CN116161938A - Filling material for mine filling exploitation - Google Patents
Filling material for mine filling exploitation Download PDFInfo
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- CN116161938A CN116161938A CN202211739742.7A CN202211739742A CN116161938A CN 116161938 A CN116161938 A CN 116161938A CN 202211739742 A CN202211739742 A CN 202211739742A CN 116161938 A CN116161938 A CN 116161938A
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- parts
- straw
- red mud
- water reducer
- filling material
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- 238000011049 filling Methods 0.000 title claims abstract description 80
- 239000000463 material Substances 0.000 title claims abstract description 50
- 239000010902 straw Substances 0.000 claims abstract description 82
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 67
- 239000003638 chemical reducing agent Substances 0.000 claims abstract description 65
- 239000010881 fly ash Substances 0.000 claims abstract description 28
- 239000002893 slag Substances 0.000 claims abstract description 19
- GCLGEJMYGQKIIW-UHFFFAOYSA-H sodium hexametaphosphate Chemical compound [Na]OP1(=O)OP(=O)(O[Na])OP(=O)(O[Na])OP(=O)(O[Na])OP(=O)(O[Na])OP(=O)(O[Na])O1 GCLGEJMYGQKIIW-UHFFFAOYSA-H 0.000 claims abstract description 18
- 235000019982 sodium hexametaphosphate Nutrition 0.000 claims abstract description 18
- 239000001577 tetrasodium phosphonato phosphate Substances 0.000 claims abstract description 18
- 239000004568 cement Substances 0.000 claims abstract description 16
- 229920002401 polyacrylamide Polymers 0.000 claims abstract description 16
- 239000003513 alkali Substances 0.000 claims abstract description 11
- 238000000227 grinding Methods 0.000 claims abstract description 11
- 229910052602 gypsum Inorganic materials 0.000 claims abstract description 9
- 239000010440 gypsum Substances 0.000 claims abstract description 9
- 239000002994 raw material Substances 0.000 claims abstract description 9
- 239000000843 powder Substances 0.000 claims description 46
- 238000001035 drying Methods 0.000 claims description 23
- 238000001238 wet grinding Methods 0.000 claims description 23
- 238000001914 filtration Methods 0.000 claims description 15
- 238000002360 preparation method Methods 0.000 claims description 15
- WPJGWJITSIEFRP-UHFFFAOYSA-N 1,3,5-triazine-2,4,6-triamine;hydrate Chemical compound O.NC1=NC(N)=NC(N)=N1 WPJGWJITSIEFRP-UHFFFAOYSA-N 0.000 claims description 8
- 229920001732 Lignosulfonate Polymers 0.000 claims description 8
- 229920000459 Nitrile rubber Polymers 0.000 claims description 8
- 239000002253 acid Substances 0.000 claims description 8
- 238000001354 calcination Methods 0.000 claims description 8
- 235000014113 dietary fatty acids Nutrition 0.000 claims description 8
- 239000000194 fatty acid Substances 0.000 claims description 8
- 229930195729 fatty acid Natural products 0.000 claims description 8
- 150000004665 fatty acids Chemical class 0.000 claims description 8
- 239000007788 liquid Substances 0.000 claims description 8
- DGVVJWXRCWCCOD-UHFFFAOYSA-N naphthalene;hydrate Chemical compound O.C1=CC=CC2=CC=CC=C21 DGVVJWXRCWCCOD-UHFFFAOYSA-N 0.000 claims description 8
- 239000002245 particle Substances 0.000 claims description 8
- 238000003756 stirring Methods 0.000 claims description 8
- IIACRCGMVDHOTQ-UHFFFAOYSA-M sulfamate Chemical compound NS([O-])(=O)=O IIACRCGMVDHOTQ-UHFFFAOYSA-M 0.000 claims description 8
- 238000001816 cooling Methods 0.000 claims description 7
- 239000008367 deionised water Substances 0.000 claims description 7
- 229910021641 deionized water Inorganic materials 0.000 claims description 7
- 238000010438 heat treatment Methods 0.000 claims description 7
- 238000002156 mixing Methods 0.000 claims description 7
- 238000007873 sieving Methods 0.000 claims description 7
- 238000002791 soaking Methods 0.000 claims description 7
- 238000010025 steaming Methods 0.000 claims description 7
- 238000009210 therapy by ultrasound Methods 0.000 claims description 7
- 238000005406 washing Methods 0.000 claims description 7
