CN115321894A - Mining filling material and preparation method and application thereof - Google Patents

Mining filling material and preparation method and application thereof Download PDF

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Publication number
CN115321894A
CN115321894A CN202210980800.9A CN202210980800A CN115321894A CN 115321894 A CN115321894 A CN 115321894A CN 202210980800 A CN202210980800 A CN 202210980800A CN 115321894 A CN115321894 A CN 115321894A
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China
Prior art keywords
filling material
parts
mining filling
mining
compound
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CN202210980800.9A
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Chinese (zh)
Inventor
梁登峰
王亚林
丁威
杨书俊
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Shanxi Sitong Jinye Engineering Co ltd
Shanxi Sitong Jinye Technology Co ltd
Original Assignee
Shanxi Sitong Jinye Engineering Co ltd
Shanxi Sitong Jinye Technology Co ltd
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Priority to CN202210980800.9A priority Critical patent/CN115321894A/en
Publication of CN115321894A publication Critical patent/CN115321894A/en
Pending legal-status Critical Current

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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
    • 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
    • C04B14/00—Use of inorganic materials as fillers, e.g. pigments, for mortars, concrete or artificial stone; Treatment of inorganic materials specially adapted to enhance their filling properties in mortars, concrete or artificial stone
    • C04B14/02—Granular materials, e.g. microballoons
    • C04B14/04—Silica-rich materials; Silicates
    • C04B14/10—Clay
    • C04B14/104—Bentonite, e.g. montmorillonite
    • 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
    • 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
    • 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 application relates to the technical field of mining materials, and particularly discloses a mining filling material and a preparation method and application thereof. The mining filling material comprises the following raw materials in parts by weight: 80-120 parts of gypsum, 8-12 parts of cement, 0.02-0.08 part of efficient superplasticizer, 0.03-0.07 part of expanding agent, 0.01-0.07 part of retarder, 6-15 parts of fly ash, 6-10 parts of carbide slag and 15-45 parts of compound, wherein the compound is formed by compounding nano silicon dioxide and sodium-based montmorillonite; the preparation method comprises the following steps: uniformly mixing gypsum, cement, a high-efficiency superplasticizer, an expanding agent, a retarder, fly ash, carbide slag and a compound, and crushing to obtain the mining filling material. The mining filling material has the advantage of improving the compressive strength of the mining filling material through the synergistic effect of the raw materials.

Description

Mining filling material and preparation method and application thereof
Technical Field
The application relates to the technical field of mining materials, in particular to a mining filling material and a preparation method and application thereof.
Background
The filling material for the mine is developed for improving the construction speed of underground sealing and cavity filling of the coal mine and improving the production efficiency, has good gas isolation and foaming performance, and is widely applied to areas such as sealing of the coal mine and a tunnel, filling of coal rock cavities and coal seam cracks, construction of a firewall, blocking of toxic and harmful gases, roof caving support and the like.
In the existing coal mine rock filling materials, a pure organic polymer material, namely a polyurethane foam filling material, has the defects of high material elasticity, strong binding power and good sealing performance, but has the defects of high cost, low compressive strength and long setting time, so that the development of a mining filling material with quick setting time and high compressive strength is urgently needed.
Disclosure of Invention
In order to improve the compressive strength of the mining filling material, the application provides the mining filling material and a preparation method and application thereof.
In a first aspect, the present application provides a mining filling material, which adopts the following technical scheme:
a mining filling material comprises the following raw materials in parts by weight: 80-120 parts of gypsum, 8-12 parts of cement, 0.02-0.08 part of efficient superplasticizer, 0.03-0.07 part of expanding agent, 0.01-0.07 part of retarder, 6-15 parts of fly ash, 6-10 parts of carbide slag and 15-45 parts of compound, wherein the compound is formed by compounding nano silicon dioxide and sodium-based montmorillonite.
By adopting the technical scheme, the mining filling material shortens the setting time and improves the compressive strength through the synergistic effect of the raw materials, wherein the setting time is 10-28min, the compressive strength at 1d is 4.7-7.8MPa, the compressive strength at 3d is 6.3-9.5MPa, and the compressive strength at 7d is 9.5-13.6MPa.
