CN108867712B - Side slope, pit bottom and substrate seepage prevention method based on tailing composite seepage prevention material - Google Patents
Side slope, pit bottom and substrate seepage prevention method based on tailing composite seepage prevention material Download PDFInfo
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- 239000000463 material Substances 0.000 title claims abstract description 46
- 239000002131 composite material Substances 0.000 title claims abstract description 33
- 238000000034 method Methods 0.000 title claims abstract description 29
- 239000000758 substrate Substances 0.000 title claims abstract description 15
- 230000002265 prevention Effects 0.000 title description 6
- 238000005507 spraying Methods 0.000 claims abstract description 49
- 239000000203 mixture Substances 0.000 claims abstract description 35
- 239000003381 stabilizer Substances 0.000 claims abstract description 19
- 239000002002 slurry Substances 0.000 claims abstract description 16
- 239000003906 humectant Substances 0.000 claims abstract description 15
- 239000004568 cement Substances 0.000 claims abstract description 10
- 238000002156 mixing Methods 0.000 claims abstract description 10
- 235000019353 potassium silicate Nutrition 0.000 claims abstract description 10
- NTHWMYGWWRZVTN-UHFFFAOYSA-N sodium silicate Chemical compound [Na+].[Na+].[O-][Si]([O-])=O NTHWMYGWWRZVTN-UHFFFAOYSA-N 0.000 claims abstract description 10
- UXVMQQNJUSDDNG-UHFFFAOYSA-L Calcium chloride Chemical compound [Cl-].[Cl-].[Ca+2] UXVMQQNJUSDDNG-UHFFFAOYSA-L 0.000 claims abstract description 9
- KFVREYFOFOLMIE-UHFFFAOYSA-N O.O.O.O.[Na+].[Na+].[Na+].[O-]B([O-])[O-] Chemical compound O.O.O.O.[Na+].[Na+].[Na+].[O-]B([O-])[O-] KFVREYFOFOLMIE-UHFFFAOYSA-N 0.000 claims abstract description 9
- 239000001110 calcium chloride Substances 0.000 claims abstract description 9
- 229910001628 calcium chloride Inorganic materials 0.000 claims abstract description 9
- 238000010276 construction Methods 0.000 claims abstract description 7
- 230000008569 process Effects 0.000 claims abstract description 7
- LEQAOMBKQFMDFZ-UHFFFAOYSA-N glyoxal Chemical group O=CC=O LEQAOMBKQFMDFZ-UHFFFAOYSA-N 0.000 claims description 10
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 8
- 238000005065 mining Methods 0.000 claims description 8
- 238000003756 stirring Methods 0.000 claims description 8
- OYPRJOBELJOOCE-IGMARMGPSA-N Calcium-40 Chemical compound [40Ca] OYPRJOBELJOOCE-IGMARMGPSA-N 0.000 claims description 5
- 241000196324 Embryophyta Species 0.000 claims description 5
- 229940015043 glyoxal Drugs 0.000 claims description 5
- 239000004576 sand Substances 0.000 claims description 5
- 239000002689 soil Substances 0.000 claims description 5
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 claims description 4
- 229910052782 aluminium Inorganic materials 0.000 claims description 4
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 4
- 238000004140 cleaning Methods 0.000 claims description 4
- 238000007667 floating Methods 0.000 claims description 4
- 238000007689 inspection Methods 0.000 claims description 4
- 229910052742 iron Inorganic materials 0.000 claims description 4
- 239000011435 rock Substances 0.000 claims description 4
- 229910052710 silicon Inorganic materials 0.000 claims description 4
- 239000010703 silicon Substances 0.000 claims description 4
- 229910001385 heavy metal Inorganic materials 0.000 claims description 3
- 150000002500 ions Chemical class 0.000 claims description 3
- 230000005012 migration Effects 0.000 claims description 2
- 238000013508 migration Methods 0.000 claims description 2
- 239000004927 clay Substances 0.000 abstract description 8
- 230000035699 permeability Effects 0.000 abstract description 8
- 239000002253 acid Substances 0.000 abstract description 4
- 239000003513 alkali Substances 0.000 abstract description 4
- 238000007596 consolidation process Methods 0.000 abstract description 2
- 239000002585 base Substances 0.000 description 8
- 239000002910 solid waste Substances 0.000 description 7
- 238000003860 storage Methods 0.000 description 4
- 239000002699 waste material Substances 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- 239000000440 bentonite Substances 0.000 description 2
- 229910000278 bentonite Inorganic materials 0.000 description 2
- SVPXDRXYRYOSEX-UHFFFAOYSA-N bentoquatam Chemical compound O.O=[Si]=O.O=[Al]O[Al]=O SVPXDRXYRYOSEX-UHFFFAOYSA-N 0.000 description 2