- 238000009835 boiling Methods 0.000 claims description 5
- 238000009837 dry grinding Methods 0.000 claims 1
- 238000004519 manufacturing process Methods 0.000 claims 1
- 239000000378 calcium silicate Substances 0.000 abstract description 7
- 229910052918 calcium silicate Inorganic materials 0.000 abstract description 7
- OYACROKNLOSFPA-UHFFFAOYSA-N calcium;dioxido(oxo)silane Chemical compound [Ca+2].[O-][Si]([O-])=O OYACROKNLOSFPA-UHFFFAOYSA-N 0.000 abstract description 7
- XFWJKVMFIVXPKK-UHFFFAOYSA-N calcium;oxido(oxo)alumane Chemical compound [Ca+2].[O-][Al]=O.[O-][Al]=O XFWJKVMFIVXPKK-UHFFFAOYSA-N 0.000 abstract description 6
- 230000000694 effects Effects 0.000 abstract description 6
- LIVNPJMFVYWSIS-UHFFFAOYSA-N silicon monoxide Inorganic materials [Si-]#[O+] LIVNPJMFVYWSIS-UHFFFAOYSA-N 0.000 abstract description 6
- 230000002195 synergetic effect Effects 0.000 abstract description 4
- 229910018557 Si O Inorganic materials 0.000 abstract description 3
- 239000011575 calcium Substances 0.000 abstract description 3
- 230000000887 hydrating effect Effects 0.000 abstract description 3
- 230000008093 supporting effect Effects 0.000 abstract description 3
- 238000005728 strengthening Methods 0.000 abstract 1
- 238000000034 method Methods 0.000 description 7
- 238000005065 mining Methods 0.000 description 5
- 229910018072 Al 2 O 3 Inorganic materials 0.000 description 4
- 230000006872 improvement Effects 0.000 description 4
- 230000008569 process Effects 0.000 description 4
- 230000003014 reinforcing effect Effects 0.000 description 4
- 239000004576 sand Substances 0.000 description 4
- 230000002776 aggregation Effects 0.000 description 3
- 230000009471 action Effects 0.000 description 2
- 230000003213 activating effect Effects 0.000 description 2
- 238000005054 agglomeration Methods 0.000 description 2
- 239000003245 coal Substances 0.000 description 2
- 238000009833 condensation Methods 0.000 description 2
- 230000005494 condensation Effects 0.000 description 2
- 238000005336 cracking Methods 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 239000000835 fiber Substances 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 229910004298 SiO 2 Inorganic materials 0.000 description 1
- 238000004220 aggregation Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 238000012669 compression test Methods 0.000 description 1
- 239000010419 fine particle Substances 0.000 description 1
- 238000001879 gelation Methods 0.000 description 1
- 239000003673 groundwater Substances 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- 125000002887 hydroxy group Chemical group [H]O* 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 239000004575 stone Substances 0.000 description 1
- 238000010998 test method Methods 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
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
- C04B28/14—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 calcium sulfate cements
- C04B28/142—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 calcium sulfate cements containing synthetic or waste calcium sulfate cements
- C04B28/144—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 calcium sulfate cements containing synthetic or waste calcium sulfate cements the synthetic calcium sulfate being a flue gas desulfurization product
-
- 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
- C04B20/00—Use of materials as fillers for mortars, concrete or artificial stone according to more than one of groups C04B14/00 - C04B18/00 and characterised by shape or grain distribution; Treatment of materials according to more than one of the groups C04B14/00 - C04B18/00 specially adapted to enhance their filling properties in mortars, concrete or artificial stone; Expanding or defibrillating materials
- C04B20/02—Treatment
- C04B20/023—Chemical treatment
-
- 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
