methods 0.000 claims abstract description 14
- 230000008025 crystallization Effects 0.000 claims abstract description 14
- 239000003245 coal Substances 0.000 claims abstract description 13
- ODINCKMPIJJUCX-UHFFFAOYSA-N calcium oxide Inorganic materials [Ca]=O ODINCKMPIJJUCX-UHFFFAOYSA-N 0.000 claims abstract description 12
- 238000006243 chemical reaction Methods 0.000 claims abstract description 12
- 239000000292 calcium oxide Substances 0.000 claims abstract description 11
- BRPQOXSCLDDYGP-UHFFFAOYSA-N calcium oxide Chemical compound [O-2].[Ca+2] BRPQOXSCLDDYGP-UHFFFAOYSA-N 0.000 claims abstract description 10
- FPAFDBFIGPHWGO-UHFFFAOYSA-N dioxosilane;oxomagnesium;hydrate Chemical compound O.[Mg]=O.[Mg]=O.[Mg]=O.O=[Si]=O.O=[Si]=O.O=[Si]=O.O=[Si]=O FPAFDBFIGPHWGO-UHFFFAOYSA-N 0.000 claims abstract description 10
- 239000010881 fly ash Substances 0.000 claims abstract description 10
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- 239000002994 raw material Substances 0.000 claims abstract description 3
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- 239000002002 slurry Substances 0.000 claims description 29
- 239000003566 sealing material Substances 0.000 claims description 15
- 229910000831 Steel Inorganic materials 0.000 claims description 12
- 239000010959 steel Substances 0.000 claims description 12
- 239000011440 grout Substances 0.000 claims description 11
- 238000007789 sealing Methods 0.000 claims description 11
- 239000012530 fluid Substances 0.000 claims description 9
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- 238000011056 performance test Methods 0.000 description 6
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- 229920000642 polymer Polymers 0.000 description 4
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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
- C04B28/02—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
- C04B28/10—Lime cements or magnesium oxide cements
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D11/00—Lining tunnels, galleries or other underground cavities, e.g. large underground chambers; Linings therefor; Making such linings in situ, e.g. by assembling
- E21D11/04—Lining with building materials
- E21D11/10—Lining with building materials with concrete cast in situ; Shuttering also lost shutterings, e.g. made of blocks, of metal plates or other equipment adapted therefor
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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
- C04B2111/00724—Uses not provided for elsewhere in C04B2111/00 in mining operations, e.g. for backfilling; in making tunnels or galleries
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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
- C04B2201/00—Mortars, concrete or artificial stone characterised by specific physical values
- C04B2201/05—Materials having an early high strength, e.g. allowing fast demoulding or formless casting
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Abstract
The invention discloses a double-liquid quick-setting grouting reinforcement inorganic material and a construction process, belonging to the technical field of coal mine grouting reinforcement; the double-component inorganic material comprises a component A and a component B, and is prepared from the following raw materials in parts by weight: the component A comprises 15-30 parts of cement, 20-40 parts of plugging agent, 3-10 parts of inorganic permeable crystallization active master batch, 40-50 parts of fly ash and 0.3-0.5 part of cellulose ether; the component B comprises 30-50 parts of calcium oxide, 40-60 parts of talcum powder, 8-10 parts of accelerating agent and 0.5-1 part of naphthalene-based superplasticizer; weighing inorganic materials of the component A and the component B according to parts by weight, respectively adding water, mixing and stirring, and then mixing the inorganic materials according to the weight ratio of 1: the mixture with the proportion of 1 can be used for grouting reinforcement. The formula of the invention adopts a two-component inorganic material, overcomes the performance defects of high reaction temperature, flammability, toxicity and corrosivity of a high-molecular grouting material, has higher reaction speed, improves the grouting effect, has quick strength increase, and meets the engineering requirements of quick propulsion of a working face and quick deformation of a roadway.
Description
Technical Field
The invention relates to a grouting reinforcement material, in particular to a double-liquid rapid-hardening grouting reinforcement inorganic material and a construction process, and belongs to the technical field of coal mine grouting reinforcement.
