CN104098313A - Preparation method and backfill method of bleeding-free, quick-setting and quick-hardening underground carnallite backfill slurry - Google Patents
Preparation method and backfill method of bleeding-free, quick-setting and quick-hardening underground carnallite backfill slurry Download PDFInfo
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- CN104098313A CN104098313A CN201410332911.4A CN201410332911A CN104098313A CN 104098313 A CN104098313 A CN 104098313A CN 201410332911 A CN201410332911 A CN 201410332911A CN 104098313 A CN104098313 A CN 104098313A
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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
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/50—Reuse, recycling or recovery technologies
- Y02W30/91—Use of waste materials as fillers for mortars or concrete
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Abstract
The invention discloses a preparation method of bleeding-free, quick-setting and quick-hardening underground carnallite backfill slurry. The preparation method comprises the following steps: mother liquor after KCl production by the underground carnallite is evaporated forcefully, part of carnallite is recovered, and the specific gravity at the room temperature after the mother liquor is evaporated forcefully is not smaller than 1.350; a modifier and a gelling agent are added into the mother liquor after carnallite recovery to obtain the slurry; and tailings after KCl production by potassic salt ore is centrifugally dewatered and added into the slurry, and the mixture is stirred sufficiently to prepare a paste-type backfill slurry with the mass concentration of 70%-85%. The invention further discloses a backfill method of the backfill slurry. According to the preparation method of the backfill slurry, the design is reasonable, mill tailings and the mother liquor are used sufficiently, and bleeding-free, quick-setting and quick-hardening underground carnallite backfill can be achieved; and the technical problems of high bleeding rate, poor water resistance after curing and long setting time of the backfill slurry in the prior art are effectively solved.
Description
Technical field
The present invention relates to a kind of preparation and earth-filling method of the backfill slip of digging up mine, particularly a kind of high density, water resistant, solidifying and fast hard backfill carries out underground carnallite backfill soon materials and methods of using.
Background technology
Type carnallitite type sylvite ore is buried in inland, and traditional reoovery method has two kinds: dry mining and water law exploitation.No matter adopt which kind of reoovery method, a large amount of tail salt and the mother liquors of capital by-product when processing obtains KCl.In addition, for dry mining, except the disposal of tail salt and mother liquor, also there is the problem in underground big area worked-out section.
Such as mines such as coloured, collieries, conventionally use silicate cement as gelling material, take tailings or spoil to be delivered to worked-out section as aggregate is prepared into backfill slip.Solve on the one hand the handling problems of mine tailing, controllably pressed on the other hand, improved resource recovery rate.
For underground sylvite ore, existing multinomial patent documentation discloses preparation and the earth-filling method of backfill slip.If the patent No. is 201010164701.0,201010164704.4,201110034099.3,201310422599.3,201110458026.7 etc. Chinese patent literature.Above patent documentation all adopts the form of " mine tailing+mother liquor+magnesium oxide " to prepare backfill.Magnesium chloride in magnesium oxide and flotation mother liquor can generate the magnesia oxychloride cement of air-setting, after being mixed the backfill slip that makes by magnesia oxychloride cement with flotation salt and solidifying under drying conditions pressure-proof and snap-resistent better performances, but 30 ℃ of temperature, under more than 90% environment of relative humidity very easily the moisture absorption, drip, and the pressure-proof and snap-resistent intensity time loss of growth after solidifying is comparatively serious; On the other hand, existence due to a small amount of flotation reagent, can form a large amount of micro-bubbles when magnesium oxide and tail washings and tail salt are stirred jointly, has greatly increased the quantity of capillary channel in slip, finally cause slip bleeding rate in solidification process to increase, be easy to occur dehydration in stope phenomenon; Finally, in slip, NaCl content, in 70% left and right, causes slip coagulation reaction time longer, needs just to reach desirable strength in about 7 days, make to bore dig, air blast, mineral are carried and the backfill cycle lengthens.
Summary of the invention
Technical problem to be solved by this invention is defect large for backfill slip bleeding rate in prior art, that water resisting property is poor, setting time is long after solidifying, and a kind of preparation method without bleeding, fast solidifying, fast hard underground carnallite backfill slip is provided.