- C04B20/00—Use of materials as fillers for mortars, concrete or artificial stone according to more than one of groups C04B14/00 - C04B18/00 and characterised by shape or grain distribution; Treatment of materials according to more than one of the groups C04B14/00 - C04B18/00 specially adapted to enhance their filling properties in mortars, concrete or artificial stone; Expanding or defibrillating materials
- C04B20/02—Treatment
- C04B20/04—Heat treatment
-
- 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
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Structural Engineering (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Inorganic Chemistry (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- General Chemical & Material Sciences (AREA)
- Soil Conditioners And Soil-Stabilizing Materials (AREA)
- Processing Of Solid Wastes (AREA)
Abstract
The invention relates to a filling material for mine filling exploitation, which is prepared from the following raw materials in parts by weight: 250-300 parts of tailing slag, 20-60 parts of cement, 4-15 parts of water reducer, 50-100 parts of desulfurized gypsum, 100-130 parts of fly ash, 80-160 parts of gangue, 30-80 parts of activated red mud, 10-20 parts of polyacrylamide, 15-20 parts of sodium hexametaphosphate and 30-60 parts of modified straw. The invention promotes the fracture of Si-O, al-O bond in the fly ash by the gelatinization and strong alkalinity of the red mud, and the fly ash reacts with alkali to generate hydrated calcium silicate and calcium silicate which can increase the strength of the system by adding the strengthening effect in the grinding processHydrated calcium aluminate; and hydrating the generated Ca (OH) 2 The calcium silicate hydrate and the calcium aluminate hydrate are aggregated with the red mud, so that the system has better cementing performance under the synergistic promotion of cement, and can play a certain supporting role to indirectly improve the mechanical performance.
Description
Technical Field
The invention relates to the technical field of filling materials, in particular to a filling material for mine filling exploitation.
Background
The mining industry is in the time of taking resources, forms a large amount of goafs, and the unstability collapse or collapse of goafs makes a large amount of lands and vegetation damaged, even causes the incident, and a large amount of tailing sand produced by mining simultaneously has extremely fine particles, large component fluctuation and difficult utilization, and the tailing sand which cannot be utilized is piled into a tailing mine, so that not only is the resources extremely wasted, but also the environment is greatly polluted, and the ore deposit is mined by a filling method, thereby protecting the earth surface from collapsing, and realizing the most reliable technical support for the coordinated development of the mining industry and the environment.
The existing filling material generally adopts waste stone or tailings as filling aggregate, cement is used as cementing agent, but cement, natural sand and rod sanding have high cost, filling is difficult to ensure full, gaps exist in an internal structure, defects of poor mechanical properties and the like exist, the problems of collapse and the like occur after filling, and the filling effect is extremely poor.
Disclosure of Invention
Aiming at the defects existing in the prior art, the invention provides a filling material for mine filling exploitation, which has the following specific technical scheme:
the filling material for mine filling exploitation is prepared from the following raw materials in parts by weight: 250-300 parts of tailing slag, 20-60 parts of cement, 4-15 parts of water reducer, 50-100 parts of desulfurized gypsum, 100-130 parts of fly ash, 80-160 parts of gangue, 30-80 parts of activated red mud, 10-20 parts of polyacrylamide, 15-20 parts of sodium hexametaphosphate and 30-60 parts of modified straw.
As an improvement of the technical scheme, the water reducer is at least one of lignosulfonate water reducer, naphthalene water reducer, melamine water reducer, sulfamate water reducer, fatty acid water reducer and polycarboxylic acid water reducer.