Background
Aiming at the wall caving, roof caving, surrounding rock roadway crushing without guniting and rapid deformation roadway of a working face, common cement or polymer grouting materials are mostly adopted in the past, but the two materials often have the following problems in the actual use process:
1) although the ordinary cement is low in price, the setting speed is low, the leakage slurry is difficult to block, the strength is slowly increased, the effective grouting amount is small, and the reinforcing effect is poor.
2) The polymer grouting material has excellent performance, fast condensation, high strength, strong cohesiveness and obvious effect, but has the serious problems of high reaction temperature (more than 200 ℃), toxicity, corrosivity, high price, difficult washing, ignition of the grouting material and the like, and the polymer material is used in each mine area in a limited amount at present.
Therefore, the grouting reinforcement material which is fast in condensation, high in strength, non-toxic, non-corrosive, safe and effective is needed to be researched, and the process of grouting reinforcement construction of a coal mine is accelerated.
Disclosure of Invention
The purpose of the invention is: in order to effectively solve the problem of slurry leakage, greatly improve the grouting effect and meet the engineering requirements of quick propulsion of a working face and quick deformation of a roadway, a double-liquid quick-setting grouting reinforcement inorganic material and a construction process are provided, a double-component inorganic formula material is adopted, the performance defects of high reaction temperature, combustibility, toxicity and corrosiveness of a high-molecular grouting material are overcome, the grouting effect is improved, the strength is rapidly increased, and the reaction temperature is low (less than 75 ℃); can replace the high polymer grouting material, reduce production cost.
In order to achieve the purpose, the invention adopts the following technical scheme: a double-liquid quick-setting grouting reinforcement inorganic material comprises a double-component inorganic material of a component A and a component B, and is prepared from the following raw materials in parts by weight:
the component A comprises 15-30 parts of cement, 20-40 parts of plugging agent, 3-10 parts of inorganic permeable crystallization active master batch, 40-50 parts of fly ash and 0.3-0.5 part of cellulose ether;
the component B comprises 30-50 parts of calcium oxide, 40-60 parts of talcum powder, 8-10 parts of accelerating agent and 0.5-1 part of naphthalene-based superplasticizer;
weighing inorganic materials of the component A and the component B according to parts by weight, respectively adding water, mixing and stirring, and then mixing the inorganic materials according to the weight ratio of 1: the mixture with the proportion of 1 can be used for grouting reinforcement.
The cement is sulphoaluminate cement with the compressive strength of 50MPa or Portland cement with the label of 52.5.
The inorganic infiltration crystallization active master batch is a cement-based infiltration crystallization active master batch.
The plugging agent adopts F-type quick hydraulic powdery material with initial setting time not later than 3min and final setting time not later than 5 min.
The reaction temperature of the component A and the component B is less than or equal to 65 ℃, and the grouting reinforcement strength after mixing is higher than 40 MPa.
A construction process for reinforcing inorganic materials by double-liquid quick-setting grouting comprises the following steps:
s1, punching holes at the punched positions in the coal seam, putting a bag type hole sealing device and a high-pressure steel pipe into the drilled holes, connecting a slurry discharge port of a pneumatic grouting pump and the bag type hole sealing device together by using a quick connector, adding an inorganic hole sealing material into a mixing drum of the pneumatic grouting pump, and then, according to the weight ratio of the inorganic hole sealing material to water of 1: adding water according to the proportion of 1.2 for dilution, starting a pneumatic grouting pump after uniform stirring, and pulling out a quick connector to connect with other drill holes for grouting and hole sealing in sequence after grouting of the drill hole is finished;
s2, after embedding the high-pressure steel pipe into the drilled hole, pouring the prepared component A and component B in parts by weight into two pneumatic stirrers respectively and stirring uniformly, wherein the component A and the component B are respectively mixed according to the weight ratio of 0.35-0.8: 1, respectively adding water into the water-cement ratio, and uniformly stirring and mixing;
s3, putting two slurry suction pipes of the pneumatic double-fluid grouting pump into two mixers to suck A, B two slurries into a pump body according to a weight ratio of 1: the proportion of 1 is mixed at the grout outlet of the pneumatic double-liquid grouting pump, the pneumatic double-liquid grouting pump is started, the pressure is adjusted to 10MPa, and the double-liquid rapid-setting grouting reinforcement inorganic material formed after mixing is injected into the coal seam through a high-pressure steel pipe.