Another technical problem to be solved by this invention is to provide a kind of earth-filling method without bleeding, fast solidifying, fast hard underground carnallite backfill slip.
Technical problem to be solved by this invention is to realize by following technical scheme.The present invention is a kind of preparation method without bleeding, fast solidifying, fast hard underground carnallite backfill slip, is characterized in, its step is as follows:
(1) underground carnallite is produced to the mother liquor forced evaporation after KCl, recovery part carnallitite, after mother liquor forced evaporation, under room temperature, proportion is not less than 1.350;
(2) in the mother liquor reclaiming after carnallitite, add properties-correcting agent and jelling agent to obtain slip;
Described properties-correcting agent is accelerating chemicals and water repellent agent;
Described accelerating chemicals is selected from one or more mixtures that mix with arbitrary proportion in lithium salts, all alkali, trolamine, tri-isopropanolamine and urea; The mass percent of accelerating chemicals in backfill slip be not higher than 7%;
Described water repellent agent is selected from a kind of in phosphoric acid, orthophosphoric acid salt, vitriol, silicon ash or water-soluble organic resin or mixture that they mix with arbitrary proportion; The mass percent of water repellent agent in backfill slip be not higher than 8%;
Described jelling agent is that MgO activity value is not less than 50% activated magnesia; MgCl in activated magnesia and mother liquor
2mol ratio is 0.5:1～15:1;
(3) sylvite ore is produced to the mine tailing centrifuge dehydration after KCl, join in the slip that step (2) makes, fully stirring preparation, to become mass concentration be 70～85% paste body shape backfill slip.
Technical problem to be solved by this invention can also further realize by following technical scheme.The above-described preparation method without bleeding, fast solidifying, fast hard underground carnallite backfill slip, is characterized in, in step (2): described orthophosphoric acid salt is selected from tertiary iron phosphate or aluminum phosphate; Described vitriol is selected from gypsum, siderotil, alum or Tai-Ace S 150; Described water-soluble organic resin is selected from terpolycyantoamino-formaldehyde resin or urea element formaldehyde resin.
Technical problem to be solved by this invention can also further realize by following technical scheme.The above-described preparation method without bleeding, fast solidifying, fast hard underground carnallite backfill slip, is characterized in, in step (2): the mass percent of accelerating chemicals in backfill slip is 0.05～6%; The mass percent of water repellent agent in backfill slip is 0.05～6%.
Technical problem to be solved by this invention can also further realize by following technical scheme.The above-described preparation method without bleeding, fast solidifying, fast hard underground carnallite backfill slip, is characterized in, in step (2): the mass percent of accelerating chemicals in backfill slip is 0.2～3%; The mass percent of water repellent agent in backfill slip is 1～4%.
Technical problem to be solved by this invention can also further realize by following technical scheme.The above-described preparation method without bleeding, fast solidifying, fast hard underground carnallite backfill slip, is characterized in, in step (3): described mine tailing and the mass ratio of mother liquor are 1:1～10:1.
Technical problem to be solved by this invention can also further realize by following technical scheme.The above-described preparation method without bleeding, fast solidifying, fast hard underground carnallite backfill slip, is characterized in, in step (3): described mine tailing and the mass ratio of mother liquor are 2:1～8:1.
Technical problem to be solved by this invention can also further realize by following technical scheme.The above-described preparation method without bleeding, fast solidifying, fast hard underground carnallite backfill slip, is characterized in, in step (3): described mine tailing and the mass ratio of mother liquor are 4:1～6:1; The actual measurement slump of backfill slip is not less than 20cm.
Technical problem to be solved by this invention can also further realize by following technical scheme.The above-described preparation method without bleeding, fast solidifying, fast hard underground carnallite backfill slip, is characterized in, in step (3): described activated magnesia is the activated magnesia of magnesia or dolomite calcination gained, MgCl in activated magnesia and mother liquor
2mol ratio is 1:1～11:1.
