CN110980830A - Method for repairing underground water pollution by well digging and intercepting - Google Patents
Method for repairing underground water pollution by well digging and intercepting Download PDFInfo
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- CN110980830A CN110980830A CN201911278945.9A CN201911278945A CN110980830A CN 110980830 A CN110980830 A CN 110980830A CN 201911278945 A CN201911278945 A CN 201911278945A CN 110980830 A CN110980830 A CN 110980830A
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
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- E—FIXED CONSTRUCTIONS
- E03—WATER SUPPLY; SEWERAGE
- E03B—INSTALLATIONS OR METHODS FOR OBTAINING, COLLECTING, OR DISTRIBUTING WATER
- E03B3/00—Methods or installations for obtaining or collecting drinking water or tap water
- E03B3/32—Methods or installations for obtaining or collecting drinking water or tap water with artificial enrichment, e.g. by adding water from a pond or a river
- E03B3/34—Methods or installations for obtaining or collecting drinking water or tap water with artificial enrichment, e.g. by adding water from a pond or a river of underground water
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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
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- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A20/00—Water conservation; Efficient water supply; Efficient water use
- Y02A20/40—Protecting water resources
- Y02A20/406—Aquifer recharge
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Abstract
The invention discloses a method for repairing underground water pollution by well digging and intercepting, and particularly relates to the field of water pollution prevention and control, wherein a plurality of groups of repairing systems are arranged around a pollution source in underground water in a pollution area, each group of repairing systems comprises a main pumping well and an auxiliary pumping well, the auxiliary pumping wells are arranged on one sides close to the pollution source, and monitoring wells are arranged on two sides of the auxiliary pumping wells and one side of the main pumping well, which is far away from the auxiliary pumping wells; the concrete repairing steps are as follows: s1, single-well and multi-well water pumping experiments are carried out, and hydrogeological parameters of areas around the polluted area are determined; s2, determining an optimal interception area; s3, determining the well drilling positions and the number; and S4, preventing, controlling and repairing the groundwater pollution in the polluted area. The invention utilizes the characteristic that the metal dressing plant has low requirement on water quality, and the like, and the extracted underground water is directly sent to the dressing plant to be used as water supplement for recycling; on one hand, the use amount of a clean water source is reduced, and on the other hand, the expensive cost for treating polluted water is saved.
Description
Technical Field
The invention relates to the technical field of water pollution prevention and control, in particular to a method for repairing underground water pollution by well digging interception.
Background
China's groundwater remediation is at the primary stage at present, is relatively extensive and lacks of symbolic achievements and normative technologies. Common techniques currently used are: physical treatment methods (screening, passive collection); a hydrodynamic control method; a drawing-out treatment method; and in-situ treatment method, which is used at home and abroad, but has higher cost and higher energy consumption.
In addition, some metal concentration plants and the like have low requirements on water quality and are relatively wasted by directly using clean tap water for processing and using, so that the invention provides a method for repairing underground water pollution by intercepting the flow of underground water, which can be directly sent to the plants with low requirements on water quality as replenishing water for recycling.
Disclosure of Invention
In order to overcome the defects in the prior art, the embodiment of the invention provides a method for repairing underground water pollution by well digging and intercepting, which utilizes the characteristic that the requirement on water quality of a metal concentrating mill and the like is not high, and pumped underground water is directly sent to the concentrating mill to be used as water supplement for recycling; on one hand, the use amount of a clean water source is reduced, and on the other hand, the expensive cost for treating polluted water is saved.
In order to achieve the purpose, the invention provides the following technical scheme: the utility model provides a system for repairing groundwater pollution dams is beaten well to the pollution source of pollution area groundwater encircles for the center and sets up multiunit repair system, every group repair system all includes main pumped well and supplementary pumped well, supplementary pumped well sets up in being close to pollution source one side, supplementary pumped well both sides and main pumped well keep away from one side of supplementary pumped well all are equipped with the monitoring well.
