CN113944150A - Method for repairing abandoned mine by using titanium gypsum as impervious lining - Google Patents
Method for repairing abandoned mine by using titanium gypsum as impervious lining Download PDFInfo
- Publication number
- CN113944150A CN113944150A CN202111222267.1A CN202111222267A CN113944150A CN 113944150 A CN113944150 A CN 113944150A CN 202111222267 A CN202111222267 A CN 202111222267A CN 113944150 A CN113944150 A CN 113944150A
- Authority
- CN
- China
- Prior art keywords
- layer
- titanium gypsum
- repairing
- impermeable
- percolate
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Images
Classifications
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D3/00—Improving or preserving soil or rock, e.g. preserving permafrost soil
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B09—DISPOSAL OF SOLID WASTE; RECLAMATION OF CONTAMINATED SOIL
- B09B—DISPOSAL OF SOLID WASTE
- B09B1/00—Dumping solid waste
-
- 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
- E02D31/025—Draining membranes, sheets or fabric specially adapted therefor, e.g. with dimples
-
- E—FIXED CONSTRUCTIONS
- E03—WATER SUPPLY; SEWERAGE
- E03F—SEWERS; CESSPOOLS
- E03F3/00—Sewer pipe-line systems
- E03F3/04—Pipes or fittings specially adapted to sewers
-
- E—FIXED CONSTRUCTIONS
- E03—WATER SUPPLY; SEWERAGE
- E03F—SEWERS; CESSPOOLS
- E03F5/00—Sewerage structures
- E03F5/04—Gullies inlets, road sinks, floor drains with or without odour seals or sediment traps
-
- 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
- Y02W30/30—Landfill technologies aiming to mitigate methane emissions
Abstract
The invention relates to a method for repairing a waste mine by using titanium gypsum as an anti-seepage lining, which is characterized in that the overall structure for repairing the waste mine is sequentially composed of the anti-seepage lining, a percolate drainage guide layer, a filling material layer and a closure soil covering layer from bottom to top, wherein the anti-seepage lining is made of the titanium gypsum. The construction method comprises the following steps: firstly laying an impermeable layer, secondly laying a percolate guide and discharge layer, then filling a material layer, and finally forming a field-closing covering soil layer. The titanium gypsum used as the raw material of the anti-seepage lining layer has rich sources, and the solid waste resources are fully utilized, so that not only is a large amount of disposal cost saved for the titanium dioxide industry, but also a large amount of raw materials and resources are saved, and better economic and social benefits are achieved.
Description
Technical Field
The invention relates to the field of abandoned mine restoration and solid waste pollution prevention, in particular to a method for restoring an abandoned mine by using titanium gypsum as an anti-seepage lining.
Background
For the repair of abandoned mines, China is in the exploration and practice stage, and the different properties of various metal or nonmetal mines lead to different difficulties in the repair of abandoned mines. At present, a large number of abandoned mines are urgently to be repaired.
At present, the market demand of titanium dioxide is large, but titanium gypsum is used as the main solid waste generated in the production process of enterprises in the industry, the production amount is extremely large, and the annual production amount of large-scale enterprises reaches over 100 million tons. The titanium gypsum has the characteristics of limited treatment direction, high cost of landfill treatment, low utilization rate and the like, and does not conform to the principle of solid waste resource in China.
In 2020, China revises the general industrial solid waste storage and landfill pollution control standard, and from the perspective of solid waste resource utilization, waste mine backfill treatment is allowed to be carried out on general industrial solid waste conforming to the class I.
In 2020, China has gone out the technical guide for the recycling and pollution prevention of solid wastes, and the technical requirements for the pollution prevention of building materials, land utilization and the like of the solid wastes are clear.
Disclosure of Invention
Aiming at the technical problems in the industry, the invention provides a method for repairing a waste mine by using titanium gypsum as an impermeable lining, which can overcome the problem of the existing solid waste disposal in the titanium dioxide industry under the permission of policy conditions and synergistically recover the waste mine.
In order to achieve the technical aim, the implementation steps of the technical scheme of the invention are as follows:
the method for repairing the abandoned mine by using the titanium gypsum as the anti-seepage lining comprises the steps of sequentially forming the anti-seepage lining, the percolate guide and discharge layer, the filling material layer and the closure soil covering layer from bottom to top, wherein the anti-seepage lining is made of the titanium gypsum.