In the step S1, the drilling diameter of the drilled hole is 75-90 mm, and the depth is 100 m; the outer diameter of the high-pressure steel pipe is 40 mm; the inorganic hole sealing material adopts a powdery micro-expansion hole sealing material which does not generate high temperature, has short solidification time and large compressive strength.
In step S1, the structure of the bag type hole packer includes: a grouting pipe with the outer diameter of 16mm and the inner diameter of 12mm, wherein two ends of the grouting pipe are respectively provided with a bag woven by nylon fiber yarns and a blasting valve positioned in the middle of the grouting pipe; the structure of pneumatic slip casting pump includes: the grouting pump body, a mixing drum, a pneumatic mixer and a pressure limiting valve.
In the step S2, the pneumatic double-liquid grouting pump consists of two slurry suction pipes and one grouting pipe, the working pressure is 0.3-0.8MPa, and the slurry outlet pressure is adjustable within the range of 0-100 MPa.
The invention has the beneficial effects that:
1) the grouting formula material of the invention adopts a two-component inorganic material, has smaller difference with a high polymer grouting material in the setting time and the compressive strength, and belongs to a rapid solidification type material; the two-component inorganic material comprises a component A and a component B, water is respectively added and stirred when the two-component inorganic material is used on site, after the two slurry bodies are mixed, the two slurry bodies can be condensed within 30 s-2 min, the two slurry bodies are completely solidified within 3-5 min, the strength is rapidly increased, the strength reaches more than 10MPa in 15min, the two-component inorganic material can be widely applied to grouting reinforcement and water plugging under the engineering conditions of a roadway with strong mine pressure, a mining working surface, a non-guniting roadway and the like, and is also suitable for grouting engineering under the similar engineering conditions of highways, subways, tunnels and the like.
2) The grouting formula material has larger difference with a high-molecular grouting material in cohesiveness, completely overcomes the performance defects of high reaction temperature, combustibility, toxicity, corrosiveness and high cost of the high-molecular grouting material, greatly improves the grouting effect, has rapid strength increase, belongs to an environment-friendly green material, can replace the high-molecular grouting material, and reduces the production cost.
3) When the grouting formula material is applied to a construction process, the inorganic materials of the component A and the component B are mixed according to the weight ratio of 0.35-0.8: 1, respectively mixing and stirring uniformly, and then mixing the materials in a weight ratio of 1: 1, grouting, mixing the two slurries, injecting the two slurries into a drilled hole, setting for 5min, plugging surrounding gaps, wherein the strength can reach 15MPa in one hour, the strength can reach 40MPa after one day, and the temperature can reach the highest value but not exceed 70 ℃. The following problems can be effectively solved: the method has the advantages of solving the problem of grouting and leakage of a non-grouted roadway, grouting and reinforcing extremely-broken surrounding rocks, grouting engineering with higher requirements on timeliness, grouting in an advanced bearing pressure area, and directly sealing holes by using grout.
Drawings
FIG. 1 is a structural diagram of a construction process of a dual-fluid rapid-setting grouting reinforced inorganic material.
In the figure, 1-A stock pile, 2-A pneumatic stirrer, 3-A stock slurry storage barrel, 4-pneumatic double-liquid grouting pump, 5-B stock slurry storage barrel, 6-B pneumatic stirrer, 7-B stock pile, 8-B water tank, 9-A water tank, 10-water pipe, 11-A valve and 12-B valve.
Detailed Description
The invention is further explained below with reference to the figures and the embodiments.
The various starting materials used in the following examples are all commercially available products known in the art unless otherwise specified.
The invention provides a double-liquid quick-setting grouting reinforcement inorganic material, which comprises a double-component inorganic material of a component A and a component B, and comprises the following components in parts by weight: the component A comprises 15-30 parts of sulphoaluminate cement, 20-40 parts of plugging agent, 3-10 parts of cement-based permeable crystallization active master batch, 40-50 parts of fly ash and 0.3-0.5 part of cellulose ether; the component B comprises 30-50 parts of calcium oxide, 40-60 parts of talcum powder, 8-10 parts of accelerating agent and 0.5-1 part of naphthalene-based superplasticizer.