Technical problem to be solved by this invention can also further realize by following technical scheme.The above-described preparation method without bleeding, fast solidifying, fast hard underground carnallite backfill slip, is characterized in, in step (3): MgCl in activated magnesia and mother liquor
2mol ratio is 1:1～5:1.
Technical problem to be solved by this invention can also further realize by following technical scheme.The invention also discloses a kind of earth-filling method without bleeding, fast solidifying, fast hard underground carnallite backfill slip, be characterized in, its step is as follows: by a pipeline, take the mode of gravity flow or pumping to be delivered to worked-out section the backfill slip that in above technical scheme, any one makes; The time that backfill is delivered to worked-out section after coagulation is 4h～72h, and the ultimate compression strength of solidifying the backfill of rear formation is 0.6～5Mpa.In earth-filling method of the present invention, the molding time of condensing can be adjusted in 4h～72h by changing the add-on of properties-correcting agent, and ultimate compression strength can be adjusted in 0.6～5Mpa by changing the add-on of gelling material.
Compared with prior art, the preparation method of backfill slurry of the present invention is reasonable in design, takes full advantage of milltailings and mother liquor, can realize without bleeding, fast solidifying, fast hard underground carnallite backfill.Effectively solved the technical problem that in prior art, large, the curing rear water resisting property of backfill slip bleeding rate is poor, setting time is long.
Accompanying drawing explanation
Fig. 1 is a kind of preparation method's process flow sheet of backfill slip of the present invention.
Embodiment
Below in conjunction with accompanying drawing, the present invention is described further describes.Embodiment is exemplary, only for explaining the present invention, and can not be interpreted as limitation of the present invention.
Embodiment 1, a kind of preparation method without bleeding, fast solidifying, fast hard underground carnallite backfill slip, and its step is as follows:
(1) underground carnallite is produced to the mother liquor forced evaporation after KCl, recovery part carnallitite, after mother liquor forced evaporation, under room temperature, proportion is not less than 1.350;
(2) in the mother liquor reclaiming after carnallitite, add properties-correcting agent and jelling agent to obtain slip;
Described properties-correcting agent is accelerating chemicals and water repellent agent;
Described accelerating chemicals is selected from one or more mixtures that mix with arbitrary proportion in lithium salts, all alkali, trolamine, tri-isopropanolamine and urea; The mass percent of accelerating chemicals in backfill slip is 7%;
Described water repellent agent is selected from a kind of in phosphoric acid, orthophosphoric acid salt, vitriol, silicon ash or water-soluble organic resin or mixture that they mix with arbitrary proportion; The mass percent of water repellent agent in backfill slip is 8%;
Described jelling agent is that MgO activity value is not less than 50% activated magnesia; MgCl in activated magnesia and mother liquor
2mol ratio is 0.5:1;
(3) sylvite ore is produced to the mine tailing centrifuge dehydration after KCl, join in the slip that step (2) makes, fully stirring preparation, to become mass concentration be 70% paste body shape backfill slip.
Embodiment 2, a kind of preparation method without bleeding, fast solidifying, fast hard underground carnallite backfill slip, and its step is as follows:
(1) underground carnallite is produced to the mother liquor forced evaporation after KCl, recovery part carnallitite, after mother liquor forced evaporation, under room temperature, proportion is not less than 1.350;
(2) in the mother liquor reclaiming after carnallitite, add properties-correcting agent and jelling agent to obtain slip;
Described properties-correcting agent is accelerating chemicals and water repellent agent;
Described accelerating chemicals is selected from one or more mixtures that mix with arbitrary proportion in lithium salts, all alkali, trolamine, tri-isopropanolamine and urea; The mass percent of accelerating chemicals in backfill slip is 6%;
Described water repellent agent is selected from a kind of in phosphoric acid, orthophosphoric acid salt, vitriol, silicon ash or water-soluble organic resin or mixture that they mix with arbitrary proportion; The mass percent of water repellent agent in backfill slip is 7%;
Described jelling agent is that MgO activity value is not less than 50% activated magnesia; MgCl in activated magnesia and mother liquor
2mol ratio is 15:1;
(3) sylvite ore is produced to the mine tailing centrifuge dehydration after KCl, join in the slip that step (2) makes, fully stirring preparation, to become mass concentration be 85% paste body shape backfill slip.