As improvement of the technical scheme, the activated red mud is calcined red mud, and the activated red mud is prepared by calcining red mud at 750-850 ℃.
As an improvement of the technical proposal, the particle size of the activated red mud is 200-300 meshes
The preparation method of the filling material for mine filling exploitation comprises the following steps that S1, the tailing slag, the fly ash and the gangue are put into a pulverizer to be dry-ground until the powder A can be obtained through a 300-mesh sieve;
s2, placing the powder A into a wet grinding machine, adding polyacrylamide, sodium hexametaphosphate, modified straw and a proper amount of water, starting wet grinding, and filtering a grinding body after the wet grinding is finished to obtain powder B;
s3, uniformly stirring the powder B by using a stirrer to obtain the filling material
As improvement of the technical scheme, the preparation method of the modified straw comprises the steps of washing and drying the straw, crushing, soaking in deionized water, sieving with a 100-150-mesh sieve after drying, steaming with alkali liquor, and drying to obtain straw powder; mixing the treated straw powder with hydroxyl-terminated liquid nitrile rubber, carrying out ultrasonic treatment, heating to 100-120 ℃, and reacting for 2-4.5 h; cooling to room temperature, filtering and drying to obtain the modified straw.
The invention has the beneficial effects that:
the gelation and strong alkalinity of the red mud promote the fracture of Si-O, al-O bond in the fly ash, and the reinforcing effect in the grinding process is added, so that the active SiO in the fly ash is obtained 2 、Al 2 O 3 Reacting with alkali to generate hydrated calcium silicate and hydrated calcium aluminate which can increase the system strength; and hydrating the generated Ca (OH) 2 Can diffuse to the periphery of the fly ash body to further destroy the structure of the fly ash so as to lead the active SiO to be active 2 、Al 2 O 3 The calcium silicate hydrate, the calcium aluminate hydrate and the red mud are polymerized together, so that the system has better cementing performance under the synergistic promotion effect of cement, the addition of the polyacrylamide and the sodium hexametaphosphate plays the role of activating to the greatest extent, and the strength of the filling material after condensation is improved, so that the collapse degree is reduced, a certain supporting effect can be achieved, and the cement filling material is stableThe mechanical properties are improved, the components serve as the admixture to fill the tail slag pores, the modified straw plays roles of reinforcing, toughening and adsorbing agglomeration in the process of the filling material, the strength of the filling material is increased, the later cracking of the filling material is prevented, large-scale dissipation can not occur under the action of groundwater, the method can be suitable for the treatment of various mine goafs with high water levels in a coal mining subsidence area, and the curing effect is ensured.
Detailed Description
The present invention will be described in further detail with reference to the following examples in order to make the objects, technical solutions and advantages of the present invention more apparent. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the invention.
Embodiment one:
the filling material for mine filling exploitation is prepared from the following raw materials in parts by weight: 250 parts of tailing slag, 20 parts of cement, 4 parts of water reducer, 50 parts of desulfurized gypsum, 100 parts of fly ash, 80 parts of gangue, 30 parts of activated red mud, 10 parts of polyacrylamide, 15 parts of sodium hexametaphosphate and 30 parts of modified straw.
Due to the gelatinization and strong alkalinity of the red mud, the fracture of Si-O, al-O bond in the fly ash is promoted, and the reinforcing effect in the grinding process is added, so that the active SiO in the fly ash is obtained 2 、Al 2 O 3 Reacting with alkali to generate hydrated calcium silicate and hydrated calcium aluminate which can increase the system strength; and hydrating the generated Ca (OH) 2 Can diffuse to the periphery of the fly ash body and further destroy the fly ash structure to enable the active SiO 2 、Al 2 O 3 The calcium silicate hydrate, the calcium aluminate hydrate and the red mud are polymerized together, the system has better cementing performance under the synergistic promotion effect of cement, the addition of the polyacrylamide and the sodium hexametaphosphate plays the role of activating to the greatest extent, the strength of the filling material after condensation is improved, so that the collapse degree is reduced, a certain supporting effect can be achieved, the mechanical performance is indirectly improved, and the components are used as the admixture to fill the tailing holesThe modified straw fiber plays roles of reinforcing, toughening and adsorbing aggregation in the process of the filling material, so that the strength of the filling material is increased, the later cracking of the filling material is prevented, large-scale dissipation can not occur under the action of underground water, the modified straw fiber can adapt to the treatment of various mine goafs with high water level in a coal mining subsidence area, and the curing effect is ensured.