The invention also provides a method for repairing underground water pollution by well digging interception, which comprises the following concrete repairing steps:
s1, single well and multi-well water pumping experiments, determining hydrogeological parameters of the surrounding areas of the polluted area, including:
s1.1, single-well and multi-well water pumping experiments: carrying out single-well water pumping, multi-well water pumping and cluster well interference water pumping tests, wherein the water pumping tests aim to find out the permeability of a water-bearing stratum, the size of water inflow, the buried motion characteristics of underground water and the hydraulic connection among the water-bearing strata;
s1.2, determining hydrogeological parameters of peripheral areas of the polluted area: determining hydrogeological parameters of aquifers, providing required hydrogeological data for water intake design, providing basis for calculating the water yield of underground water aquifers around a tailing pond and a scheme for repairing underground water around a repairing zone, and monitoring underground water quality indexes of a pumping well and a monitoring well;
s2, determining an optimal interception area: tracking the diffusion range of underground water pollutants by using a single well and a monitoring well which are arranged around the polluted area, and determining the flow direction, the flow speed and the movement radius of the underground water around the polluted area so as to determine an optimal interception area;
s3, determining well drilling positions and quantities: a plurality of groups of repair systems are laid around the pollution source in the underground water of the pollution area, each group of repair systems consists of a main pumping well and an auxiliary pumping well, the main pumping well is laid at the center of the distance between the pollution source and the pollution periphery, the auxiliary pumping well is arranged on one side of the pollution source, and monitoring wells are laid on two sides of the auxiliary pumping well and the other side of the main pumping well far away from the auxiliary pumping well;
s4, prevention, control and repair of groundwater pollution in the polluted area, comprising:
s4.1, through the matched pumping work of the main pumping well and the auxiliary pumping well of the surrounding zone of the polluted area, monitoring the water level and the water quality change by matching with a monitoring well, forming a surrounding zone low water level zone according to the requirements of observing the water level depth reduction, the water inflow and the water level change, the observation frequency and precision and the requirement of restoring water level observation, and realizing underground water backflow;
and S4.2, pumping water by using a single well and pumping water by using multiple wells, controlling the water yield and water level change of the pumping wells, and realizing combined prevention and control of underground water pollution.
In a preferred embodiment, the main pumping well and the auxiliary pumping well can be used as monitoring wells for monitoring water level, water flow direction and pollutant concentration.
In a preferred embodiment, in step S1, the single-well pumping is performed by using one main pumping well, the multi-well pumping is performed by using one group of repair systems, and the group-well interference pumping is performed by using multiple groups of repair systems.
In a preferred embodiment, in step S1.2, the hydrogeological parameters of the aquifer are: permeability coefficient K, influence radius R.
In a preferred embodiment, in step S1.2, the hydrogeological data is specifically influence radius, single well water production, unit water production, interwell disturbance water production, disturbance coefficient.
In a preferred embodiment, in order to determine the heterogeneity of the aquifer in different directions or determine the pumping influence radius, two groups of monitoring wells are arranged by taking the main pumping well and the auxiliary pumping well as the center according to different conditions of the aquifer, and two observation lines are formed: one vertical underground water flow direction and one parallel underground water flow direction are used for measuring the heterogeneity of the aquifer in different directions or determining the pumping influence radius.
In a preferred embodiment, in step S4.1, after the main pumping well starts pumping water, the groundwater level of the main pumping well drops, and the groundwater around the main pumping well starts to flow back to the main pumping well centering on the main pumping well, so as to form a groundwater return funnel, where the main pumping well is centered on the funnel.
In a preferred embodiment, in step S4.1, the auxiliary pumping well performs auxiliary pumping on the side of the pollutant source, so as to increase the negative pressure of the groundwater and increase the backflow strength of the groundwater far from the side of the pollutant source.