The construction method comprises the following steps:
a) firstly, laying an impermeable layer, wherein a titanium gypsum is adopted as an impermeable structure in a pit bottom impermeable system, firstly, titanium gypsum with the thickness not less than 500mm is buried and compacted to be used as a protective layer and the impermeable layer, two pressure relief wells are arranged below the impermeable layer to control the pressure of initial underground water, and each pressure relief well consists of a reinforced concrete well body and radial blind drain pipes for draining and permeating;
b) secondly, laying a percolate guide and drainage layer, wherein the percolate guide and drainage layer comprises a radiation well and a drainage blind pipe, a longitudinal blind pipe is arranged along the western boundary of the percolate guide and drainage system, a percolate collecting channel is arranged at the tail end of the main blind pipe along the downslope, and the percolate is collected and then discharged into a percolate collecting pool through the percolate collecting channel; the well body of the radiation well is made of reinforced concrete;
c) then filling a material layer, and filling by adopting I-type general industrial solid waste;
d) finally, covering the whole finally repaired surface with clay with the thickness of more than 200mm, and covering the whole finally repaired surface with a topsoil layer of ploughing and planting soil with the thickness of more than 300 mm.
The titanium gypsum of the seepage-proofing lining layer has an organic matter content of less than 2% and a soluble salt content of less than 2%.
The saturated permeability coefficient of the compacted titanium gypsum of the impervious lining layer is not more than 1.0 multiplied by 10 < -5 > cm/s, and the thickness of the compacted titanium gypsum is not less than 0.75 m.
In the step a), the compactness of the titanium gypsum is more than 93 percent, and the seepage-proofing performance of the titanium gypsum is better than that of titanium gypsum with the permeability coefficient of 10 through detection-5cm/s, thickness greater than 0.75m measured using RTK.
In the step b), the depth of the radiation well is 20m, each layer is overlapped by 10m, 2 layers are arranged below the +20m elevation, 1 layer is arranged above the +20m elevation, and finally the well top elevation is +50 m.
In the step c), filling to the designed elevation +50 to +75 m.
The slope of the top surface is 2% after closing, and the slope gradually decreases from the middle to the two sides.
The invention has the beneficial effects that:
the method for repairing the abandoned mine by using the titanium gypsum as the impervious lining has the technical benefits that: the barrier liners of class I general industrial solid waste landfills typically require the consumption of large amounts of clay resources, or other barrier materials of equal effectiveness, waste of clay resources, and high economic costs. The titanium gypsum used as the raw material of the anti-seepage lining layer has rich sources, and the solid waste resources are fully utilized, so that a large amount of disposal cost is saved for the titanium dioxide industry, and a large amount of raw materials and resources are saved.
The method for repairing the abandoned mine by using the titanium gypsum as the impervious lining has the following economic and social benefits: the titanium gypsum is used as the anti-seepage lining layer to restore the abandoned mine, so that the green concept of solid waste recycling is realized, the local ecological environment quality is improved for realizing green mine construction and ecological civilization construction, and further the development of industry and local economy and the improvement of social green concept are promoted.
Drawings
In order to more clearly describe the embodiments of the present invention, the drawings used in the embodiments will be briefly described below. The accompanying drawings are examples of the invention showing a method of repairing a abandoned mine using titanium gypsum as an impermeable lining.
FIG. 1 is a schematic representation of a construction utilizing titanium gypsum as a barrier liner.
In the figure, 1 is an impervious lining layer, 2 is a percolate drainage guide layer, 3 is a filling material layer, and 4 is a sealing field covering soil layer.
Detailed Description
The above-mentioned contents of the present invention are further described in detail by way of examples below, but it should not be understood that the scope of the above-mentioned subject matter of the present invention is limited to the following examples, and any technique realized based on the above-mentioned contents of the present invention falls within the scope of the present invention.
As shown in fig. 1, according to the method for repairing a abandoned mine by using titanium gypsum as an impermeable lining according to an embodiment of the present invention, the impermeable lining 1, the percolate drainage guide layer 2, the filling material layer 3 and the closure covering soil layer 4 are arranged from bottom to top in sequence. The titanium gypsum in the anti-seepage lining 1 is from a certain titanium dioxide production enterprise in Anhui, and has industrial representativeness. The titanium gypsum is produced by the waste water produced by titanium concentrate (main component TiO2 is more than or equal to 46%) through the production process of ore grinding, acidolysis, sedimentation, slag washing, ferrous separation, concentration, hydrolysis, primary washing, bleaching, secondary washing, salt treatment, calcination, crushing and the likeIs produced by the treatment processes of neutralization, plate-and-frame filter pressing, radial flow precipitation and flocculation sedimentation, and mainly contains CaSO4·2H2O, having a high viscosity.