The sulphoaluminate cement in the component A is commonly called rapid hardening cement, has the strength of 50MPa and the characteristic of micro-expansion, and can be replaced by Portland cement with the label of 52.5; the leakage stoppage agent is an F-type rapid hydraulic powdery material, has the functions of rapid setting, rapid hardening, early strength, high strength, no shrinkage, strong cohesiveness, leakage stoppage, water prevention and crack control, has the initial setting time of not later than 3min, the final setting time of not later than 5min, the compressive strength after 15min is more than 10MPa, and the compressive strength after 1 hour is more than 15 MPa; the cement-based permeable crystallization active master batch is a cement additive, so that the impermeability strength of cement is improved; fly ash is used as filler.
Calcium oxide in the component B is commonly called as quicklime and is mixed with water to carry out chemical reaction to produce calcium hydroxide, and heat is generated in the reaction process; the accelerator plays a role in adjusting the solidification time; talcum powder is used as filler.
When the color-changeable water-based paint is used on site, A, B two components are respectively added with water and stirred, and then the weight ratio of the A, B two components is 1: 1, and grouting reinforcement in coal seam drilling.
The reaction temperature of the component A and the component B is less than or equal to 65 ℃, and the grouting reinforcement strength after mixing is higher than 40 MPa.
Example 1:
the double-liquid rapid-setting grouting reinforcement inorganic material comprises a double-component inorganic material of a component A and a component B, and is prepared from the following components in parts by weight: wherein the component A comprises 20 parts of sulphoaluminate cement, 30 parts of plugging agent, 5 parts of cement-based permeable crystallization active master batch, 44 parts of fly ash and 0.3 part of cellulose ether; the component B comprises 40 parts of calcium oxide, 50 parts of talcum powder, 9 parts of accelerating agent and 0.5 part of naphthalene-based high-efficiency water reducing agent.
Mixing the inorganic materials of the component A and the component B according to the weight ratio of 0.35-0.8: 1, respectively mixing and stirring uniformly, and then mixing the materials in a weight ratio of 1: 1, grouting after mixing, and detecting the setting time and the performance of the solidified material. The performance test results of the double-liquid quick-setting grouting reinforced inorganic material are shown in the following table 1:
example 2:
the double-liquid quick-setting grouting reinforcement inorganic material comprises a double-component inorganic material of a component A and a component B, and comprises the following components in parts by weight: wherein the component A comprises 15 parts of sulphoaluminate cement, 25 parts of plugging agent, 9 parts of cement-based permeable crystallization active master batch, 50 parts of fly ash and 0.3 part of cellulose ether; the component B comprises 30 parts of calcium oxide, 60 parts of talcum powder, 9 parts of accelerating agent and 0.5 part of naphthalene-based high-efficiency water reducing agent.
Mixing the inorganic materials of the component A and the component B according to the weight ratio of 0.35-0.8: 1, respectively mixing and stirring uniformly, and then mixing the materials in a weight ratio of 1: 1, grouting after mixing, and detecting the setting time and the performance of the solidified material. The performance test results of the dual-liquid rapid-setting grouting reinforced inorganic material are shown in the following table 2:
example 3:
the double-liquid quick-setting grouting reinforcement inorganic material comprises a double-component inorganic material of a component A and a component B, and comprises the following components in parts by weight: wherein the component A comprises 30 parts of sulphoaluminate cement, 20 parts of plugging agent, 6 parts of cement-based permeable crystallization active master batch, 40 parts of fly ash and 0.5 part of cellulose ether; the component B comprises 50 parts of calcium oxide, 40 parts of talcum powder, 8 parts of accelerating agent and 1.0 part of naphthalene-based high-efficiency water reducing agent.
Mixing the inorganic materials of the component A and the component B according to the weight ratio of 0.35-0.8: 1, respectively mixing and stirring uniformly, and then mixing the materials in a weight ratio of 1: 1, grouting after mixing, and detecting the setting time and the performance of the solidified material. The performance test results of the double-liquid quick-setting grouting reinforced inorganic material are shown in the following table 3:
example 4:
the double-liquid rapid-setting grouting reinforcement inorganic material comprises a double-component inorganic material of a component A and a component B, and is prepared from the following components in parts by weight: wherein the component A comprises 18 parts of sulphoaluminate cement, 40 parts of plugging agent, 3 parts of cement-based permeable crystallization active master batch, 40 parts of fly ash and 0.4 part of cellulose ether; the component B comprises 35 parts of calcium oxide, 55 parts of talcum powder, 10 parts of accelerating agent and 0.6 part of naphthalene-based high-efficiency water reducing agent.
Mixing the inorganic materials of the component A and the component B according to the weight ratio of 0.35-0.8: 1, respectively mixing and stirring uniformly, and then mixing the materials in a weight ratio of 1: 1, grouting after mixing, and detecting the setting time and the performance of the solidified material. The performance test results of the double-liquid quick-setting grouting reinforced inorganic material are shown in the following table 4:
example 5:
the double-liquid quick-setting grouting reinforcement inorganic material comprises a double-component inorganic material of a component A and a component B, and comprises the following components in parts by weight: wherein the component A comprises 25 parts of sulphoaluminate cement, 22 parts of plugging agent, 10 parts of cement-based permeable crystallization active master batch, 45 parts of fly ash and 0.4 part of cellulose ether; the component B comprises 45 parts of calcium oxide, 45 parts of talcum powder, 9 parts of accelerating agent and 0.8 part of naphthalene-based high-efficiency water reducing agent.
Mixing the inorganic materials of the component A and the component B according to the weight ratio of 0.35-0.8: 1, respectively mixing and stirring uniformly, and then mixing the materials in a weight ratio of 1: 1, grouting after mixing, and detecting the setting time and the performance of the solidified material. The performance test results of the double-liquid quick-setting grouting reinforced inorganic material are shown in the following table 5:
in combination with the performance test results of examples 1-5, comparative analysis found that: the higher the weight ratio of the plugging agent is, the shorter the setting time is, the higher the weight ratio of the cement is, the higher the initial compressive strength is, but the compressive strength after final setting is not so large as to be about 50MPa, the coal mine tunnel reinforcement requirement can be met, the setting time can be adjusted according to the actual condition of a tunnel site, and the application range is wide.
The double-liquid rapid-setting grouting reinforcement inorganic material has smaller difference with a high-molecular chemical material in setting time and compressive strength, and belongs to a rapid-setting material. The double-liquid quick-setting grouting reinforcement inorganic material completely overcomes the major defects of high reaction temperature, combustibility, toxicity, corrosiveness and high cost of a high-molecular grouting material, is an environment-friendly green material, and can replace a high-molecular chemical material in most fields.
A construction process for reinforcing inorganic materials by double-liquid quick-setting grouting comprises the following steps:
s1, punching holes at the positions of the punched holes in the coal seam, wherein the punching holes are 75-90 mm in diameter and 100m in depth; placing a bag type hole sealing device and a high-pressure steel pipe into a drill hole, connecting a slurry discharge port of a pneumatic grouting pump and the bag type hole sealing device together by using a quick connector, and adding an inorganic hole sealing material into a stirring cylinder of the pneumatic grouting pump, wherein the inorganic hole sealing material is a powdery micro-expansion hole sealing material which does not generate high temperature, is short in solidification time and has high compressive strength; and then mixing the inorganic hole sealing material with water according to the weight ratio of 1: and adding water for dilution according to the proportion of 1.2, and starting a pneumatic grouting pump after uniform stirring.
The structure of bag-type hole packer includes: a grouting pipe with the outer diameter of 16mm and the inner diameter of 12mm, wherein two ends of the grouting pipe are respectively provided with a bag woven by nylon fiber yarns and a blasting valve positioned in the middle of the grouting pipe; the structure of pneumatic slip casting pump includes: the grouting pump body, a mixing drum, a pneumatic stirrer and a pressure limiting valve.
The method comprises the steps that inorganic hole sealing materials are injected into bags at two ends of a bag type hole packer, after the bags at the two ends are fully injected and expanded, the two ends are blocked, the pressure in the hole packer rises, when the pressure in the hole packer exceeds the pressure which can be borne by a blasting valve in the middle of the hole packer, the blasting valve is blasted, the inorganic hole sealing materials flow out of the blasting valve of the hole packer and flow towards the two ends of a drill hole, when cracks in the drill hole and around the drill hole are fully injected with the inorganic hole sealing materials, the pressure in the hole rises, when the pressure in the hole reaches the pressure set by a pressure limiting valve of a pneumatic grouting pump, the grouting pump automatically stops working, and after the drill hole is completely grouted, a quick connector is pulled out to be connected with other drill holes to perform sequential grouting and hole sealing.
S2, drilling, grouting and sealing holes, burying a high-pressure steel pipe with the outer diameter of 40mm into the drilled hole, and then pouring the component A and the component B which are prepared according to the parts by weight into two pneumatic stirrers respectively to be uniformly stirred, wherein the pneumatic double-liquid grouting pump consists of two slurry suction pipes and a grouting pipe, the working pressure is 0.3-0.8MPa, and the slurry outlet pressure is adjustable between 0-100 MPa; the component A and the component B are respectively mixed according to the weight ratio of 0.35-0.8: 1, respectively adding water, stirring and uniformly mixing.
S3, putting two slurry suction pipes of the pneumatic double-fluid grouting pump into two mixers to suck A, B two slurries into a pump body according to a weight ratio of 1: the proportion of 1 is mixed at the grout outlet of the pneumatic double-liquid grouting pump, the pneumatic double-liquid grouting pump is started, the pressure is adjusted to 10MPa, and the double-liquid quick-setting grouting reinforcement inorganic material formed after mixing is injected into the coal seam through a high-pressure steel pipe.
Under the action of high pressure, the double-liquid rapid-setting grouting reinforcement inorganic material can penetrate into all cracks around the drill hole, the double-liquid rapid-setting grouting reinforcement inorganic material can be solidified for 5min to block the surrounding cracks, the strength after final setting reaches more than 40MPa, the highest reaction temperature of A, B two-component inorganic materials is 65 ℃, and the temperature is lower than the mine safety temperature.
As shown in fig. 1, the construction process flow structure diagram of the dual-hydraulic rapid-hardening grouting reinforcement inorganic material of the present invention is shown, and the construction process flow combined with the structure diagram is as follows: pouring the component A in the material pile 1A into a pneumatic stirrer 2A, opening a valve 11, and adding a certain amount of water into a water tank 9A; according to the water-material ratio of 1: 2, adding water into the pneumatic stirrer 2A, starting the pneumatic stirrer 2A to stir for not less than 5min, and pouring the slurry A into the slurry storage barrel 3 after uniform stirring; meanwhile, the component B is also uniformly stirred and poured into a material B pulp storage barrel 5 according to the steps.
And after A, B two kinds of grout are prepared, starting a pneumatic double-liquid grouting pump 4, sucking A, B two kinds of grout by the pneumatic double-liquid grouting pump 4, mixing the two kinds of grout at a grout outlet, injecting the grout into the coal seam through a high-pressure steel pipe buried in the coal seam, wherein the grouting pressure is about 10MPa, the two kinds of grout are mixed and injected into a drilled hole, the grout is initially set for 5min, the strength can reach 15MPa in one hour, the strength can reach 40MPa after one day, and the temperature is highest but not more than 70 ℃.
The double-liquid quick-setting grouting reinforcement inorganic material is a double-component inorganic material, comprises a component A and a component B, and is prepared by adding water to the two components respectively and stirring the two components and then mixing the two components when the double-liquid quick-setting grouting reinforcement inorganic material is used on site, after the two slurry bodies of the double-liquid quick-setting grouting reinforcement inorganic material are mixed, the two slurry bodies are set within 30 s-2 min, the two slurry bodies are completely cured within 3-5 min, the strength is rapidly increased, and the strength reaches over 10MPa at 15 min; the grouting material is suitable for grouting reinforcement and water plugging under the engineering conditions of a roadway with strong mine pressure, a mining working surface, a non-guniting roadway and the like, and is also suitable for grouting engineering under the similar engineering conditions of highways, subways, tunnels and the like.
The above description is only for the purpose of illustrating the technical solutions of the present invention and not for the purpose of limiting the same, and other modifications or equivalent substitutions made by those skilled in the art to the technical solutions of the present invention should be covered within the scope of the claims of the present invention without departing from the spirit and scope of the technical solutions of the present invention.
Claims (9)
1. The utility model provides a biliquid rapid hardening slip casting consolidates inorganic material which characterized in that: the double-component inorganic material comprises a component A and a component B, and is prepared from the following raw materials in parts by weight:
the component A comprises 15-30 parts of cement, 20-40 parts of plugging agent, 3-10 parts of inorganic permeable crystallization active master batch, 40-50 parts of fly ash and 0.3-0.5 part of cellulose ether;
the component B comprises 30-50 parts of calcium oxide, 40-60 parts of talcum powder, 8-10 parts of accelerating agent and 0.5-1 part of naphthalene-based superplasticizer;
weighing inorganic materials of the component A and the component B according to parts by weight, respectively adding water, mixing and stirring, and then mixing the inorganic materials according to the weight ratio of 1: the mixture with the proportion of 1 can be used for grouting reinforcement.
2. The dual-fluid rapid-setting grouting reinforced inorganic material as claimed in claim 1, wherein: the cement is sulphoaluminate cement with the compressive strength of 50MPa or Portland cement with the label of 52.5.
3. The dual-fluid rapid-setting grouting reinforced inorganic material as claimed in claim 1, wherein: the inorganic infiltration crystallization active master batch is a cement-based infiltration crystallization active master batch.
4. The dual-fluid rapid-setting grouting reinforced inorganic material as claimed in claim 1, wherein: the plugging agent adopts F-type quick hydraulic powdery material with initial setting time not later than 3min and final setting time not later than 5 min.
5. The dual-fluid rapid-setting grouting reinforced inorganic material as claimed in claim 1, wherein: the reaction temperature of the component A and the component B is less than or equal to 65 ℃, and the grouting reinforcement strength after mixing is higher than 40 MPa.
6. The construction process of the double-fluid quick-setting grouting reinforcement inorganic material according to any one of the preceding claims, characterized in that: the method comprises the following steps:
s1, punching holes at the punched positions in the coal seam, putting a bag type hole sealing device and a high-pressure steel pipe into the drilled holes, connecting a slurry discharge port of a pneumatic grouting pump and the bag type hole sealing device together by using a quick connector, adding an inorganic hole sealing material into a mixing drum of the pneumatic grouting pump, and then, according to the weight ratio of the inorganic hole sealing material to water of 1: adding water according to the proportion of 1.2 for dilution, starting a pneumatic grouting pump after uniform stirring, and pulling out a quick connector to connect with other drill holes for grouting and hole sealing in sequence after grouting of the drill hole is finished;
s2, after embedding the high-pressure steel pipe into the drilled hole, pouring the prepared component A and component B in parts by weight into two pneumatic stirrers respectively and stirring uniformly, wherein the component A and the component B are respectively mixed according to the weight ratio of 0.35-0.8: 1, respectively adding water into the water-cement ratio, and uniformly stirring and mixing;
s3, putting two slurry suction pipes of the pneumatic double-fluid grouting pump into two mixers to suck A, B two slurries into a pump body according to a weight ratio of 1: the proportion of 1 is mixed at the grout outlet of the pneumatic double-liquid grouting pump, the pneumatic double-liquid grouting pump is started, the pressure is adjusted to 10MPa, and the double-liquid rapid-setting grouting reinforcement inorganic material formed after mixing is injected into the coal seam through a high-pressure steel pipe.
7. The construction process for reinforcing inorganic material by double-hydraulic quick-setting grouting according to claim 6, characterized in that: in the step S1, the drilling diameter of the drill hole is 75-90 mm, and the depth is 100 m; the outer diameter of the high-pressure steel pipe is 40 mm; the inorganic hole sealing material is a powdery micro-expansion hole sealing material which does not generate high temperature, has short solidification time and high compressive strength.
8. The construction process for reinforcing inorganic material by double-hydraulic quick-setting grouting according to claim 6, characterized in that: in step S1, the structure of the bag type hole packer includes: a grouting pipe with the outer diameter of 16mm and the inner diameter of 12mm, wherein two ends of the grouting pipe are respectively provided with a bag woven by nylon fiber yarns and a blasting valve positioned in the middle of the grouting pipe; the structure of pneumatic slip casting pump includes: the grouting pump body, a mixing drum, a pneumatic stirrer and a pressure limiting valve.
9. The construction process for reinforcing inorganic material by double-hydraulic quick-setting grouting according to claim 6, characterized in that: in the step S2, the pneumatic double-liquid grouting pump consists of two slurry suction pipes and one grouting pipe, the working pressure is 0.3-0.8MPa, and the slurry outlet pressure is adjustable within the range of 0-100 MPa.
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Application publication date: 20220503 |