The invention has the technical effects and advantages that:
1. the underground water backflow funnel is formed by a main pumping well and an auxiliary pumping well, after the main pumping well starts pumping water, the underground water level of the main pumping well descends, and the underground water around the main pumping well starts to flow back to the main pumping well by taking the main pumping well as the center of the main pumping well; auxiliary water pumping is carried out on one side of a pollutant source, the negative pressure of the underground water is increased, the reflux strength of the underground water on the side far away from the pollutant source is increased, and the remediation effect of the underground water pollution is enhanced;
2. compared with the traditional diaphragm wall construction technology, the diaphragm wall construction technology has the advantages of low cost, consideration of source blockage and restoration, simple and feasible design idea, no expensive material, and no water source waste because the water body is used for a concentration plant with low requirement on water quality;
3. the invention utilizes the characteristic of low requirement on water quality of metal ore dressing plants and the like, and the extracted underground water is directly sent to the ore dressing plants to be used as water supplement for recycling, thereby reducing the use amount of clean water sources and saving the expensive cost for treating polluted water.
Drawings
Fig. 1 is a schematic view of the overall structure of the present invention.
FIG. 2 is an overall flow chart of the present invention.
The reference signs are: 1. a main pumping well; 2. a monitoring well; 3. auxiliary pumping wells; 4. original ground water level; 5. the water level of the main pumping well after pumping water; 6. a funnel-shaped water line is formed after the main pumping well pumps water; 7. the flow direction of underground water after pumping; 8. assisting the underground water level after pumping water from the pumping well; 9. a funnel-shaped water line is formed after the auxiliary pumping well pumps water; 10. a groundwater level lower rock layer; 11. the water pumping direction of the main pumping well; 12. and the water pumping direction of the water pumping well is assisted.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in 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.
According to the system that groundwater pollution was restoreed in drawing a well closure that shows of figure 1 to the pollution source of pollution area groundwater encircles for the center and sets up multiunit repair system, every group repair system all includes main pumping well 1 and supplementary pumping well 3, supplementary pumping well 3 sets up in being close to pollution source one side, supplementary pumping well 3 both sides and main pumping well 1 keep away from one side of supplementary pumping well 3 and all are equipped with monitoring well 2.
The main pumping well 1 and the auxiliary pumping well 3 can be used as a monitoring well 2 for monitoring the water level, the water flow direction and the pollutant concentration.
The invention also provides a method for repairing underground water pollution by well digging interception, which is shown in figure 2 and comprises the following concrete repairing steps:
s1, single well and multi-well water pumping experiments, determining hydrogeological parameters of the surrounding areas of the polluted area, including:
s1.1, single-well and multi-well water pumping experiments: carrying out single-well water pumping, multi-well water pumping and cluster well interference water pumping tests, wherein the water pumping tests aim to find out the permeability of a water-bearing stratum, the size of water inflow, the buried motion characteristics of underground water and the hydraulic connection among the water-bearing strata; the single-well water pumping is characterized in that one main water pumping well 1 is used for pumping water, the multi-well water pumping is characterized in that one group of repair systems is used for pumping water, and the group well interference water pumping is characterized in that a plurality of groups of repair systems are used for pumping water;
s1.2, determining hydrogeological parameters of peripheral areas of the polluted area: determining hydrogeological parameters of an aquifer: permeability coefficient K, influence radius R; providing required hydrogeological data for water intake design: influence radius, single well water yield, unit water yield, interwell interference water yield and interference coefficient; monitoring the groundwater quality indexes of the pumping well and the monitoring well 2 for calculating the water yield of the groundwater aquifer around the tailing pond and providing a basis for a groundwater remediation scheme around the remediation zone;
in order to determine the heterogeneity of the aquifer in different directions or determine the radius of influence of pumping, two groups of monitoring wells 2 are arranged by taking a main pumping well 1 and an auxiliary pumping well 3 as centers according to different conditions of the aquifer to form two observation lines: one vertical underground water flow direction and one parallel underground water flow direction are used for measuring the heterogeneity of the aquifer in different directions or determining the pumping influence radius;
s2, determining an optimal interception area: tracking the diffusion range of underground water pollutants by using the single well and the monitoring well 2 which are arranged around the polluted area, and simultaneously determining the flow direction, the flow speed and the movement radius of the underground water around the polluted area so as to determine the optimal interception area;