Wherein the water reducer is at least one of lignosulfonate water reducer, naphthalene water reducer, melamine water reducer, sulfamate water reducer, fatty acid water reducer and polycarboxylic acid water reducer.
The activated red mud is calcined red mud, and the activated red mud is prepared by calcining red mud at 750 ℃.
Wherein the particle size of the activated red mud is 200 meshes.
The preparation method of the filling material for mine filling exploitation comprises the following steps that S1, the tailing slag, the fly ash and the gangue are put into a pulverizer to be dry-ground until the powder A can be obtained through a 300-mesh sieve;
s2, placing the powder A into a wet grinding machine, adding polyacrylamide, sodium hexametaphosphate, modified straw and a proper amount of water, starting wet grinding, and filtering a grinding body after the wet grinding is finished to obtain powder B;
and S3, uniformly stirring the powder B by using a stirrer to obtain the filling material.
The preparation method of the modified straw comprises the steps of washing, drying and crushing the straw, soaking the straw in deionized water, drying, sieving the straw with a 100-150-mesh sieve, steaming with alkali liquor, and drying to obtain straw powder; mixing the treated straw powder with hydroxyl-terminated liquid nitrile rubber, performing ultrasonic treatment, heating to 100 ℃, and reacting for 2 hours; cooling to room temperature, filtering and drying to obtain the modified straw.
After alkali liquor treatment, the internal structure of the straw is damaged and recombined to a certain extent, the structure is changed, the surface area is increased, hydroxyl in a molecular chain is exposed, and the hydroxyl-terminated liquid nitrile rubber is mixed to increase the grafting rate; and the hydrogen bond acting force after grafting modification is stronger, so that the network structure formed by the filling material is tighter, the strength of the filling material is enhanced, and the agglomeration force of the filling material is provided.
Embodiment two:
the filling material for mine filling exploitation is prepared from the following raw materials in parts by weight: 280 parts of tailing slag, 40 parts of cement, 9 parts of water reducer, 80 parts of desulfurized gypsum, 120 parts of fly ash, 120 parts of gangue, 60 parts of activated red mud, 15 parts of polyacrylamide, 18 parts of sodium hexametaphosphate and 45 parts of modified straw.
Wherein the water reducer is at least one of lignosulfonate water reducer, naphthalene water reducer, melamine water reducer, sulfamate water reducer, fatty acid water reducer and polycarboxylic acid water reducer.
The activated red mud is calcined red mud, and the activated red mud is prepared by calcining red mud at 800 ℃.
Wherein the particle size of the activated red mud is 250 meshes.
The preparation method of the filling material for mine filling exploitation comprises the following steps that S1, the tailing slag, the fly ash and the gangue are put into a pulverizer to be dry-ground until the powder A can be obtained through a 300-mesh sieve;
s2, placing the powder A into a wet grinding machine, adding polyacrylamide, sodium hexametaphosphate, modified straw and a proper amount of water, starting wet grinding, and filtering a grinding body after the wet grinding is finished to obtain powder B;
s3, uniformly stirring the powder B by using a stirrer to obtain the filling material
The preparation method of the modified straw comprises the steps of washing and drying the straw, crushing the straw, soaking the straw in deionized water, sieving the dried straw with a 100-150-mesh sieve, steaming and boiling the straw with alkali liquor, and drying the straw to obtain straw powder; mixing the treated straw powder with hydroxyl-terminated liquid nitrile rubber, performing ultrasonic treatment, heating to 110 ℃, and reacting for 3 hours; cooling to room temperature, filtering and drying to obtain the modified straw.