The abandoned mine is located in a certain grade city of Anhui province, taking an iron ore abandoned mine restoration project conforming to local planning as an example, the lowest elevation of the bottom of the abandoned mine pit is-10 m, the south side seal design elevation of the mine pit is +50m, the north side seal design elevation is +75m, the depth of the mine pit is about 30-70m, and the area of the upper opening is 16hm2Lower opening area of 8.48hm2Total reservoir capacity of about 792 km3The effective utilization rate is about 0.9.
Table 1 is a table of the analysis results of the organic content of titanium gypsum. 100 parts of titanium gypsum sample is selected for detection and analysis, and the organic matter content is between 0.01 and 1.88 percent.
Table 2 shows the results of analysis of the soluble salt content of titanium gypsum. 100 parts of titanium gypsum sample is selected for detection and analysis, and the content of soluble salt is between 0.01 and 0.78 percent.
Table 3 is a table of results of characteristic contaminant detection analysis. 100 parts of titanium gypsum samples are selected for detection and analysis, heavy metal indexes such as lead, mercury, chromium, hexavalent chromium, cadmium, arsenic, thallium, antimony, nickel, copper, zinc, silver, vanadium, manganese, cobalt and the like, and indexes of organic matters such as VOCs and SVOCs are screened, and the determined characteristic pollutants meet the pollutant concentration limit value requirement of class I general industrial solid wastes in general industrial solid waste storage and landfill pollution control standards.
Table 4 is a table of saturated permeability coefficient test results of the pretreated titanium gypsum. 100 parts of titanium gypsum sample is selected for detection and analysis, and the saturated permeability coefficient is between 5.6 multiplied by 10-7～1.3×10-6cm/s.
The concrete construction method for repairing the abandoned mine by using the titanium gypsum as the alternative impermeable lining layer comprises the following steps:
firstly laying an impermeable layer 1, designing a pit bottom impermeable system by adopting an impermeable structure scheme of titanium gypsum, firstly burying the titanium gypsum with the thickness of not less than 500mm and compacting the titanium gypsum to form a protective layer and an impermeable layer, wherein the compactness is more than 93 percent, and the impermeable performance is detected to be superior to that of the impermeable layer with the permeability coefficient of 10-5cm/s, the thickness is measured by RTK and is more than 0.75m, two pressure relief wells are arranged below the impermeable layer to control the initial underground water pressure, and each pressure relief well consists of a reinforced concrete well body and radial seepage-removing blind ditch pipes.
Secondly lay filtration liquid drainage guide layer 2, including radiant well and row infiltration blind pipe, filtration liquid drainage guide system lays vertical blind pipe along western boundary, and the terminal along the downslope of main blind pipe arranges filtration liquid collection ditch, and filtration liquid is collected the back and is discharged by filtration liquid collection ditch and send into filtration liquid collecting tank. The well body of the radiation well is made of reinforced concrete, the depth of the radiation well is 20m, each layer is overlapped by 10m and is arranged below the elevation of +20m, each layer is arranged by 2, each layer is arranged above +20m, and the final well top elevation is +50 m.
Then a material filling layer 3 is filled by general industrial solid wastes of type I until the designed elevation is plus 50 to plus 75 m.
And finally, covering the whole finally repaired surface with clay with the thickness of more than 200mm, and then covering the whole finally repaired surface with a topsoil layer of planting soil with the thickness of more than 300mm, wherein the plant growth is mainly promoted, and the slope of the top surface is 2% after the field is closed, and the slope gradually decreases from the middle to the two sides.
The above description is only a preferred embodiment of the present invention, and should not be taken as limiting the invention in any way, and any person skilled in the art can make any simple modification, equivalent replacement, and improvement on the above embodiment without departing from the technical spirit of the present invention, and still fall within the protection scope of the technical solution of the present invention.
Claims (8)
1. A method for repairing a waste mine by using titanium gypsum as an impermeable lining is characterized by comprising the following steps: the overall structure of the abandoned mine restoration is composed of an impermeable lining layer (1), a percolate guide and discharge layer (2), a filling material layer (3) and a sealing cover soil layer (4) from bottom to top in sequence, wherein the impermeable lining layer (1) is made of titanium gypsum.