s3, determining well drilling positions and quantities: a plurality of groups of repairing systems are laid around the pollution source in underground water of a pollution area, each group of repairing systems consists of a main pumping well 1 and an auxiliary pumping well 3, the main pumping well 1 is laid at the center of the pollution source and the pollution periphery, the auxiliary pumping well 3 is arranged on one side of the pollution source, and monitoring wells 2 are laid on two sides of the auxiliary pumping well 3 and the other side of the main pumping well 1 far away from the auxiliary pumping well 3;
s4, prevention, control and repair of groundwater pollution in the polluted area, comprising:
s4.1, through the matched pumping work of the main pumping well 1 and the auxiliary pumping well 3 in the surrounding zone of the polluted area, monitoring the water level and the water quality change by matching with the monitoring well 2, forming a surrounding zone low water level zone according to the requirements of observing the water level depth, the water inflow and the water level change, the observation frequency and precision and the requirement of restoring water level observation, and realizing underground water backflow;
the method specifically comprises the following steps: after the main pumping well 1 starts pumping water, the underground water level of the main pumping well 1 descends, the underground water around the main pumping well 1 starts to flow back to the main pumping well 1 by taking the main pumping well 1 as a center to form an underground water return funnel, the main pumping well 1 is the center of the funnel, and the auxiliary pumping well 3 performs auxiliary pumping on one side of a pollutant source to increase the negative pressure of the underground water and increase the backflow strength of the underground water on one side far away from the pollutant source;
specifically, as shown in fig. 2, before pumping, the groundwater level is at an original groundwater level 4, when pumping, the remediation system is laid on a rock layer 10 at the lower layer of the groundwater level, a main pumping well 1 pumps water upwards along a pumping direction 11 of the main pumping well, after pumping, the groundwater level acted by the main pumping well 1 is a water level 5 after pumping water by the main pumping well, and after forming a groundwater backflow funnel, the water level is a funnel-shaped water level line 6 formed after pumping water by the main pumping well, and the whole water flow direction flows back to the side of the main pumping well 1 along a flowing direction 7 of the pumped groundwater; in addition, when the auxiliary pumping well pumps water, the water is pumped upwards along the pumping direction 12 of the auxiliary pumping well, the groundwater level acting after the auxiliary pumping well pumps water is the groundwater level 8 after the auxiliary pumping well pumps water, and a funnel-shaped water level line 9 formed after the auxiliary pumping well pumps water is formed after the auxiliary pumping well pumps water;
s4.2, single-well water pumping and multi-well water pumping are utilized, the water yield and water level change of the water pumping wells are controlled, the combined prevention and control of underground water pollution are realized, and finally pumped water can be directly conveyed to a metal concentrating mill and the like for practical use.
Example 2
Taking a certain tailing pond as an example, the environmental monitoring data shows that the groundwater pollution of the local tailing pond is mainly concentrated on a submerged layer, so the submerged layer is mainly considered for groundwater pollution remediation. The hydrogeological characteristics of the underground water around the steeled tailing pond are implemented according with the 'well digging and intercepting' technology, the pollution of the underground water around the tailing pond can be subjected to exemplary repairing research, and the polluted underground water is extracted for mineral separation enterprises;
the concrete repairing steps are as follows:
(1) determination of hydrogeological parameters by pumping tests
Carrying out single-well water pumping, multi-well water pumping and cluster well interference water pumping tests, wherein the water pumping tests aim to find out the permeability of a water-bearing stratum, the size of water inflow, the buried motion characteristics of underground water and the hydraulic connection among the water-bearing strata;
determining hydrogeological parameters of an aquifer: the permeability coefficient K, the influence radius R and the like provide required hydrogeological data for water intake design, such as influence radius, single well water yield, unit water yield, interwell interference water yield, interference coefficient and the like, provide basis for calculating the water yield of underground water aquifers around the tailing pond and the underground water restoration scheme around the restoration zone, and monitor underground water quality indexes of the pumping well and the observation well;
in order to calculate hydrogeological parameters, 3 pumping wells are selected on one side of the pumping wells at the periphery of the tailing pond, and 3 observation wells are respectively arranged in the flow direction of vertical underground water. The group well interference pumping test is carried out on the surrounding belt, and 3 groups are established;
in order to determine the heterogeneity of different directions of the aquifer or determine the pumping influence radius, 2 observation lines are arranged by taking a pumping well as the center according to different conditions of the aquifer: one vertical groundwater flow direction and one parallel groundwater flow direction;
by observing the change of water quantity and water level, a water balance system for recycling the polluted underground water is established, the polluted underground water at different periods around the tailing pond is extracted, and the conventional indexes of the quality of the underground water are monitored.