Embodiment III:
the filling material for mine filling exploitation is prepared from the following raw materials in parts by weight: 300 parts of tailing slag, 60 parts of cement, 15 parts of water reducer, 100 parts of desulfurized gypsum, 130 parts of fly ash, 160 parts of gangue, 80 parts of activated red mud, 20 parts of polyacrylamide, 20 parts of sodium hexametaphosphate and 60 parts of modified straw.
Wherein the water reducer is at least one of lignosulfonate water reducer, naphthalene water reducer, melamine water reducer, sulfamate water reducer, fatty acid water reducer and polycarboxylic acid water reducer.
The activated red mud is calcined red mud, and the activated red mud is prepared by calcining red mud at 850 ℃.
Wherein the particle size of the activated red mud is 300 meshes.
The preparation method of the filling material for mine filling exploitation comprises the following steps that S1, the tailing slag, the fly ash and the gangue are put into a pulverizer to be dry-ground until the powder A can be obtained through a 300-mesh sieve;
s2, placing the powder A into a wet grinding machine, adding polyacrylamide, sodium hexametaphosphate, modified straw and a proper amount of water, starting wet grinding, and filtering a grinding body after the wet grinding is finished to obtain powder B;
and S3, uniformly stirring the powder B by using a stirrer to obtain the filling material.
The preparation method of the modified straw comprises the steps of washing and drying the straw, crushing the straw, soaking the straw in deionized water, sieving the dried straw with a 100-150-mesh sieve, steaming and boiling the straw with alkali liquor, and drying the straw to obtain straw powder; mixing the treated straw powder with hydroxyl-terminated liquid nitrile rubber, carrying out ultrasonic treatment, heating to 120 ℃, and reacting for 2-4.5 h; cooling to room temperature, filtering and drying to obtain the modified straw.
Embodiment four:
the filling material for mine filling exploitation is prepared from the following raw materials in parts by weight: 300 parts of tailing slag, 60 parts of cement, 15 parts of water reducer, 100 parts of desulfurized gypsum, 130 parts of fly ash, 160 parts of gangue, 80 parts of activated red mud, 20 parts of sodium hexametaphosphate and 60 parts of modified straw.
Wherein the water reducer is at least one of lignosulfonate water reducer, naphthalene water reducer, melamine water reducer, sulfamate water reducer, fatty acid water reducer and polycarboxylic acid water reducer.
The activated red mud is calcined red mud, and the activated red mud is prepared by calcining red mud at 850 ℃.
Wherein the particle size of the activated red mud is 300 meshes.
The preparation method of the filling material for mine filling exploitation comprises the following steps that S1, the tailing slag, the fly ash and the gangue are put into a pulverizer to be dry-ground until the powder A can be obtained through a 300-mesh sieve;
s2, placing the powder A into a wet grinding machine, adding sodium hexametaphosphate, modified straw and a proper amount of water, starting wet grinding, and filtering a grinding body after the wet grinding is finished to obtain powder B;
and S3, uniformly stirring the powder B by using a stirrer to obtain the filling material.
The preparation method of the modified straw comprises the steps of washing and drying the straw, crushing the straw, soaking the straw in deionized water, sieving the dried straw with a 100-150-mesh sieve, steaming and boiling the straw with alkali liquor, and drying the straw to obtain straw powder; mixing the treated straw powder with hydroxyl-terminated liquid nitrile rubber, carrying out ultrasonic treatment, heating to 120 ℃, and reacting for 2-4.5 h; cooling to room temperature, filtering and drying to obtain the modified straw.