2. The method for repairing the abandoned mine by using the titanium gypsum as the impervious lining according to claim 1, which is characterized in that the construction method comprises the following steps:
a) firstly, laying an impermeable layer (1), wherein a titanium gypsum is adopted as an impermeable structure for a pit bottom impermeable system, firstly, titanium gypsum with the thickness of not less than 500mm is buried and compacted to be used as a protective layer and the impermeable layer, two pressure relief wells are arranged below the impermeable layer to control the pressure of initial underground water, and each pressure relief well consists of a reinforced concrete well body and radial seepage drainage blind ditch pipes;
b) secondly, laying a percolate guide and drainage layer (2) which comprises a radiation well and a percolate drainage blind pipe, wherein a longitudinal blind pipe is arranged along the western boundary of the percolate guide and drainage system, a percolate collection ditch is arranged at the tail end of the main blind pipe along the downslope, and the percolate is collected and then discharged into a percolate collection pond through the percolate collection ditch; the well body of the radiation well is made of reinforced concrete;
c) then filling a material layer (3), and filling by adopting I-type general industrial solid waste;
d) finally, an enclosed field covering soil layer (4) is formed, the clay with the thickness of more than 200mm covers the whole finally repaired surface, and then the surface soil layer with the thickness of more than 300mm of ploughed and planted soil covers the whole finally repaired surface.
3. The method for repairing the abandoned mine by using the titanium gypsum as the impervious liner according to claim 1, which is characterized in that: the titanium gypsum of the seepage-proofing lining layer (1) has an organic matter content of less than 2% and a soluble salt content of less than 2%.
4. The method for repairing the abandoned mine by using the titanium gypsum as the impervious liner according to claim 1, which is characterized in that: the titanium gypsum of the impervious lining layer (1) has a saturated permeability coefficient of not more than 1.0 x 10 < -5 > cm/s after being compacted and a thickness of not less than 0.75 m.
5. The method for repairing the abandoned mine by using the titanium gypsum as the impervious liner according to claim 2, which is characterized in that: in the step a), the compactness of the titanium gypsum is more than 93 percent, and the seepage-proofing performance of the titanium gypsum is better than that of titanium gypsum with the permeability coefficient of 10 through detection-5cm/s, thickness greater than 0.75m measured using RTK.
6. The method for repairing the abandoned mine by using the titanium gypsum as the impervious liner according to claim 2, which is characterized in that: in the step b), the depth of the radiation well is 20m, each layer is overlapped by 10m, 2 layers are arranged below the +20m elevation, 1 layer is arranged above the +20m elevation, and finally the well top elevation is +50 m.
7. The method for repairing the abandoned mine by using the titanium gypsum as the impervious liner according to claim 2, which is characterized in that: in the step c), filling to the designed elevation +50 to +75 m.
8. The method for repairing the abandoned mine by using the titanium gypsum as the impervious liner according to claim 2, which is characterized in that: the slope of the top surface is 2% after closing, and the slope gradually decreases from the middle to the two sides.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111222267.1A CN113944150B (en) | 2021-10-20 | 2021-10-20 | Method for repairing abandoned mine by using titanium gypsum as impermeable lining layer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111222267.1A CN113944150B (en) | 2021-10-20 | 2021-10-20 | Method for repairing abandoned mine by using titanium gypsum as impermeable lining layer |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN113944150A true CN113944150A (en) | 2022-01-18 |
| CN113944150B CN113944150B (en) | 2023-05-26 |
Family
ID=79332047
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111222267.1A Active CN113944150B (en) | 2021-10-20 | 2021-10-20 | Method for repairing abandoned mine by using titanium gypsum as impermeable lining layer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113944150B (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201924381U (en) * | 2011-02-01 | 2011-08-10 | 深圳市胜义环保有限公司 | Side slope film paving structure for ardealite slag field |