(2) Tracking test for underground water pollutants around tailing pond
And tracking the diffusion range of underground water pollutants by using the single well and the observation well which are arranged around the tailing pond, and simultaneously determining the flow direction, the flow speed and the movement radius of the underground water around the tailing pond.
(3) Well digging interception repair of underground water pollution around tailing pond
The method is characterized in that a water level and water quality change of a pumping well and an observation well of the surrounding area of the tailing pond is utilized, a surrounding area surrounding low water level area is formed according to the observation water level depth, the water inflow and water level change, the observation frequency and precision requirement and the requirement of water level observation restoration, underground water backflow is realized, single-well pumping and multi-well pumping are utilized, the water outflow and water level change of the pumping well is controlled, and the combined prevention and control technology of underground water pollution is realized.
And finally: the above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that are within the spirit and principle of the present invention are intended to be included in the scope of the present invention.
Claims (9)
1. The utility model provides a system for repairing groundwater pollution that dams, its characterized in that of digging a well: use the pollution source of pollution area groundwater to encircle as the center and set up multiunit repair system, every group repair system all includes main pumping well and supplementary pumping well, supplementary pumping well sets up in source one side near the pollution source, supplementary pumping well both sides and main pumping well keep away from one side of supplementary pumping well all are equipped with the monitoring well.
2. The system for repairing groundwater pollution by well digging interception according to claim 1, wherein: the main pumping well and the auxiliary pumping well can be used as monitoring wells for monitoring water level, water flow direction and pollutant concentration.
3. A groundwater pollution remediation method using the system for remediating groundwater pollution stopped-up of a well as claimed in any one of claims 1 to 2, characterized in that: the concrete repairing steps are as follows:
s1, single well and multi-well water pumping experiments, determining hydrogeological parameters of the surrounding areas of the polluted area, including:
s1.1, single-well and multi-well water pumping experiments: carrying out single-well water pumping, multi-well water pumping and cluster well interference water pumping tests to find out the permeability of the aquifer, the size of water inflow, the underground water burial motion characteristics and the hydraulic connection between the aquifers;
s1.2, determining hydrogeological parameters of peripheral areas of the polluted area: determining hydrogeological parameters of an aquifer, providing required hydrogeological data for water intake design, and monitoring groundwater quality indexes of a pumping well and a monitoring well;
s2, determining an optimal interception area: tracking the diffusion range of underground water pollutants by using a single well and a monitoring well which are arranged around the polluted area, and determining the flow direction, the flow speed and the movement radius of the underground water around the polluted area so as to determine an optimal interception area;
s3, determining well drilling positions and quantities: a plurality of groups of repair systems are laid around the pollution source in the underground water of the pollution area, each group of repair systems consists of a main pumping well and an auxiliary pumping well, the main pumping well is laid at the center of the distance between the pollution source and the pollution periphery, the auxiliary pumping well is arranged on one side of the pollution source, and monitoring wells are laid on two sides of the auxiliary pumping well and the other side of the main pumping well far away from the auxiliary pumping well;
s4, prevention, control and repair of groundwater pollution in the polluted area, comprising:
s4.1, through the matched pumping work of the main pumping well and the auxiliary pumping well of the surrounding zone of the polluted area, monitoring the water level and the water quality change by matching with a monitoring well, forming a surrounding zone low water level zone according to the requirements of observing the water level depth reduction, the water inflow and the water level change, the observation frequency and precision and the requirement of restoring water level observation, and realizing underground water backflow;
and S4.2, pumping water by using a single well and pumping water by using multiple wells, controlling the water yield and water level change of the pumping wells, and realizing combined prevention and control of underground water pollution.