Fifth embodiment:
the filling material for mine filling exploitation is prepared from the following raw materials in parts by weight: 300 parts of tailing slag, 60 parts of cement, 15 parts of water reducer, 100 parts of desulfurized gypsum, 130 parts of fly ash, 160 parts of gangue, 80 parts of activated red mud and 60 parts of modified straw.
Wherein the water reducer is at least one of lignosulfonate water reducer, naphthalene water reducer, melamine water reducer, sulfamate water reducer, fatty acid water reducer and polycarboxylic acid water reducer.
The activated red mud is calcined red mud, and the activated red mud is prepared by calcining red mud at 850 ℃.
Wherein the particle size of the activated red mud is 300 meshes.
The preparation method of the filling material for mine filling exploitation comprises the following steps that S1, the tailing slag, the fly ash and the gangue are put into a pulverizer to be dry-ground until the powder A can be obtained through a 300-mesh sieve;
s2, placing the powder A into a wet mill, adding modified straw and a proper amount of water, starting wet milling, and filtering a grinding body after the wet milling is finished to obtain powder B;
and S3, uniformly stirring the powder B by using a stirrer to obtain the filling material.
The preparation method of the modified straw comprises the steps of washing and drying the straw, crushing the straw, soaking the straw in deionized water, sieving the dried straw with a 100-150-mesh sieve, steaming and boiling the straw with alkali liquor, and drying the straw to obtain straw powder; mixing the treated straw powder with hydroxyl-terminated liquid nitrile rubber, carrying out ultrasonic treatment, heating to 120 ℃, and reacting for 2-4.5 h; cooling to room temperature, filtering and drying to obtain the modified straw.
Example six:
the filling material for mine filling exploitation is prepared from the following raw materials in parts by weight: 300 parts of tailing slag, 60 parts of cement, 15 parts of water reducer, 100 parts of desulfurized gypsum, 130 parts of fly ash, 160 parts of gangue, 80 parts of activated red mud, 20 parts of polyacrylamide and 20 parts of sodium hexametaphosphate.
Wherein the water reducer is at least one of lignosulfonate water reducer, naphthalene water reducer, melamine water reducer, sulfamate water reducer, fatty acid water reducer and polycarboxylic acid water reducer.
The activated red mud is calcined red mud, and the activated red mud is prepared by calcining red mud at 850 ℃.
Wherein the particle size of the activated red mud is 300 meshes.
The preparation method of the filling material for mine filling exploitation comprises the following steps that S1, the tailing slag, the fly ash and the gangue are put into a pulverizer to be dry-ground until the powder A can be obtained through a 300-mesh sieve;
s2, placing the powder A into a wet grinding machine, adding polyacrylamide, sodium hexametaphosphate and a proper amount of water, starting wet grinding, and filtering a grinding body after the wet grinding is finished to obtain powder B;
and S3, uniformly stirring the powder B by using a stirrer to obtain the filling material.
The filling materials of the mine goaf prepared in each example are subjected to 3d and 7d compression tests according to the standard GB/T17671-1999 cement sand strength test method (ISO method), and specific test results are shown in the following table:
| 3d compressive Strength | 7d compressive Strength | |
| Example 1 | 3.56 | 4.45 |
| Example two | 3.15 | 4.77 |
| Example III | 3.97 | 4.43 |
| Example IV | 2.36 | 3.15 |
| Example five | 2.21 | 3.25 |
| Example six | 2.03 | 3.45 |
From the test results, the 3d compressive strength is greater than 2MPa, the 7d compressive strength is greater than 3MPa, the filling requirements of the mine goaf on the 3d strength being greater than 2MPa and the 7d strength being greater than 3MPa are completely met, and the polyacrylamide, the sodium hexametaphosphate and the modified straw directly have the same synergistic relationship, so that the compressive strength of the filling material is greatly provided.
The foregoing description of the preferred embodiments of the invention is not intended to be limiting, but rather is intended to cover all modifications, equivalents, and alternatives falling within the spirit and principles of the invention.