- 239000004746 geotextile Substances 0.000 description 2
- 229920001903 high density polyethylene Polymers 0.000 description 2
- 239000004700 high-density polyethylene Substances 0.000 description 2
- 229920000642 polymer Polymers 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- OYPRJOBELJOOCE-BKFZFHPZSA-N Calcium-45 Chemical compound [45Ca] OYPRJOBELJOOCE-BKFZFHPZSA-N 0.000 description 1
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 description 1
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- PWHULOQIROXLJO-UHFFFAOYSA-N Manganese Chemical compound [Mn] PWHULOQIROXLJO-UHFFFAOYSA-N 0.000 description 1
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 229910052787 antimony Inorganic materials 0.000 description 1
- WATWJIUSRGPENY-UHFFFAOYSA-N antimony atom Chemical compound [Sb] WATWJIUSRGPENY-UHFFFAOYSA-N 0.000 description 1
- 230000004888 barrier function Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 229910052804 chromium Inorganic materials 0.000 description 1
- 239000011651 chromium Substances 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 239000010791 domestic waste Substances 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 229920006262 high density polyethylene film Polymers 0.000 description 1
- 229910052500 inorganic mineral Inorganic materials 0.000 description 1
- 235000015110 jellies Nutrition 0.000 description 1
- 239000008274 jelly Substances 0.000 description 1
- 239000011133 lead Substances 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 229910052748 manganese Inorganic materials 0.000 description 1
- 239000011572 manganese Substances 0.000 description 1
- 239000011707 mineral Substances 0.000 description 1
- 239000012466 permeate Substances 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- 238000009991 scouring Methods 0.000 description 1
- 230000000087 stabilizing effect Effects 0.000 description 1
- 238000003911 water pollution Methods 0.000 description 1
- 239000011701 zinc Substances 0.000 description 1
- 229910052725 zinc Inorganic materials 0.000 description 1
Images
Classifications
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D31/00—Protective arrangements for foundations or foundation structures; Ground foundation measures for protecting the soil or the subsoil water, e.g. preventing or counteracting oil pollution
- E02D31/02—Protective arrangements for foundations or foundation structures; Ground foundation measures for protecting the soil or the subsoil water, e.g. preventing or counteracting oil pollution against ground humidity or ground water
- E02D31/04—Watertight packings for use under hydraulic pressure
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B28/00—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
- C04B28/24—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements containing alkyl, ammonium or metal silicates; containing silica sols
- C04B28/26—Silicates of the alkali metals
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D2300/00—Materials
- E02D2300/0045—Composites
Abstract
The invention discloses a side slope, pit bottom and substrate anti-seepage method based on a tailing composite anti-seepage material, which comprises the following components in percentage by mass: 3.3 to 4.8 percent of stabilizer, 3.3 to 4.8 percent of humectant, 10.0 to 15.2 percent of water glass, 10.0 to 15.2 percent of cement and 60.0 to 73.0 percent of tailing slurry; the stabilizer is a mixture of calcium chloride and sodium borate tetrahydrate. The construction process comprises the following steps: preparing and mixing the anti-seepage material, treating the sprayed surface, conveying the anti-seepage mixture, spraying the anti-seepage mixture and checking the spraying quality. The final tailing composite impervious material layer formed by the method has extremely low permeability which is only 1/1000 of high-quality clay, and the permeability coefficient can reach k 1 multiplied by 10‑9And the material is good in acid resistance and alkali resistance, strong in stability, high in consolidation strength and scour-proof.
Description
Technical Field
The invention relates to an anti-seepage method for a side slope, a pit bottom and a base, in particular to an anti-seepage treatment method for the side slope, the pit bottom and the base of a solid waste disposal site such as a mine waste open-pit mining pit, a valley-shaped or mountain-side-shaped tailing pond, a refuse landfill and the like.