Embodiment 3, and embodiment 1 or 2 requires in the described preparation method's without bleeding, fast solidifying, fast hard underground carnallite backfill slip step (2): described orthophosphoric acid salt is selected from tertiary iron phosphate or aluminum phosphate; Described vitriol is selected from gypsum, siderotil, alum or Tai-Ace S 150; Described water-soluble organic resin is selected from terpolycyantoamino-formaldehyde resin or urea element formaldehyde resin.
Embodiment 4, and embodiment 1 or 2 or 3 requires the described preparation method without bleeding, fast solidifying, fast hard underground carnallite backfill slip: the mass percent of accelerating chemicals in backfill slip is 0.05%; The mass percent of water repellent agent in backfill slip is 0.05%; All the other are all identical with embodiment 1 or 2 or 3.
Embodiment 5, and embodiment 1 or 2 or 3 requires the described preparation method without bleeding, fast solidifying, fast hard underground carnallite backfill slip: the mass percent of accelerating chemicals in backfill slip is 0.2%; The mass percent of water repellent agent in backfill slip is 1%; All the other are all identical with embodiment 1 or 2 or 3.
Embodiment 6, and embodiment 1 or 2 or 3 requires the described preparation method without bleeding, fast solidifying, fast hard underground carnallite backfill slip: the mass percent of accelerating chemicals in backfill slip is 3%; The mass percent of water repellent agent in backfill slip is 4%; The actual measurement slump of backfill slip is not less than 20cm.All the other are all identical with embodiment 1 or 2 or 3.
Embodiment 7, and any one requires embodiment 1-6 in the described preparation method's without bleeding, fast solidifying, fast hard underground carnallite backfill slip step (3): described mine tailing and the mass ratio of mother liquor are 1:1.
Embodiment 8, and any one requires embodiment 1-6 in the described preparation method's without bleeding, fast solidifying, fast hard underground carnallite backfill slip step (3): described mine tailing and the mass ratio of mother liquor are 10:1.
Embodiment 9, and any one requires embodiment 1-6 in the described preparation method's without bleeding, fast solidifying, fast hard underground carnallite backfill slip step (3): described mine tailing and the mass ratio of mother liquor are 5:1.
Embodiment 10, any one requires embodiment 1-9 in the described preparation method's without bleeding, fast solidifying, fast hard underground carnallite backfill slip step (3): described activated magnesia is the activated magnesia of magnesia or dolomite calcination gained, MgCl in activated magnesia and mother liquor
2mol ratio is 1:1.
Embodiment 11, any one requires embodiment 1-9 in the described preparation method's without bleeding, fast solidifying, fast hard underground carnallite backfill slip step (3): described activated magnesia is the activated magnesia of magnesia or dolomite calcination gained, MgCl in activated magnesia and mother liquor
2mol ratio is 11:1.
Embodiment 12, any one requires embodiment 1-9 in the described preparation method's without bleeding, fast solidifying, fast hard underground carnallite backfill slip step (3): described activated magnesia is the activated magnesia of magnesia or dolomite calcination gained, MgCl in activated magnesia and mother liquor
2mol ratio is 5:1.
Embodiment 13, a kind of earth-filling method without bleeding, fast solidifying, fast hard underground carnallite backfill slip, and its step is as follows: by embodiment 1-12, any one backfill slip making takes the mode of gravity flow or pumping to be delivered to worked-out section by a pipeline; The time that backfill is delivered to worked-out section after coagulation is 4h～72h, and the ultimate compression strength of solidifying the backfill of rear formation is 0.6～5Mpa.