4. The method for repairing underground water pollution by well digging interception according to claim 3, is characterized in that: in the step S1, the single-well pumping specifically uses one main pumping well, the multi-well pumping specifically uses one group of repair systems to pump water, and the group-well interference pumping specifically uses multiple groups of repair systems to pump water.
5. The method for repairing underground water pollution by well digging interception according to claim 3, is characterized in that: in the step S1.2, the hydrogeological parameters of the aquifer are: permeability coefficient K, influence radius R.
6. The method for repairing underground water pollution by well digging interception according to claim 3, is characterized in that: in the step S1.2, the hydrogeological data specifically comprises an influence radius, single well water yield, unit water yield, interwell interference water yield and an interference coefficient.
7. The method for repairing underground water pollution by well digging interception according to claim 5, is characterized in that: according to the different conditions of aquifer to main pumped well and supplementary pumped well are the center, arrange two sets of monitoring wells, form two observation lines: one vertical underground water flow direction and one parallel underground water flow direction are used for measuring the heterogeneity of the aquifer in different directions or determining the pumping influence radius.
8. The method for repairing underground water pollution by well digging interception according to claim 3, is characterized in that: in the step S4.1, after the main pumping well starts pumping water, the groundwater level of the main pumping well descends, and the groundwater around the main pumping well starts to flow back to the main pumping well by taking the main pumping well as the center, so as to form a groundwater return funnel, wherein the main pumping well is the funnel center.
9. The method for repairing groundwater pollution by well digging interception according to claim 8, wherein the method comprises the following steps: and in the step S4.1, the auxiliary pumping well performs auxiliary pumping on one side of the pollutant source to increase the negative pressure of the underground water and increase the reflux intensity of the underground water far away from the pollutant source.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201911278945.9A CN110980830A (en) | 2019-12-13 | 2019-12-13 | Method for repairing underground water pollution by well digging and intercepting |
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| CN201911278945.9A CN110980830A (en) | 2019-12-13 | 2019-12-13 | Method for repairing underground water pollution by well digging and intercepting |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113833522A (en) * | 2021-08-20 | 2021-12-24 | 中国恩菲工程技术有限公司 | Method for collecting acid water of refuse dump |
| CN116377959A (en) * | 2023-06-05 | 2023-07-04 | 生态环境部南京环境科学研究所 | System and method for treating sandy soil landfill solid waste polluted river |
-
2019
- 2019-12-13 CN CN201911278945.9A patent/CN110980830A/en not_active Withdrawn
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113833522A (en) * | 2021-08-20 | 2021-12-24 | 中国恩菲工程技术有限公司 | Method for collecting acid water of refuse dump |
| CN113833522B (en) * | 2021-08-20 | 2023-08-11 | 中国恩菲工程技术有限公司 | Method for collecting acidic water in dumping site |
| CN116377959A (en) * | 2023-06-05 | 2023-07-04 | 生态环境部南京环境科学研究所 | System and method for treating sandy soil landfill solid waste polluted river |
| CN116377959B (en) * | 2023-06-05 | 2023-08-15 | 生态环境部南京环境科学研究所 | System and method for treating sandy soil landfill solid waste polluted river |
| US11959238B1 (en) | 2023-06-05 | 2024-04-16 | Nanjing Institute Of Environmental Sciences, Mee | Treatment system and method for sandy soil landfill solid waste polluted river channel |
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