Background
After several decades of mining, a large number of open pit and underground dead areas are left in mines in China. Open pit and underground dead zone are often accompanied by generation. Along with the scarcity of land resources, the storage and disposal sites of various wastes are reduced, and the open pit is more and more utilized, so that the damage of seepage generated by stacking the wastes in the open pit to an underground goaf is brought.
The disposal of domestic tailings mainly comprises two types of tailings stacking and filling of a goaf, wherein the tailings stacking is a mode for disposing the largest amount of tailings, and as water and a small amount of harmful elements exist in the tailings, for valley type and mountain side type tailings ponds, tailing water permeates into underground water through the ground and surrounding hillsides, so that underground water pollution is caused.
In addition, with the development of economy in China, industrialization and urbanization are accelerated continuously, various solid wastes are stored and treated more and more, and most of soil in China is threatened by more and more pollution. According to incomplete statistics, about 1.5 hundred million acres of polluted cultivated land in the whole country, about 500 ten thousand acres of solid waste stockpiled land and damaged land, 1/10 which accounts for about the area of the cultivated land, a pollution control standard of a general industrial solid waste storage and disposal site (GB18599-2001) is issued by the national environmental protection administration of 12 and 28 th 2001, and a technical specification of an anti-seepage system engineering of a domestic waste sanitary landfill (CJJ113-2007) is issued by the Ministry of public republic of China in 1 and 17 th 2007.
The present invention relates to a method for making side slope anti-seepage layer, including building anti-seepage layer, ① clay anti-seepage layer, which is characterized by that it has good natural clay quality of clay, and can meet the requirements for anti-seepage, and has high requirements for permeability coefficient, liquid limit, plasticity and pH value of clay, and its effect is poor, ② bentonite anti-seepage layer, said anti-seepage layer is made up by adding a certain proportion of bentonite into clay in the terrain with poor geological condition to adapt to the terrain with poor geological condition, and not only has a certain requirement for clay, but also its application range is small, ③ high-density polyethylene (HDPE) anti-seepage layer, and it is mainly made up by using "two-cloth-one-film" form, i.e. geotextile + HDPE film + geotextile laying pad anti-seepage layer, otherwise it has poor anti-seepage effect, and its cost is high.
Disclosure of Invention
Aiming at the problems in the prior art, the invention provides the seepage-proofing method for the side slope, the pit bottom and the base based on the tailing composite seepage-proofing material, which has the advantages of extremely low permeability, good acid and alkali resistance and convenient construction and laying, thereby effectively solving the seepage-proofing problem of the side slope, the pit bottom and the base of various solid waste storage and disposal sites.
In order to realize the aim, the invention discloses a side slope, pit bottom and base anti-seepage method based on a tailing composite anti-seepage material, which is realized by adopting the following technical scheme:
the invention relates to a side slope, pit bottom and substrate anti-seepage method based on a tailing composite anti-seepage material, which adopts the tailing composite anti-seepage material and comprises the following components in percentage by mass: 3.3 to 4.8 percent of stabilizer, 3.3 to 4.8 percent of humectant, 10.0 to 15.2 percent of water glass, 10.0 to 15.2 percent of cement and 60.0 to 73.0 percent of tailing slurry; the stabilizer is a mixture of calcium chloride and sodium borate tetrahydrate; the anti-seepage construction is carried out on the side slope, the pit bottom and the base by adopting the following process:
1) preparing and mixing the tailing composite impermeable material: uniformly mixing and stirring the stabilizer, the humectant, the water glass, the cement and the tailing slurry according to the proportion to prepare an anti-seepage mixture;
2) treating the sprayed surface: cleaning a side slope, an open stope pit bottom, an underground mining collapse pit bottom or a tailing pond substrate, and removing large rocks, floating soil, leaves and weeds;
3) conveying the anti-seepage mixture: the anti-seepage mixture is conveyed from a stirring place to a spraying place in the shortest time with the least number of times of transferring load, so that the uniformity of the anti-seepage mixture is kept, and the anti-seepage mixture is not separated or layered;
4) and (3) spraying of the anti-seepage mixture: spraying the anti-seepage mixture conveyed to a spraying place by a wet spraying machine in a sectional, subsection and block manner, wherein the thickness of primary spraying is 8-10 cm, and the lap joint length between lines is 5-8 cm; the secondary spraying is also carried out in a segmented manner, wherein the concave surface is sprayed firstly, and then the convex surface is sprayed, and the length of each segment is 4.5-7.0 m; the thickness of the finally formed tailing composite impermeable material layer is 11-13 cm;
5) inspection of ejection quality: and after the spraying is finished, checking the sprayed impermeable material layer, and performing additional spraying on the positions with less spraying and missing spraying until the impermeable material layer is qualified.
The adopted tailing composite impermeable material preferably comprises the following components in percentage by mass: 3.5 to 4.6 percent of stabilizer, 3.5 to 4.6 percent of humectant, 11.0 to 14.5 percent of water glass, 11.0 to 14.5 percent of cement and 63.0 to 71.0 percent of tailing slurry; the humectant is glyoxal.
The stabilizer comprises the following components in percentage by mass: 50-60% of calcium chloride and 40-50% of sodium borate tetrahydrate, and the composite preparation is prepared from a dry material.
The stabilizer comprises 54-60% of calcium chloride and 40-46% of sodium borate tetrahydrate by mass percent; the tailing slurry comprises the following components in percentage by mass: 60 to 70 percent of the tailing in the tailing slurry is fine grain tailing sand containing iron, aluminum and silicon, the effective grain diameter of which is less than 0.076 mm.
The invention relates to a side slope, pit bottom and substrate anti-seepage method based on a tailing composite anti-seepage material, which fully utilizes the chemical characteristics of fine mineral substances in tailings, and forms a waterproof polymer jelly through physical and chemical reactions under the action of an additional compound, wherein the polymer does not react with acid, alkali and other salts, and has good workability. The material can be sprayed and cemented on the side slopes, pit bottoms and substrates of various solid waste storage and disposal sites for seepage prevention, is particularly suitable for the side slope seepage prevention of solid waste disposal sites such as open mining pits of mine waste, valley-shaped and mountain-side-shaped tailing reservoirs, refuse landfill sites and the like, and solves the problem troubled by the technical field.
Compared with the seepage-proofing method adopted in the prior art, the seepage-proofing method for the side slope, the pit bottom and the substrate based on the tailing composite seepage-proofing material has the following advantages:
(1) the finally formed tailing composite impervious material layer has extremely low permeability which is only 1/1000 of high-quality clay, and the permeability coefficient can reach k 1 x 10-9；
(2) The acid resistance and the alkali resistance are good, and the stability is strong;
(3) the method is not only suitable for the anti-seepage treatment of various slopes, especially high and steep slopes, but also suitable for the anti-seepage treatment of the pit bottom of an open stope, the pit bottom of an underground mining collapse pit, the foundation of a tailing pond and the foundation of a refuse dump;
(4) the construction and the laying are convenient, the spraying efficiency is high, and rolling is not needed;
(5) the consolidation strength is high, and the scouring is prevented;
(6) prevent plant puncture and has no influence on permeability.
Drawings
FIG. 1 is a process flow chart of the implementation of the seepage-proofing method for the side slope, the pit bottom and the base based on the tailing composite seepage-proofing material.
The reference signs are: 1-high steep slope of open stope; 2-a layer of barrier material; 3-side slope spraying surface; 4-wet spraying machinery; 5-anti-seepage mixing material; 6, an air compressor; 7-a conveying pipeline; 8-feeding platform.
Detailed Description
In order to better describe the invention, the method for preventing seepage of the side slope, the pit bottom and the base based on the tailing composite anti-seepage material is further described in detail with reference to the attached drawings.
The invention relates to a side slope, pit bottom and substrate anti-seepage method based on a tailing composite anti-seepage material, which adopts the tailing composite anti-seepage material and comprises the following components in percentage by mass: 3.3 to 4.8 percent of stabilizer, 3.3 to 4.8 percent of humectant, 10.0 to 15.2 percent of water glass, 10.0 to 15.2 percent of cement and 60.0 to 73.0 percent of tailing slurry; the stabilizer is a mixture of calcium chloride and sodium borate tetrahydrate, the mixture ratio is 50-60% of calcium chloride and 40-50% of sodium borate tetrahydrate, and the composite accessory is prepared by adopting a dry material; the humectant is glyoxal.
As shown in fig. 1, the implementation process flow chart of the side slope, pit bottom and substrate anti-seepage method based on the tailing composite anti-seepage material of the invention shows that the method of the invention adopts the following processes to perform anti-seepage construction on the side slope, pit bottom and substrate:
1) preparing and mixing the tailing composite impermeable material: uniformly mixing and stirring the stabilizer, the humectant, the water glass, the cement and the tailing slurry according to the proportion to prepare an anti-seepage mixture;
2) treating the sprayed surface: cleaning a side slope, an open stope pit bottom, an underground mining collapse pit bottom or a tailing pond substrate, and removing large rocks, floating soil, leaves and weeds;
3) conveying the anti-seepage mixture: the anti-seepage mixture is conveyed from a stirring place to a spraying place in the shortest time with the least number of times of transferring load, so that the uniformity of the anti-seepage mixture is kept, and the anti-seepage mixture is not separated or layered;
4) and (3) spraying of the anti-seepage mixture: spraying the anti-seepage mixture conveyed to a spraying place by a wet spraying machine in a sectional, subsection and block manner, wherein the thickness of primary spraying is 8-10 cm, and the lap joint length between lines is 5-8 cm; the secondary spraying is also carried out in a segmented manner, wherein the concave surface is sprayed firstly, and then the convex surface is sprayed, and the length of each segment is 4.5-7.0 m; the thickness of the finally formed tailing composite impermeable material layer is 11-13 cm;
5) inspection of ejection quality: and after the spraying is finished, checking the sprayed impermeable material layer, and performing additional spraying on the positions with less spraying and missing spraying until the impermeable material layer is qualified.
The components and the proportion of the tailing composite impermeable material adopted by the method are shown in the table 1. In the examples, the humectant employed glyoxal; the stabilizer comprises 55% by mass of calcium chloride and 45% by mass of sodium borate tetrahydrate, and is prepared from a dry material; the mass percentage of the tailing slurry is 68 percent, and the tailing in the tailing slurry is fine-grain tailing sand containing iron, aluminum and silicon, and the effective grain diameter of the tailing sand is less than 0.076 mm.
Table 1 composition and ratio (%)
Experimental studies show that the permeability coefficients of examples 1 to 8 can reach k ═ 1 × 10-9. Among them, examples 5, 7 and 8 can also be used as a curing agent and a stabilizing agent for heavy metal ions, and have a curing rate and a stabilizing rate of copper, lead, zinc, chromium, antimony and manganese of more than 99.0%, and can effectively prevent the migration of heavy metal ions, thereby achieving unexpected technical effects.
Claims (2)
1. A side slope, pit bottom and base seepage control method based on a tailing composite seepage control material is characterized by comprising the following steps: the adopted tailing composite impermeable material comprises the following components in percentage by mass: 3.5-4.6% of a stabilizer, 3.5-4.6% of a humectant, 11.0-14.5% of water glass, 11.0-14.5% of cement, 63.0-70.0% of tailing slurry, wherein tailings in the tailing slurry are fine-grain tailing sand containing iron, aluminum and silicon and having an effective grain diameter of less than 0.076 mm; the stabilizer is prepared from 54-60% of calcium chloride and 40-46% of sodium borate tetrahydrate by mass percent; the humectant is glyoxal; the anti-seepage construction is carried out on the side slope, the pit bottom and the base by adopting the following process:
1) preparing and mixing the tailing composite impermeable material: uniformly mixing and stirring the stabilizer, the humectant, the water glass, the cement and the tailing slurry according to the proportion to prepare an anti-seepage mixture;
2) treating the sprayed surface: cleaning a side slope, an open stope pit bottom, an underground mining collapse pit bottom or a tailing pond substrate, and removing large rocks, floating soil, leaves and weeds;
3) conveying the anti-seepage mixture: the anti-seepage mixture is conveyed from a stirring place to a spraying place in the shortest time with the least number of times of transferring load, so that the uniformity of the anti-seepage mixture is kept, and the anti-seepage mixture is not separated or layered;
4) and (3) spraying of the anti-seepage mixture: spraying the anti-seepage mixture conveyed to a spraying place by a wet spraying machine in a sectional, subsection and block manner, wherein the thickness of primary spraying is 8-10 cm, and the lap joint length between lines is 5-8 cm; the secondary spraying is also carried out in a segmented manner, wherein the concave surface is sprayed firstly, and then the convex surface is sprayed, and the length of each segment is 4.5-7.0 m; the thickness of the finally formed tailing composite impermeable material layer is 11-13 cm;
5) inspection of ejection quality: and after the spraying is finished, checking the sprayed impermeable material layer, and performing additional spraying on the positions with less spraying and missing spraying until the impermeable material layer is qualified.
2. A side slope, pit bottom and substrate anti-seepage method based on a tailing composite anti-seepage material is characterized in that the adopted tailing composite anti-seepage material comprises the following components in percentage by mass: 3.9-4.8% of a stabilizer, 4.1-4.8% of a humectant, 12.5-15.2% of water glass, 12.5-15.2% of cement, 63.0-66.0% of tailing slurry, wherein tailings in the tailing slurry are fine-grain tailing sand containing iron, aluminum and silicon and having an effective grain diameter of less than 0.076 mm; the humectant is glyoxal; the stabilizer is prepared from 54-60% of calcium chloride and 40-46% of sodium borate tetrahydrate by mass percent; the anti-seepage construction is carried out on the side slope, the pit bottom and the base by adopting the following process:
1) preparing and mixing the tailing composite impermeable material: uniformly mixing and stirring the stabilizer, the humectant, the water glass, the cement and the tailing slurry according to the proportion to prepare an anti-seepage mixture;
2) treating the sprayed surface: cleaning a side slope, an open stope pit bottom, an underground mining collapse pit bottom or a tailing pond substrate, and removing large rocks, floating soil, leaves and weeds;
3) conveying the anti-seepage mixture: the anti-seepage mixture is conveyed from a stirring place to a spraying place in the shortest time with the least number of times of transferring load, so that the uniformity of the anti-seepage mixture is kept, and the anti-seepage mixture is not separated or layered;
4) and (3) spraying of the anti-seepage mixture: spraying the anti-seepage mixture conveyed to a spraying place by a wet spraying machine in a sectional, subsection and block manner, wherein the thickness of primary spraying is 8-10 cm, and the lap joint length between lines is 5-8 cm; the secondary spraying is also carried out in a segmented manner, wherein the concave surface is sprayed firstly, and then the convex surface is sprayed, and the length of each segment is 4.5-7.0 m; the thickness of the finally formed tailing composite impermeable material layer is 11-13 cm;
5) inspection of ejection quality: after the spraying is finished, checking the sprayed impermeable material layer, and performing additional spraying on the positions with less spraying and missing spraying until the positions are qualified; finally forming a tailing composite anti-seepage material layer for preventing the migration of heavy metal ions.
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| CN109650793A (en) * | 2018-12-29 | 2019-04-19 | 青岛冠中生态股份有限公司 | A kind of impervious material and preparation method suitable for iron ore mine library |
| CN110042848A (en) * | 2019-04-25 | 2019-07-23 | 马钢集团矿业有限公司 | A kind of reconstruction Artificial Side-slope method of openpit impervious consolidation |
| CN114276080B (en) * | 2021-12-17 | 2022-12-20 | 武汉大学 | Impermeable layer material and application thereof |
| CN114455893B (en) * | 2022-01-27 | 2023-06-09 | 中国地质科学院矿产综合利用研究所 | Method for treating pollution of electrolytic manganese slag tailing pond by cementing controlled release |
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| CN106316287A (en) * | 2016-08-18 | 2017-01-11 | 大连地拓重工有限公司 | Method for preparing comprehensively stabilized pavement base material with iron tailings and waste rocks |
| CN106747119A (en) * | 2017-01-18 | 2017-05-31 | 包宗义 | The roadbase compound of special soil body stabilizing agent recycling treatment iron tailings manufacture |
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2018
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| CN203049629U (en) * | 2012-12-19 | 2013-07-10 | 贵州鑫恒生态环境工程有限公司 | Anti-seepage structure of tailing stock dump side slope |
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| CN104152148A (en) * | 2014-07-16 | 2014-11-19 | 中南大学 | Method for preparing pavement base material by stabilizing iron tailings by novel soil stabilizer |
| CN104831734A (en) * | 2015-04-24 | 2015-08-12 | 正坚建设有限公司 | Construction method of jet-grouting pile and composite soil-nailed wall support for deep foundation pit construction |
| CN104805872A (en) * | 2015-05-07 | 2015-07-29 | 重庆交通大学 | Composite anti-seepage structure for red mud tailing ponds |
| CN106316287A (en) * | 2016-08-18 | 2017-01-11 | 大连地拓重工有限公司 | Method for preparing comprehensively stabilized pavement base material with iron tailings and waste rocks |
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