In following experiment, MouKCl manufacturing enterprise, after choosing, after liquid, choosing, liquid forced evaporation reclaims after carnallitite that mother liquor forms and mine tailing forms in Table 1:
Table 1
Embodiment 14, and a kind of preparation method without bleeding, fast solidifying, fast hard underground carnallite backfill slip tests one:
Press MgCl in activated magnesia and mother liquor
2mol ratio 1:1, tail salt and mother liquor mass ratio 4:1, get table 1 mother liquor 590Kg, adds trolamine 20Kg, phosphoric acid 50Kg, gypsum 50Kg, adds light calcined magnesia (activity value 53%) 180Kg after stirring, stir 5 minutes, then add tail salt 2360Kg, stir 20 minutes.Measure its slump value and bleeding rate, slip is made to 707 standard die trials, at 30 ℃, maintenance under relative humidity 90% condition, measures difference compression strength value in the length of time, in Table 2.
Table 2
Embodiment 15, and a kind of preparation method without bleeding, fast solidifying, fast hard underground carnallite backfill slip tests two:
Press MgCl in activated magnesia and mother liquor
2mol ratio 3:1, tail salt and mother liquor mass ratio 4:1, get table 1 mother liquor 590Kg, adds lithium chloride 20Kg, phosphoric acid 50Kg, gypsum 50Kg, adds light calcined magnesia (activity value 53%) 540Kg after stirring, stir 5 minutes, then add tail salt 2360Kg, stir 20 minutes.Measure its slump value and bleeding rate, slip is made to 707 standard die trials, at 30 ℃, maintenance under relative humidity 90% condition, measures difference compression strength value in the length of time, in Table 3.
Table 3
Embodiment 16, and a kind of preparation method without bleeding, fast solidifying, fast hard underground carnallite backfill slip tests three:
Press MgCl in activated magnesia and mother liquor
2mol ratio 2:1, tail salt and mother liquor mass ratio 4:1, get table 1 mother liquor 590Kg, phosphoric acid 50Kg, gypsum 50Kg, adds light calcined magnesia (activity value 53%) 540Kg after stirring, stir 5 minutes, then add tail salt 2360Kg, stirs 20 minutes.Measure its slump value and bleeding rate, slip is made to 707 standard die trials, at 30 ℃, maintenance under relative humidity 90% condition, measures difference compression strength value in the length of time, in Table 4.
Table 4
Although above the present invention is described in detail with a general description of the specific embodiments, on basis of the present invention, can make some modifications and improvement, this will be apparent to those skilled in the art.Therefore, these that made are without departing from theon the basis of the spirit of the present invention revised and are improved, and all belong to the scope of protection of present invention.
Claims (10)
1. without a preparation method for bleeding, fast solidifying, fast hard underground carnallite backfill slip, it is characterized in that, its step is as follows:
(1) underground carnallite is produced to the mother liquor forced evaporation after KCl, recovery part carnallitite, after mother liquor forced evaporation, under room temperature, proportion is not less than 1.350;
(2) in the mother liquor reclaiming after carnallitite, add properties-correcting agent and jelling agent to obtain slip;
Described properties-correcting agent is accelerating chemicals and water repellent agent;
Described accelerating chemicals is selected from one or more mixtures that mix with arbitrary proportion in lithium salts, all alkali, trolamine, tri-isopropanolamine and urea; The mass percent of accelerating chemicals in backfill slip be not higher than 7%;
Described water repellent agent is selected from a kind of in phosphoric acid, orthophosphoric acid salt, vitriol, silicon ash or water-soluble organic resin or mixture that they mix with arbitrary proportion; The mass percent of water repellent agent in backfill slip be not higher than 8%;
Described jelling agent is that MgO activity value is not less than 50% activated magnesia; MgCl in activated magnesia and mother liquor
2mol ratio is 0.5:1～15:1;
(3) sylvite ore is produced to the mine tailing centrifuge dehydration after KCl, join in the slip that step (2) makes, fully stirring preparation, to become mass concentration be 70～85% paste body shape backfill slip.
2. the preparation method without bleeding, fast solidifying, fast hard underground carnallite backfill slip according to claim 1, is characterized in that, in step (2): described orthophosphoric acid salt is selected from tertiary iron phosphate or aluminum phosphate; Described vitriol is selected from gypsum, siderotil, alum or Tai-Ace S 150; Described water-soluble organic resin is selected from terpolycyantoamino-formaldehyde resin or urea element formaldehyde resin.
3. the preparation method without bleeding, fast solidifying, fast hard underground carnallite backfill slip according to claim 1, is characterized in that, in step (2): the mass percent of accelerating chemicals in backfill slip is 0.05～6%; The mass percent of water repellent agent in backfill slip is 0.05～6%.
4. the preparation method without bleeding, fast solidifying, fast hard underground carnallite backfill slip according to claim 1, is characterized in that, in step (2): the mass percent of accelerating chemicals in backfill slip is 0.2～3%; The mass percent of water repellent agent in backfill slip is 1～4%.
5. the preparation method without bleeding, fast solidifying, fast hard underground carnallite backfill slip according to claim 1, is characterized in that, in step (3): described mine tailing and the mass ratio of mother liquor are 1:1～10:1.
6. the preparation method without bleeding, fast solidifying, fast hard underground carnallite backfill slip according to claim 5, is characterized in that, in step (3): described mine tailing and the mass ratio of mother liquor are 2:1～8:1.
7. the preparation method without bleeding, fast solidifying, fast hard underground carnallite backfill slip according to claim 6, is characterized in that, in step (3): described mine tailing and the mass ratio of mother liquor are 4:1～6:1; The actual measurement slump of backfill slip is not less than 20cm.
8. the preparation method without bleeding, fast solidifying, fast hard underground carnallite backfill slip according to claim 1, it is characterized in that, in step (3): described activated magnesia is the activated magnesia of magnesia or dolomite calcination gained, MgCl in activated magnesia and mother liquor
2mol ratio is 1:1～11:1.
9. according to the preparation method without bleeding, fast solidifying, fast hard underground carnallite backfill slip described in claim 1 or 8, it is characterized in that, in step (3): MgCl in activated magnesia and mother liquor
2mol ratio is 1:1～5:1.
10. the earth-filling method without bleeding, fast solidifying, fast hard underground carnallite backfill slip, it is characterized in that, its step is as follows: by claim 1-9, any one backfill slip making takes the mode of gravity flow or pumping to be delivered to worked-out section by a pipeline; The time that backfill is delivered to worked-out section after coagulation is 4h～72h, and the ultimate compression strength of solidifying the backfill of rear formation is 0.6～5Mpa.
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| CN104446323A (en) * | 2014-12-11 | 2015-03-25 | 云南省化工研究院 | Method for spraying protective agent on surface of mining tunnel of soluble solid leopoldite for fast setting |
| CN104446280A (en) * | 2014-11-06 | 2015-03-25 | 云南省化工研究院 | Method of retarding backfilled mineral slurry in goaf of underground soluble potash mine |
| CN104712359B (en) * | 2015-02-12 | 2016-10-12 | 化工部长沙设计研究院 | A kind of method preparing goaf backfill material with the sylvite ore potassium mine tailing containing magnesium |
| CN111848099A (en) * | 2020-06-15 | 2020-10-30 | 广东韶钢嘉羊新型材料有限公司 | Tailing excited gel filling material and preparation method thereof |
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| CN104446280A (en) * | 2014-11-06 | 2015-03-25 | 云南省化工研究院 | Method of retarding backfilled mineral slurry in goaf of underground soluble potash mine |
| CN104446323A (en) * | 2014-12-11 | 2015-03-25 | 云南省化工研究院 | Method for spraying protective agent on surface of mining tunnel of soluble solid leopoldite for fast setting |
| CN104712359B (en) * | 2015-02-12 | 2016-10-12 | 化工部长沙设计研究院 | A kind of method preparing goaf backfill material with the sylvite ore potassium mine tailing containing magnesium |
| CN111848099A (en) * | 2020-06-15 | 2020-10-30 | 广东韶钢嘉羊新型材料有限公司 | Tailing excited gel filling material and preparation method thereof |
| CN111848099B (en) * | 2020-06-15 | 2022-08-19 | 广东韶钢嘉羊新型材料有限公司 | Tailing excited gel filling material and preparation method thereof |
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