| CN103790183A (en) * | 2014-01-17 | 2014-05-14 | 洛阳广鑫建设集团有限公司 | Application method for red mud in red mud storage yard impermeable layer |
| US20180016766A1 (en) * | 2015-06-16 | 2018-01-18 | Hohai University | Municipal solid waste landfill barrier system capable of prolonging breakthrough time of leachate and manufacturing method thereof |
| CN107593018A (en) * | 2017-09-15 | 2018-01-19 | 大连地拓环境科技有限公司 | A kind of method and conditioned soil by Abandoned Land of Mine reparation into nursery land used |
| CN108395126A (en) * | 2018-04-18 | 2018-08-14 | 山东安澜工程建设有限公司 | A kind of impervious blocking material and the application in hydraulic engineering |
| CN213867863U (en) * | 2020-11-03 | 2021-08-03 | 生态环境部南京环境科学研究所 | General industrial solid waste storage and disposal site structure based on abandoned mine |
-
2021
- 2021-10-20 CN CN202111222267.1A patent/CN113944150B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201924381U (en) * | 2011-02-01 | 2011-08-10 | 深圳市胜义环保有限公司 | Side slope film paving structure for ardealite slag field |
| CN103790183A (en) * | 2014-01-17 | 2014-05-14 | 洛阳广鑫建设集团有限公司 | Application method for red mud in red mud storage yard impermeable layer |
| US20180016766A1 (en) * | 2015-06-16 | 2018-01-18 | Hohai University | Municipal solid waste landfill barrier system capable of prolonging breakthrough time of leachate and manufacturing method thereof |
| CN107593018A (en) * | 2017-09-15 | 2018-01-19 | 大连地拓环境科技有限公司 | A kind of method and conditioned soil by Abandoned Land of Mine reparation into nursery land used |
| CN108395126A (en) * | 2018-04-18 | 2018-08-14 | 山东安澜工程建设有限公司 | A kind of impervious blocking material and the application in hydraulic engineering |
| CN213867863U (en) * | 2020-11-03 | 2021-08-03 | 生态环境部南京环境科学研究所 | General industrial solid waste storage and disposal site structure based on abandoned mine |
Non-Patent Citations (1)
| Title |
|---|
| 谷泓坤: "某矿区历史遗留氰化废渣处置的设计实例", 《湖南有色金属》 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN113944150B (en) | 2023-05-26 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| Hornsey et al. | The impact of mining solutions/liquors on geosynthetics | |
| US5201609A (en) | Cellular landfill process and apparatus | |
| Fourie et al. | Improving the performance of mining infrastructure through the judicious use of geosynthetics | |
| CN206028294U (en) | Ecological processing system of electrolytic manganese sediment safety | |
| CN205990603U (en) | A kind of ecoscape revetment structure of in-situ immobilization heavy metal pollution river bottom mud | |
| Taha et al. | Groundwater quality at two landfill sites in Selangor, Malaysia. | |
| CN102493397A (en) | In-situ landfill and island creation method for recycling polluted bed-mud dehydrated by geotextile tubes | |
| CN104923544A (en) | Heavy metal dangerous waste in-situ storage and underground water pollution prevention method | |
| CN111282954A (en) | Sodium sulfide waste residue soil pollution risk management and control system | |
| CN110607808A (en) | In-situ barrier coiled material for preventing pollutant from diffusing, preparation method and construction method | |
| Wolkersdorfer et al. | Contemporary reviews of mine water studies in Europe, Part 3 | |
| CN113944150B (en) | Method for repairing abandoned mine by using titanium gypsum as impermeable lining layer | |
| Williams | Chapter VI: The Role of Technology and Innovation in Improving Tailings Management | |
| Cacciuttolo et al. | Water management in the closure of tailings storage facilities | |
| CN211948583U (en) | Prevent normal position separation coiled material of pollutant diffusion | |
| Graham et al. | PAH-contaminated sediment remediation: An overview of a proposed large scale clean-up in a freshwater harbour | |
| von Maubeuge | Geosynthetic barriers in regulations and recommendations in line with the ISO design guide? | |
| Golimowski et al. | Assessment of remedial works effectiveness on water quality in the vicinity of Łubna landfill based on monitoring research | |
| CN110130307A (en) | A kind of ecological restoration of mine system and ecological restoring method | |
| Harries et al. | Rehabilitation measures at the Rum Jungle mine site | |
| CN204769830U (en) | Useless normal position system with groundwater pollution control that seals up up for safekeeping of heavy metal danger | |
| Spitz et al. | Tailings disposal: Concepts and practices | |
| Post et al. | The Use of Geosynthetics in Mining Works. | |
| Wei et al. | Application and case study of barrier technology in soil and groundwater remediation | |
| CN208562052U (en) | A kind of Gangue body diffusate ecological purification system |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |