CN112090918A - Construction process for in-situ control of coal gangue pollution release and soilless rapid ecological restoration - Google Patents
Construction process for in-situ control of coal gangue pollution release and soilless rapid ecological restoration Download PDFInfo
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- 229910052793 cadmium Inorganic materials 0.000 description 1
- BDOSMKKIYDKNTQ-UHFFFAOYSA-N cadmium atom Chemical compound [Cd] BDOSMKKIYDKNTQ-UHFFFAOYSA-N 0.000 description 1
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- WPBNNNQJVZRUHP-UHFFFAOYSA-L manganese(2+);methyl n-[[2-(methoxycarbonylcarbamothioylamino)phenyl]carbamothioyl]carbamate;n-[2-(sulfidocarbothioylamino)ethyl]carbamodithioate Chemical compound [Mn+2].[S-]C(=S)NCCNC([S-])=S.COC(=O)NC(=S)NC1=CC=CC=C1NC(=S)NC(=O)OC WPBNNNQJVZRUHP-UHFFFAOYSA-L 0.000 description 1
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B09—DISPOSAL OF SOLID WASTE; RECLAMATION OF CONTAMINATED SOIL
- B09B—DISPOSAL OF SOLID WASTE NOT OTHERWISE PROVIDED FOR
- B09B1/00—Dumping solid waste
- B09B1/004—Covering of dumping sites
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B09—DISPOSAL OF SOLID WASTE; RECLAMATION OF CONTAMINATED SOIL
- B09B—DISPOSAL OF SOLID WASTE NOT OTHERWISE PROVIDED FOR
- B09B3/00—Destroying solid waste or transforming solid waste into something useful or harmless
-
- 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
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- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Cultivation Of Plants (AREA)
Abstract
The invention relates to the technical field of mine pollution remediation, and discloses a construction process for in-situ control of coal gangue pollution release and soilless rapid ecological remediation. The construction process for in-situ control of coal gangue pollution release and rapid soilless ecological restoration can effectively inhibit acid production by oxidation in the process of stacking a large number of coal gangues, prevent various pollutants from dissolving out, form a good vegetation cover layer on a coal gangue pile, effectively control release of pollutants in the coal gangues, is economical and environment-friendly, has no subsequent maintenance cost, can realize the best effect of carrying out benefit, ecological benefit and social benefit, and can be widely popularized and used.
Description
Technical Field
The invention relates to the technical field of mine pollution remediation, in particular to a construction process for in-situ control of coal gangue pollution release and soilless rapid ecological remediation.
Background
The coal gangue is solid waste generated in the coal mining and washing processes, and is often rich in elements such as sulfur, iron, associated manganese, copper, zinc, arsenic, chromium, cadmium, mercury and the like, so that the coal gangue can be oxidized to generate acid under the combined action of rain and snow, oxygen in the atmosphere and microorganisms to form a large amount of acid mine wastewater (AMD) containing heavy metals, and the acid mine wastewater seriously pollutes surrounding farmlands and downstream water ecosystems.
At present, the coal gangue pollution is mainly covered by loam, the loam coverage belongs to passive protection, the effect is slow, the ecological treatment effect is poor, and meanwhile, large-scale loam rotation is needed during the loam coverage, so that the cost is high, the economic benefit is low, and the method is not beneficial to being widely popularized and used.
Disclosure of Invention
Technical problem to be solved
Aiming at the defects of the prior art, the invention provides a construction process for in-situ control of coal gangue pollution release and rapid soilless ecological restoration, which adds an inhibiting liquid into a coal gangue pile, can effectively inhibit acid production by oxidation in the process of stacking a large amount of coal gangue, and prevent various pollutants from dissolving out, thereby effectively controlling the pollution release in situ, and can provide good growing environment for plants by planting deep-rooted plants on a composite improved matrix layer, thereby forming a good vegetation cover layer, effectively controlling the release of pollutant substances of the coal gangue, being economic and environment-friendly, having no subsequent maintenance cost, realizing the best effects of carrying out benefit, ecological benefit and social benefit, being capable of widely popularizing and using the coal gangue, solving the problems that the pollution is mainly covered by soil, the soil cover belongs to passive protection, the effect is slow, and the ecological management effect is poor, meanwhile, when loam is covered, large-scale loam rotation is needed, so that the problems of high cost, low economic benefit and difficult vigorous popularization and use are caused.
(II) technical scheme
In order to achieve the purpose, the invention provides the following technical scheme: a construction process for in-situ control of coal gangue pollution release and soilless rapid ecological restoration,
step 1, stacking the yard: selecting a stacking place with a concave place or a pit, then carrying out artificial anti-seepage treatment on the stacking place to enable the stacking place to meet the standard anti-seepage requirement, stacking coal gangue in the processed concave place or pit, adding prepared inhibiting liquid into the coal gangue to submerge the coal gangue, and inhibiting the phenomenon of acid production caused by oxidation of the coal gangue in the stacking process;
step 2, preparing a composite improved matrix: mixing 10-30 parts of fly ash, 50-60 parts of Chinese herbal medicine residues, 10-20 parts of edible fungus waste residues and 20-30 parts of sludge together to prepare a composite improved matrix, laying the composite improved matrix on a coal gangue pile, planting deep-rooted plants on the surface of the composite improved matrix after the composite improved matrix is laid, wherein the distance between the deep-rooted plants is 4-5m, and sowing local plant seeds around the deep-rooted plants;
step 3, later-stage supervision: and arranging a detector at the edge of the pit or the pit for detecting the oxidation-reduction potential of the inhibition liquid, and then arranging a water level filling level at the position of the detector for adding the inhibition liquid and maintaining the deep-rooted plants at intervals of 30-40 days.
Preferably, the inhibiting solution comprises 10-20 parts of L-proline, 15-20 parts of D-proline, 20-30 parts of DL-proline, 1-5 parts of a polyacrylic acid solution mixture and 1-5 parts of an aqueous solution.
Preferably, the organic waste liquid is added to the deep-rooted plants at intervals of 4-7 days, and the organic waste liquid is excrement and waste water generated by breeding of dairy cows, pigs, chickens or ducks and livestock.
Preferably, the composite modified substrate is sprayed by a machine, and the thickness of the composite modified substrate laid on the coal gangue pile is 5-8 cm.
Preferably, the distance between each deep-rooted plant is 25-35cm, and the deep-rooted plants are acid-resistant plants.
Preferably, the inhibiting liquid is added when the oxidation-reduction potential of the immersion water sample at the position of 20-30cm of the coal gangue pile is maintained below 100-150 mv.
Preferably, the coal gangue pile is obliquely arranged, and the inclination angle is 15 degrees.
(III) advantageous effects
Compared with the prior art, the invention provides a construction process for in-situ control of coal gangue pollution release and rapid soilless ecological restoration, which has the following beneficial effects:
1. the construction process for in-situ control of coal gangue pollution release and rapid soilless ecological restoration can effectively inhibit acid production by oxidation in the process of stacking a large number of coal gangues by adding the inhibiting liquid into the coal gangue pile, and prevent various pollutants from dissolving out, thereby carrying out effective in-situ control on the pollution release, and can provide good growing environment for plants by planting deep-rooted plants on the composite improved matrix layer, thereby forming a good vegetation cover layer, effectively controlling the release of pollutants in the coal gangue, being economic and environment-friendly, having no subsequent maintenance cost, and realizing the best effects of benefit, ecological benefit and social benefit, and being widely popularized and used.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
A construction process for in-situ control of coal gangue pollution release and soilless quick ecological restoration comprises
Step 1, stacking the yard: selecting a stacking place with a concave place or a pit, then carrying out artificial anti-seepage treatment on the stacking place to enable the stacking place to meet the standard anti-seepage requirement, stacking coal gangue in the processed concave place or pit, adding prepared inhibiting liquid into the coal gangue to submerge the coal gangue, and inhibiting the phenomenon of acid production caused by oxidation of the coal gangue in the stacking process;
step 2, preparing a composite improved matrix: mixing 10-30 parts of fly ash, 50-60 parts of Chinese herbal medicine residues, 10-20 parts of edible fungus waste residues and 20-30 parts of sludge together to prepare a composite improved matrix, laying the composite improved matrix on a coal gangue pile, planting deep-rooted plants on the surface of the composite improved matrix after the composite improved matrix is laid, wherein the distance between the deep-rooted plants is 4-5m, and sowing local plant seeds around the deep-rooted plants;
step 3, later-stage supervision: and arranging a detector at the edge of the pit or the pit for detecting the oxidation-reduction potential of the inhibition liquid, and then arranging a water level filling level at the position of the detector for adding the inhibition liquid and maintaining the deep-rooted plants at intervals of 30-40 days.
Through adding the inhibiting liquid into the coal gangue pile, acid production by oxidation in the process of stacking a large number of coal gangues can be effectively inhibited, and dissolution of various pollutants is prevented, so that effective in-situ control is performed on pollution release, and good growing environment can be provided for plants by planting deep-rooted plants on the composite improved matrix layer, so that a good vegetation cover layer is formed, the release of pollutants in the coal gangues is effectively controlled, the composite improved matrix layer is economic and environment-friendly, no subsequent maintenance cost is caused, the optimal effect of performing benefit, ecological benefit and social benefit can be realized, and the composite improved matrix can be widely popularized and used
The inhibiting solution comprises 10-20 parts of L-proline, 15-20 parts of D-proline, 20-30 parts of DL-proline, 1-5 parts of a polyacrylic solution mixture and 1-5 parts of an aqueous solution.
The organic waste liquid is added to the deep-rooted plants every 4-7 days, and the organic waste liquid is excrement and waste water generated by breeding of dairy cows, pigs, chickens or ducks and livestock and poultry, provides necessary nutrient elements for the growth of the deep-rooted plants, and ensures the growth speed of the deep-rooted plants.
The composite improved substrate is sprayed by a machine, the thickness of the composite improved substrate paved on the coal gangue pile is 5-8cm, the spraying effect and efficiency can be improved by spraying the composite improved substrate by the machine, and the subsequent use of people is facilitated.
The distance between every two deep-rooted plants is 25-35cm, and the deep-rooted plants are acid-resistant plants, so that the growth of the deep-rooted plants is prevented from being influenced by too close distance.
Adding the inhibiting liquid when the oxidation-reduction potential of the immersed water sample at the position of 20-30cm of the coal gangue pile is maintained below 100-150mv, constantly ensuring that the inhibiting liquid oxidizes and produces acid in the stacking process of the coal gangue pile, and preventing various pollutants from being dissolved out, thereby effectively controlling the pollution release in situ.
The coal gangue pile is obliquely arranged, the inclination angle is 15 degrees, the flow of organic wastewater in the coal gangue pile can be facilitated, and the growth effect of deep-rooted plants is ensured.
Experimental example 1:
1. collecting a sulfur-containing coal gangue sample newly generated in coal mining area mining, air-drying, crushing, screening out slag with the size of less than 3mm, and storing for later use;
2. mixing 30 parts of fly ash, 60 parts of Chinese herbal medicine dregs, 10 parts of edible fungus waste dregs and 30 parts of sludge together according to the volume to prepare a composite improved substrate;
3. two polyethylene double-color plastic pots with the caliber of 15cm and the height of 13cm are adopted, prepared coal gangue samples are filled in the pots, the surface of one polyethylene double-color plastic pot is covered with a culture layer matrix with the thickness of 5cm, an inhibiting liquid is filled in the polyethylene double-color plastic pot, the inhibiting liquid comprises 20 parts of L-proline, 20 parts of D-proline, 20 parts of DL-proline, 3 parts of a polyacrylic solution mixture and 5 parts of an aqueous solution, the coal gangue samples are submerged, the other polyethylene double-color plastic pot is covered with loam and planted with deep-rooted plants as a control, and a plurality of deep-rooted plants are planted on the composite improved matrix;
4. pouring 500mL of rainwater for daily maintenance every time according to 1 time per week, sampling once per week, measuring the pH value, EC value, Eh, Fe, Mn, heavy metal and SO 42-content of percolate, and the test result shows that deep-rooted plants grow vigorously on a culture layer matrix, loam control plants grow slowly, and finally, the coal gangue after being treated is cultivated for half a year;
5. and (3) cultivating for a certain time, covering the whole pot with the deep-rooted plant, broadcasting the native plant seeds onto the surface of the matrix, normally managing, observing the seed germination after 2 weeks, and growing the plant after a certain time.
6. The detection of the percolate in the whole process discovers that the pH value of the percolate is neutral in the later period of potting, the content of various heavy metals is reduced by 20 +/-5 percent, and the method is economic and environment-friendly.
Experimental example 1:
1. collecting a sulfur-containing coal gangue sample newly generated in coal mining area mining, air-drying, crushing, screening out slag with the size of less than 3mm, and storing for later use;
2. mixing 20 parts of fly ash, 50 parts of Chinese herbal medicine dregs, 20 parts of edible fungus waste dregs and 20 parts of sludge together according to the volume to prepare a composite improved substrate;
3. two polyethylene double-color plastic pots with the caliber of 15cm and the height of 13cm are adopted, prepared coal gangue samples are filled in the pots, the surface of one polyethylene double-color plastic pot is covered with a culture layer matrix with the thickness of 5cm, an inhibiting liquid is filled in the polyethylene double-color plastic pot, the inhibiting liquid comprises 10 parts of L-proline, 10 parts of D-proline, 20 parts of DL-proline, 5 parts of a polyacrylic solution mixture and 5 parts of an aqueous solution, the coal gangue samples are submerged, the other polyethylene double-color plastic pot is covered with loam and planted with deep-rooted plants as a control, and a plurality of deep-rooted plants are planted on the composite improved matrix;
4. irrigating 500mL of rainwater every time for daily maintenance 2 times per week, sampling once per week, measuring the pH value, EC value, Eh, Fe, Mn, heavy metals and SO 42-content of percolate, and the test result shows that deep-rooted plants grow vigorously on a culture layer matrix, loam control plants grow slowly, and finally, the treated coal gangue is cultivated for half a year;
5. and (3) cultivating for a certain time, covering the whole pot with the deep-rooted plant, broadcasting the native plant seeds onto the surface of the matrix, normally managing, observing the seed germination after 2 weeks, and growing the plant after a certain time.
6. The detection of the percolate in the whole process discovers that the pH value of the percolate is neutral at the later stage of potting, and the content of various heavy metals is reduced by 20 +/-7%.
To sum up, the construction process for in-situ control of coal gangue pollution release and rapid soilless ecological restoration can effectively inhibit acid production by oxidation in the process of stacking a large number of coal gangues and prevent various pollutants from dissolving out by adding the inhibiting liquid into the coal gangue pile when in use, thereby effectively controlling the pollution release in-situ, and can provide good growing environment for plants by planting deep-rooted plants on the composite improved matrix layer, thereby forming a good vegetation cover layer, effectively controlling the release of pollutants in the coal gangue, being economic and environment-friendly, having no subsequent maintenance cost, realizing the best effect of benefit, ecological benefit and social benefit, and being widely popularized and used.
It is to be noted that the term "comprises," "comprising," or any other variation thereof is intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (7)
1. A construction process for in-situ control of coal gangue pollution release and soilless rapid ecological restoration is characterized by comprising the following steps:
step 1, stacking the yard: selecting a stacking place with a concave place or a pit, then carrying out artificial anti-seepage treatment on the stacking place to enable the stacking place to meet the standard anti-seepage requirement, stacking coal gangue in the processed concave place or pit, adding prepared inhibiting liquid into the coal gangue to submerge the coal gangue, and inhibiting the phenomenon of acid production caused by oxidation of the coal gangue in the stacking process;
step 2, preparing a composite improved matrix: mixing 10-30 parts of fly ash, 50-60 parts of Chinese herbal medicine residues, 10-20 parts of edible fungus waste residues and 20-30 parts of sludge together to prepare a composite improved matrix, laying the composite improved matrix on a coal gangue pile, planting deep-rooted plants on the surface of the composite improved matrix after the composite improved matrix is laid, wherein the distance between the deep-rooted plants is 4-5m, and sowing local plant seeds around the deep-rooted plants;
step 3, later-stage supervision: and arranging a detector at the edge of the pit or the pit for detecting the oxidation-reduction potential of the inhibition liquid, and then arranging a water level filling level at the position of the detector for adding the inhibition liquid and maintaining the deep-rooted plants at intervals of 30-40 days.
2. The construction process for in-situ control of coal gangue pollution release and rapid soilless ecological restoration according to claim 1, characterized in that: the inhibiting solution comprises 10-20 parts of L-proline, 15-20 parts of D-proline, 20-30 parts of DL-proline, 1-5 parts of a polyacrylic solution mixture and 1-5 parts of an aqueous solution.
3. The construction process for in-situ control of coal gangue pollution release and rapid soilless ecological restoration according to claim 1, characterized in that: adding organic waste liquid into the deep-rooted plants at intervals of 4-7 days, wherein the organic waste liquid is excrement and waste water generated by breeding dairy cows, pigs, chickens or ducks and livestock.
4. The construction process for in-situ control of coal gangue pollution release and rapid soilless ecological restoration according to claim 1, characterized in that: the composite modified substrate is sprayed by a machine, and the thickness of the composite modified substrate laid on the coal gangue pile is 5-8 cm.
5. The construction process for in-situ control of coal gangue pollution release and rapid soilless ecological restoration according to claim 1, characterized in that: the distance between each deep-rooted plant is 25-35cm, and the deep-rooted plants are acid-resistant plants.
6. The construction process for in-situ control of coal gangue pollution release and rapid soilless ecological restoration according to claim 1, characterized in that: adding the inhibiting liquid when the oxidation-reduction potential of the immersed water sample at the position of 20-30cm of the coal gangue pile is maintained below 100-150 mv.
7. The construction process for in-situ control of coal gangue pollution release and rapid soilless ecological restoration according to claim 1, characterized in that: the coal gangue pile is obliquely arranged, and the inclination angle is 15 degrees.
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| CN110402635A (en) * | 2019-08-18 | 2019-11-05 | 贵州鸿璟稀有金属开发应用科技有限公司 | A kind of efficient ecological restoration method for coal gangue dump |
| CN111011159A (en) * | 2019-12-30 | 2020-04-17 | 北京林业大学 | Preparation method of ecological improvement matrix based on coal gangue and sludge |
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| CN103272826A (en) * | 2013-05-17 | 2013-09-04 | 贵州大学 | Method for realizing in-situ control of coal gangue pollution through organic river system coverage |
| CN107080916A (en) * | 2017-05-12 | 2017-08-22 | 贵州大学 | The material and method of release in-situ control are polluted for coal gangue storage yard |
| CN110402635A (en) * | 2019-08-18 | 2019-11-05 | 贵州鸿璟稀有金属开发应用科技有限公司 | A kind of efficient ecological restoration method for coal gangue dump |
| CN111011159A (en) * | 2019-12-30 | 2020-04-17 | 北京林业大学 | Preparation method of ecological improvement matrix based on coal gangue and sludge |
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Application publication date: 20201218 |