Claims (6)
1. A filling material for mine filling exploitation, characterized in that: the material is prepared from the following raw materials in parts by weight: 250-300 parts of tailing slag, 20-60 parts of cement, 4-15 parts of water reducer, 50-100 parts of desulfurized gypsum, 100-130 parts of fly ash, 80-160 parts of gangue, 30-80 parts of activated red mud, 10-20 parts of polyacrylamide, 15-20 parts of sodium hexametaphosphate and 30-60 parts of modified straw.
2. A filling material for mine filling exploitation according to claim 1, wherein: the water reducer is at least one of lignosulfonate water reducer, naphthalene water reducer, melamine water reducer, sulfamate water reducer, fatty acid water reducer and polycarboxylic acid water reducer.
3. A filling material for mine filling exploitation according to claim 1, wherein: the activated red mud is calcined red mud, and the activated red mud is prepared by calcining red mud at 750-850 ℃.
4. A filling material for mine filling exploitation according to claim 1, wherein: the particle size of the activated red mud is 200-300 meshes.
5. A preparation method of a filling material for mine filling exploitation is characterized by comprising the following steps: s1, placing the tailing slag, the fly ash and the gangue activated red mud into a pulverizer for dry grinding until the tailing slag, the fly ash and the gangue activated red mud can pass through a 300-mesh sieve to obtain powder A;
s2, placing the powder A into a wet grinding machine, adding polyacrylamide, sodium hexametaphosphate, modified straw and a proper amount of water, starting wet grinding, and filtering a grinding body after the wet grinding is finished to obtain powder B;
and S3, uniformly stirring the powder B by using a stirrer to obtain the filling material.
6. A method for producing a filling material for mine filling exploitation according to claim 5, wherein: the preparation method of the modified straw comprises the steps of washing and drying the straw, crushing the straw, soaking the straw in deionized water, sieving the dried straw with a 100-150-mesh sieve, steaming and boiling the straw with alkali liquor, and drying the straw to obtain straw powder; mixing the treated straw powder with hydroxyl-terminated liquid nitrile rubber, carrying out ultrasonic treatment, heating to 100-120 ℃, and reacting for 2-4.5 h;
cooling to room temperature, filtering and drying to obtain the modified straw.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107522455A (en) * | 2017-07-05 | 2017-12-29 | 固岩科技发展有限公司 | A kind of preparation method of the tailing-filled material in mine |
| CN109734377A (en) * | 2019-01-31 | 2019-05-10 | 商丘市睢阳区水务局 | A kind of energy saving and environment friendly construction material and preparation method thereof |
| CN112062544A (en) * | 2020-08-20 | 2020-12-11 | 广东同创科鑫环保有限公司 | Modified red mud-based building block and preparation method thereof |
| CN112341111A (en) * | 2020-09-23 | 2021-02-09 | 广东同创科鑫环保有限公司 | Red mud-based mine backfill material |
| CN113373734A (en) * | 2021-06-17 | 2021-09-10 | 浙江金龙再生资源科技股份有限公司 | Modified straw and application thereof in preparation of corrugated paper |
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Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107522455A (en) * | 2017-07-05 | 2017-12-29 | 固岩科技发展有限公司 | A kind of preparation method of the tailing-filled material in mine |
| CN109734377A (en) * | 2019-01-31 | 2019-05-10 | 商丘市睢阳区水务局 | A kind of energy saving and environment friendly construction material and preparation method thereof |
| CN112062544A (en) * | 2020-08-20 | 2020-12-11 | 广东同创科鑫环保有限公司 | Modified red mud-based building block and preparation method thereof |
| CN112341111A (en) * | 2020-09-23 | 2021-02-09 | 广东同创科鑫环保有限公司 | Red mud-based mine backfill material |
| CN113373734A (en) * | 2021-06-17 | 2021-09-10 | 浙江金龙再生资源科技股份有限公司 | Modified straw and application thereof in preparation of corrugated paper |
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