The gypsum is used as a basic component, and the efficient superplasticizer can achieve a good plasticizing effect; the expanding agent can play a role in expansion; the retarder can play a role in retarding. The fly ash has good volcanic ash activity, can replace part of cement, reduces the cost of the filling material, and can improve the compressive strength of the filling material. The fly ash and the carbide slag have a synergistic effect, and the compressive strength of the filling material can be further improved. Calcium hydroxide is contained in the carbide slag, so that environment alkalinity can be provided, and a higher pH value is provided for excitation of the fly ash; and calcium hydroxide in the carbide slag is diffused to the periphery of the fly ash glass body, so that the glass body in the fly ash can be effectively destroyed, active silicon dioxide and aluminum oxide in the fly ash are released, calcium ions can be combined with Si-O bonds and Al-O bonds in an alkaline environment, calcium silicate hydrate is generated after reaction, the calcium silicate hydrate has the characteristics of small porosity and small solubility, and can be filled in gaps of gypsum, and the compressive strength of the filling material is further improved.
The composite is formed by compounding nano silicon dioxide and sodium-based montmorillonite, wherein the sodium-based montmorillonite has good expansion type, thermal stability and higher compressive strength, and can be applied to the raw materials of the mining filling material to improve the compressive strength of the filling material. The nano-silica has a strong volcanic ash effect, can promote the development of hydration, and has high strength. After the nano silicon dioxide and the sodium-based montmorillonite are compounded, the free expansion rate of the sodium-based montmorillonite can be improved, the coagulation speed is accelerated, the coagulation time is shortened, and the compressive strength of the mining filling material is further improved through the synergistic effect of the nano silicon dioxide and the sodium-based montmorillonite.
Preferably, the method comprises the following steps: the feed comprises the following raw materials in parts by weight: 90-110 parts of gypsum, 9-11 parts of cement, 0.04-0.06 part of efficient superplasticizer, 0.04-0.06 part of expanding agent, 0.03-0.05 part of retarder, 8-10 parts of fly ash, 7-9 parts of carbide slag and 20-35 parts of compound.
By adopting the technical scheme, the mixing amount of gypsum, cement, high-efficiency superplasticizer, expanding agent, retarder, fly ash, carbide slag and compound is optimized, so that the raw materials can better play a role, and the compressive strength of the filling material can be improved.
Preferably, the method comprises the following steps: the compound is prepared by the following method: the sodium-based montmorillonite is put into N, N-dimethylformamide, ultrasonically dispersed, added with nano-silica, uniformly mixed, filtered, washed and dried to obtain the compound.
Further, the compound is prepared by the following method: putting sodium-based montmorillonite into N, N-dimethylformamide, ultrasonically dispersing for 20-30min, adding nano-silica, stirring for 10-20min, filtering, washing with anhydrous ethanol for 3-5 times, and drying to obtain a compound;
wherein the addition amount of N, N-dimethylformamide in each 1g of sodium-based montmorillonite is 6-8mL.
By adopting the technical scheme, the compound is prepared by the preparation method, so that the compound can better play a role, and the compressive strength of the filling material is improved.
Preferably, the method comprises the following steps: the weight ratio of the sodium-based montmorillonite to the nano-silica is 1: (0.2-0.3).
By adopting the technical scheme, the specific surface energy of the surface of the nano silicon dioxide is large, and the addition amount is too large, so that self agglomeration can be generated, and the function of the nano silicon dioxide is influenced, therefore, the addition amounts of the sodium-based montmorillonite and the nano silicon dioxide are limited within the range, the larger function can be exerted, and the compressive strength of the filling material is improved.
Preferably, the method comprises the following steps: the nanosilica is pretreated before use by the following method: and (2) putting the nano silicon dioxide into an ethanol solution, performing ultrasonic dispersion, adding a silane coupling agent, uniformly mixing, filtering solids, washing and drying to obtain the pretreated nano silicon dioxide.
Further, the nano-silica is pretreated by the following method before use: putting the nano silicon dioxide into an ethanol solution, performing ultrasonic dispersion for 30-40min, adding a silane coupling agent, stirring for 10-20min, filtering solids, washing for 3-5 times by using water, and drying to obtain pretreated nano silicon dioxide;
wherein the mass fraction of the ethanol solution is 20-30%, and the addition amount of the ethanol solution in each 1g of nano silicon dioxide is 8-12mL; the weight ratio of the nano silicon dioxide to the silane coupling agent is 1: (0.4-0.6).
By adopting the technical scheme, the specific surface energy of the nano silicon dioxide is large, self-aggregation is easy to generate, the silane coupling agent is utilized to pretreat the nano silicon dioxide, the specific surface energy of the surface of the nano silicon dioxide can be reduced, the dispersity of the nano silicon dioxide can be enhanced, the nano silicon dioxide can play a role conveniently, and the compressive strength of the filling material is further improved.
Preferably, the method comprises the following steps: the carbide slag is pretreated by the following method before use: and (3) putting the carbide slag into a hydrochloric acid solution, uniformly mixing, carrying out an aging reaction, taking out solids, washing and drying to obtain the pretreated carbide slag.
Further, the carbide slag is pretreated by the following method before use: putting the carbide slag into a hydrochloric acid solution, stirring for 10-15min, carrying out an aging reaction for 2-4h, taking out a solid, washing for 3-5 times by using a sodium hydroxide solution, and drying to obtain pretreated carbide slag;
wherein the mass fraction of the hydrochloric acid solution is 70-90%, the addition amount of the hydrochloric acid solution in every 1g of carbide slag is 8-12mL, and the mass fraction of the sodium hydroxide solution is 70-90%.
By adopting the technical scheme, the carbide slag is pretreated, the pretreated carbide slag contains certain calcium hydroxide, the ratio of calcium to silicon in the C-S-H gel is increased along with the improvement of the silicon hydroxide, the appearance of the C-S-H gel is also related to the concentration of the calcium hydroxide, when the concentration of the calcium hydroxide reaches a certain value, more fibrous and network C-S-H gels can be generated and can form a tighter continuous cross-connection combination together with needle-shaped ettringite crystals and hexagonal plate-shaped calcium hydroxide crystals, so that the compressive strength of the filling material is improved.
Preferably, the method comprises the following steps: the efficient superplasticizer is a polycarboxylic acid superplasticizer; the swelling agent is a UEA swelling agent; the retarder is one or more of sodium carboxymethylcellulose, carboxyethyl cellulose and disodium hydrogen phosphate.
By adopting the technical scheme, the efficient superplasticizer, the expanding agent and the retarder are limited, and the compressive strength of the filling material is further improved.
In a second aspect, the application provides a preparation method of a mining filling material, which adopts the following technical scheme:
a preparation method of a mining filling material comprises the following steps:
uniformly mixing gypsum, cement, a high-efficiency superplasticizer, an expanding agent, a retarder, fly ash, carbide slag and a compound, and crushing to obtain the mining filling material.
Further, the preparation method of the mining filling material comprises the following steps:
mixing gypsum, cement, a high-efficiency superplasticizer, an expanding agent, a retarder, fly ash, carbide slag and a compound, stirring for 20-30min, crushing, and sieving with a 80-120-mesh sieve to obtain the mining filling material.
By adopting the technical scheme, the raw materials are uniformly mixed and crushed to prepare the mining filling material, so that the mining filling material is convenient to use.
In a third aspect, the present application provides an application of a mining filling material, which adopts the following technical scheme:
the application of the filling material for the mine comprises the following steps: the mine filling material is uniformly mixed with water to obtain slurry, and then the part needing to be filled is filled.
By adopting the technical scheme, the rainwater of the mining filling material is uniformly mixed, and then the part needing to be filled is filled, so that the filling material can be rapidly expanded and condensed, and rapid filling is realized.
Preferably, the method comprises the following steps: the weight ratio of the water to the mining filling material is (0.6-0.8): 1.
by adopting the technical scheme, the mixing amount of water and the mining filling material is limited, the setting time can be shortened, and the operation is facilitated.
In summary, the present application includes at least one of the following beneficial technical effects:
1. because the sodium-based montmorillonite and the nano-silica are compounded to form the compound, the setting time can be shortened, and the compressive strength of the filling material can be improved, wherein the setting time is shortened to 10min, the 1d compressive strength reaches 7.8MPa, the 3d compressive strength reaches 9.5MPa, and the 7d compressive strength reaches 13.6MPa.
2. In the application, the carbide slag is preferably pretreated, and the pretreated carbide slag, the ettringite crystal and the calcium hydroxide crystal can jointly form a tighter intergrowth cross combination, so that the compressive strength of the filling material is improved.
Detailed Description
The present application is described in further detail below with reference to specific contents.
Raw materials
The high-efficiency superplasticizer is a TH-928 polycarboxylic acid superplasticizer; the swelling agent is UEA swelling agent; the retarder is sodium carboxymethylcellulose.
Preparation example
Preparation example 1
A composite prepared by the following method:
2kg of sodium montmorillonite is put into 14L N, N-dimethylformamide, ultrasonic dispersion is carried out for 25min, 0.4kg of nano silicon dioxide is added, stirring is carried out for 15min, filtering is carried out, absolute ethyl alcohol is used for washing for 5 times, and drying is carried out to obtain the compound.
Preparation example 2
A composite, which is different from preparation example 1 in the amount of nano-silica added, was prepared in preparation example 2 in an amount of 0.5kg, and the remainder was the same as in preparation example 1.
Preparation example 3
A composite, which is different from preparation example 1 in the amount of nano-silica added, was prepared in preparation example 3 in an amount of 0.6kg, and the remainder was the same as in preparation example 1.
Examples
Example 1
The raw material proportion of the mining filling material is shown in table 1.
A preparation method of a mining filling material comprises the following steps:
mixing gypsum, cement, a high-efficiency superplasticizer, an expanding agent, a retarder, fly ash and carbide slag and the compound prepared in the preparation example 1, stirring for 25min, crushing and sieving with a 100-mesh sieve to obtain the mine filling material.
Examples 2 to 5
The difference between the filling material for the mine and the embodiment 1 is that the raw material proportion of the filling material is different, and the raw material proportion is shown in a table 1.
TABLE 1 examples 1-5 amounts of respective materials (unit: kg) blended in the dispersant
Raw materials Example 1 Example 2 Example 3 Example 4 Example 5
Gypsum plaster 80 80 80 80 80
Cement 8 8 8 8 8
High-efficiency superplasticizer 0.02 0.02 0.02 0.02 0.02
Expanding agent 0.03 0.03 0.03 0.03 0.03
Retarder 0.01 0.01 0.01 0.01 0.01
Fly ash 6 6 6 6 6
Carbide slag 6 6 6 6 6
Composite material 15 20 30 35 45
Examples 6 to 9
A mining filling material is different from the filling material in the embodiment 5 in the raw material ratio shown in the table 2.
TABLE 2 examples 6-9 dispersant the amount of each raw material (unit: kg)
Raw materials Example 6 Example 7 Example 8 Example 9
Gypsum plaster 90 100 105 110
Cement 9 10 11 12
High-efficiency superplasticizer 0.04 0.05 0.06 0.08
Expanding agent 0.04 0.05 0.06 0.07
Retarder 0.03 0.04 0.05 0.07
Fly ash 8 10 12 15
Carbide slag 7 8 9 10
Composite material 45 45 45 45
Example 10
A mining filling material, which is different from example 7 in that the origin of the compound in the filling material is different, and which was prepared by using preparation example 2.
Example 11
A mining filling material, which is different from example 7 in that the origin of the compound in the filling material is different, and which was prepared by using preparation example 3.
Example 12
A mining filler material, which differs from example 10 in that the nanosilica in the composite of the filler material is pre-treated prior to use by the following method: putting the nano silicon dioxide into an ethanol solution with the mass fraction of 25%, performing ultrasonic dispersion for 35min, adding a silane coupling agent, stirring for 15min, filtering solids, washing with water for 5 times, and drying to obtain pretreated nano silicon dioxide; wherein the addition amount of the ethanol solution in each 1g of the nano silicon dioxide is 10mL; the weight ratio of the nano silicon dioxide to the silane coupling agent is 1:0.5.
example 13
A mining filling material, which differs from example 12 in that the carbide slag in the filling material is pre-treated before use by the following method: putting the carbide slag into a hydrochloric acid solution with the mass fraction of 80%, stirring for 13min, carrying out an aging reaction for 3h, taking out solids, washing for 5 times by using a sodium hydroxide solution with the mass fraction of 80%, and drying to obtain pretreated carbide slag; wherein the addition amount of the hydrochloric acid solution in each 1g of carbide slag is 10mL.
Comparative example
Comparative example 1
A mining filling material which differs from example 1 in that no compound is added to the raw materials of the filling material.
Comparative example 2
A mining filling material is different from the mining filling material in the embodiment 1 in that the composite in the filling material is replaced by nano silicon dioxide in equal amount.
Comparative example 3
A mining filling material is different from the filling material in the embodiment 1 in that the compound in the filling material is replaced by sodium montmorillonite in equal amount.
Application example
Application example 1
The application of the mine filling material is characterized in that the mine filling material prepared in the embodiment 1 is added and uniformly mixed with water to obtain slurry, and then the part needing to be filled is filled; wherein the weight ratio of water to the mining filling material is 0.6.
Application examples 2 to 13
The application of the mining filling material is different from the application example 1 in that the mining filling material is respectively selected from the examples 2 to 13, and the other uniform application examples 1 are the same.
Application of comparative examples 1 to 3
The application of the mining filling material is different from the application example 1 in that the mining filling material is respectively selected from comparative examples 1-3, and the rest is the same as the application example 1.
Performance test
The following performance tests were carried out on the mine filling materials of application examples 1 to 13 and application comparative examples 1 to 3:
initial setting time and final setting time: the initial setting time and the final setting time of the mining filling material are measured according to GB/T1346-2001 'method for testing water consumption, setting time and safety of standard consistency of cement', and the detection results are shown in Table 3.
Compressive strength: according to GB/T17671-1999 cement mortar strength test method (ISO method), the compressive strength of the mining filling material is measured, and the detection results are shown in Table 3.
TABLE 3 test results
Figure BDA0003800353900000071
Figure BDA0003800353900000081
As can be seen from Table 3, the mining filling material of the application not only shortens the setting time, but also improves the compressive strength through the synergistic effect of the raw materials, wherein the setting time is 10-28min, the compressive strength of 1d is 4.7-7.8MPa, the compressive strength of 3d is 6.3-9.5MPa, and the compressive strength of 7d is 9.5-13.6MPa.
By combining application example 1 and comparative examples 1 to 3, it can be seen that the filling material in application example 1 has a setting time of 28min, a compressive strength of 1d of 4.7MPa, a compressive strength of 3d of 6.3MPa and a compressive strength of 7d of 9.5MPa, which is superior to application comparative examples 1 to 3, and shows that the raw materials of the mining filling material are more suitable for adopting nano silica and sodium-based montmorillonite as a compound, so that the setting time can be shortened, and the compressive strength can be improved.
It can be seen from the combination of application examples 1 to 5 that the setting time of the filling material in application example 5 was 24min, the compressive strength at 1d was 5.6MPa, the compressive strength at 3d was 7.6MPa, and the compressive strength at 7d was 11.5MPa, which is superior to that of the other application examples, indicating that the addition amount of the composite in application example 5 is more appropriate, and not only the setting time can be shortened, but also the compressive strength can be improved.
In combination with application examples 6-9, it can be seen that the addition amount of other raw materials in the raw materials of the filling material has little influence on the performance of the filling material except for the composite.
It can be seen from combination of application example 7 and application examples 10 to 11 that the setting time of the filling material in application example 10 was 15min, the compressive strength of 1d was 7.2mpa, the compressive strength of 3d was 8.8mpa, and the compressive strength of 7d was 12.8MPa, which are superior to those of the other application examples, indicating that the composite prepared by preparation example 2 is more suitable, and not only the setting time can be shortened, but also the compressive strength can be improved.
Combining application examples 10 and 12, it can be seen that the filling material in application example 12 has a setting time of 14min, a compressive strength of 1d of 7.4mpa, a compressive strength of 3d of 9.1mpa, and a compressive strength of 7d of 13.1MPa, which is superior to other application examples, and shows that the nano-silica in the composite raw material is more suitable to be pretreated before use, so that the setting time can be shortened, and the compressive strength can be improved.
It can be seen from the combination of application examples 12 to 13 that the setting time of the filling material in application example 13 is 10min, the 1d compressive strength is 7.8MPa, the 3d compressive strength is 9.5MPa, and the 7d compressive strength is 13.6MPa, which is superior to other application examples, and shows that the carbide slag is more suitably pretreated before use, so that the setting time can be shortened, and the compressive strength can be improved.
The embodiments of the present invention are preferred embodiments of the present application, and the scope of the present application is not limited by the embodiments of the present application, so: equivalent changes in structure, shape and principle of the present application shall be covered by the protection scope of the present application.

Claims (10)

1. A mining filling material is characterized in that: the feed comprises the following raw materials in parts by weight: 80-120 parts of gypsum, 8-12 parts of cement, 0.02-0.08 part of efficient superplasticizer, 0.03-0.07 part of expanding agent, 0.01-0.07 part of retarder, 6-15 parts of fly ash, 6-10 parts of carbide slag and 15-45 parts of compound, wherein the compound is formed by compounding nano silicon dioxide and sodium-based montmorillonite.
2. The mining filling material as claimed in claim 1, wherein: the feed comprises the following raw materials in parts by weight: 90-110 parts of gypsum, 9-11 parts of cement, 0.04-0.06 part of efficient superplasticizer, 0.04-0.06 part of expanding agent, 0.03-0.05 part of retarder, 8-10 parts of fly ash, 7-9 parts of carbide slag and 20-35 parts of compound.
3. The mining filling material of claim 1, wherein: the compound is prepared by the following method: the sodium-based montmorillonite is put into N, N-dimethylformamide, ultrasonically dispersed, added with nano-silica, uniformly mixed, filtered, washed and dried to obtain the compound.
4. The mining filling material of claim 3, wherein: the weight ratio of the sodium-based montmorillonite to the nano-silica is 1: (0.2-0.3).
5. The mining filling material of claim 3, wherein: the nanosilica is pretreated before use by the following method: and (2) putting the nano silicon dioxide into an ethanol solution, performing ultrasonic dispersion, adding a silane coupling agent, uniformly mixing, filtering solids, washing and drying to obtain the pretreated nano silicon dioxide.
6. The mining filling material of claim 1, wherein: the carbide slag is pretreated by the following method before use: and (3) putting the carbide slag into a hydrochloric acid solution, uniformly mixing, carrying out an aging reaction, taking out solids, washing, and drying to obtain the pretreated carbide slag.
7. The mining filling material of claim 1, wherein: the efficient superplasticizer is a polycarboxylic acid superplasticizer; the swelling agent is a UEA swelling agent; the retarder is one or more of sodium carboxymethylcellulose, carboxyethyl cellulose and disodium hydrogen phosphate.
8. A method for preparing a mining filling material according to any one of claims 1 to 7, comprising the steps of:
uniformly mixing gypsum, cement, a high-efficiency superplasticizer, an expanding agent, a retarder, fly ash, carbide slag and a compound, and crushing to obtain the mining filling material.
9. The application of the mining filling material is characterized by comprising the following steps: the mining filling material of any one of claims 1 to 7 is mixed with water uniformly to obtain slurry, and then the part to be filled is poured.
10. The use of a mining filling material according to claim 9, characterized in that: the weight ratio of the water to the mining filling material is (0.6-0.8): 1.
CN202210980800.9A 2022-08-16 2022-08-16 Mining filling material and preparation method and application thereof Pending CN115321894A (en)

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CN103979915A (en) * 2014-05-30 2014-08-13 山西凝固力新型材料有限公司 Fly-ash-base filling material
CN106698984A (en) * 2017-02-07 2017-05-24 山东科技大学 Application of carbide slag solid wastes as raw materials for preparing mineral filling gel material, filling gel material and filling material
CN110526650A (en) * 2019-09-24 2019-12-03 莱西市星脉先进材料技术中心 A kind of preparation method of high-intensity heat insulating material

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KR20140017247A (en) * 2012-07-31 2014-02-11 주식회사 제철세라믹 High durable cement for semi-rigid pavement having chloride resistant cement and semi-rigid pavement method using filling the same in asphalt with vibrating
CN102757206A (en) * 2012-08-10 2012-10-31 安徽省煤田地质局第一勘探队 Mine fracture grouting material and usage method thereof
CN103979915A (en) * 2014-05-30 2014-08-13 山西凝固力新型材料有限公司 Fly-ash-base filling material
CN106698984A (en) * 2017-02-07 2017-05-24 山东科技大学 Application of carbide slag solid wastes as raw materials for preparing mineral filling gel material, filling gel material and filling material
CN110526650A (en) * 2019-09-24 2019-12-03 莱西市星脉先进材料技术中心 A kind of preparation method of high-intensity heat insulating material

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