CN-121990715-A - Water quality purification treatment method and system for coal mining subsidence area

CN121990715ACN 121990715 ACN121990715 ACN 121990715ACN-121990715-A

Abstract

The invention discloses a water quality purifying treatment method and a water quality purifying treatment system for a coal mining subsidence area, wherein the method comprises the steps of constructing a foundation bed and constructing an overflow type filtering ring dam; the method comprises the steps of communicating an overflow type filtering ring dam with all the depressions of a coal mining subsidence area, constructing an annular blocking dam, constructing a flow gathering area, constructing a sedimentation area, a water purifying area and a sewage area which are communicated with each other between the overflow type filtering ring dam and the annular blocking dam, communicating the sewage area with the flow gathering area, constructing a water purifying and discharging system in the sedimentation area, constructing a silt pumping system in the flow gathering area, pumping water from the water purifying area according to water level monitoring data, and periodically pumping silt and dosing. The system comprises a foundation bed, an overflow type filtering ring dam, an annular blocking dam, a purified water discharge system and a sludge pumping system. The invention can effectively solve the problems of weak pertinence, insufficient long-acting property and the like of the traditional treatment method, and has outstanding advantages in purification efficiency, pollution control, suitability and practicability. The invention is suitable for the technical field of water quality purification in coal mining subsidence areas.

Inventors

Dong Zhoubin
LIU KANG
BO HUAIZHI
HU SHAOHAO
Zhao Jiangshui
WANG YUEZONG
ZHANG FANGLONG
ZHANG YUEYUE

Assignees

山东省鲁南地质工程勘察院(山东省地质矿产勘查开发局第二地质大队)

Dates

Publication Date: 20260508
Application Date: 20260228

Claims (10)

1. The water quality purifying treatment method for the coal mining subsidence area is characterized by comprising the following steps of: step 1, constructing a foundation bed at the most depression of a coal mining subsidence area, and constructing an overflow type filtering ring dam at the center of the foundation bed; Step2, communicating the overflow type filtering ring dam with each depression part of the coal mining subsidence area, wherein the lowest point of the depression part is higher than the water inlet position of the overflow type filtering ring dam; step 3, constructing an annular blocking dam on the foundation bed, wherein the annular blocking dam and the overflow type filtering annular dam are coaxially arranged; Step 4, constructing a flow gathering area in the overflow type filtering ring dam, constructing a sedimentation area and a water purifying area which are mutually communicated between the overflow type filtering ring dam and the annular blocking dam, and forming a sewage area outside the annular blocking dam, wherein the sewage area is communicated with the flow gathering area through an overground channel or an underground channel; Step 5, constructing a purified water discharge system in the sedimentation zone, wherein the water pumping part of the purified water discharge system extends into the purified water zone; step 6, constructing a sludge pumping system in the flow gathering region, wherein a sludge pumping part of the sludge pumping system is arranged at the bottom of the sedimentation region and the bottom of the flow gathering region; step 7, monitoring the water level of the water purification area, and when the water level exceeds a preset height, pumping water in the water purification area through a water purification drainage system, and enabling the water level in the water purification area to reach a low level value; And 8, regularly pumping out the sludge settled at the bottoms of the settling zone and the flow gathering zone through a sludge pumping system, and regularly throwing chemical agents into the flow gathering zone and each depression part.
2. The method of water quality purification treatment for a coal mining subsidence area as set forth in claim 1, wherein a plurality of landscape dams are constructed on the foundation bed, the upper end of each of the landscape dams is located above the water surface, and each of the landscape dams is connected to an overflow type filtering ring dam and a corresponding depression, an above-ground passage is constructed in the landscape dam, and the above-ground passage is gradually communicated downwardly from the depression to the collecting region along the extending direction of the landscape dam.
3. The water quality purification treatment method for the coal mining subsidence area according to claim 2 is characterized in that a diversion port is formed in the landscape dam and located at the outer side of the annular blocking dam and communicated with an overground channel, protective guards are arranged on two sides of the upper end of the landscape dam, and a plurality of layers of filter screens are arranged at one end of the overground channel communicating depression part.
4. The water quality purification treatment system in a coal mining subsidence area is characterized in that the water quality purification treatment method in any one of claims 1-3 is used for treating sewage based on the water quality purification treatment system and comprises a foundation bed, an overflow type filtering ring dam, an annular blocking dam, a purified water discharge system and a silt pumping system, wherein the overflow type filtering ring dam and the annular blocking dam are coaxially arranged on the foundation bed from inside to outside, the upper end face of the foundation bed is gradually recessed downwards from outside to inside, the purified water discharge system is constructed between the overflow type filtering ring dam and the annular blocking dam, and the silt pumping system is communicated with the inside and the outside of the overflow type filtering ring dam.
5. The water purification treatment system for a coal mining subsidence area as set forth in claim 4, wherein the overflow type filtering ring dam comprises a ring dam body, a plurality of multi-stage filtering units are uniformly constructed in the circumferential direction of the ring dam body, and each multi-stage filtering unit comprises a protective layer, a primary filtering layer, a secondary filtering layer, a tertiary filtering layer and a permeable layer which are sequentially arranged from inside to outside.
6. The water purification treatment system for a coal mining subsidence area as recited in claim 4, wherein a plurality of self-floating froth collectors are uniformly installed on the overflow type filtering ring dam along a circumferential direction thereof, and each of the self-floating froth collectors is located at an upper inner side of the overflow type filtering ring dam.
7. The water quality purification treatment system for a coal mining subsidence area as set forth in claim 6 wherein the self-floating froth collector comprises two froth adsorption mechanisms symmetrically mounted on both sides of an assembly frame, wherein the two froth adsorption mechanisms are in transmission connection with an adjusting mechanism mounted on the assembly frame, a self-floating assembly is mounted on the assembly frame, the assembly frame is connected with a sliding block through an angle adjusting member, the sliding block is in sliding connection with a vertical guide rail, and the vertical guide rail is mounted on the inner wall of an overflow type filtering ring dam.
8. The water purification treatment system for a coal mining subsidence area as set forth in claim 7 wherein said froth adsorption means comprises a plurality of froth adsorption members disposed at intervals along the length direction of the assembly frame, each of said froth adsorption members being rotatably connected to the assembly frame by a transfer shaft fixedly connected to one end thereof, said adjustment means comprises a drive rack movably disposed on the assembly frame and extending along the length direction of the assembly frame, a drive gear coaxially disposed on each transfer shaft, said drive gear engaging with the drive rack, an adjustment screw rotatably connected to one end of the drive rack, said adjustment screw being threadably connected to the assembly frame.
9. The water purification treatment system for a coal mining subsidence area as set forth in claim 4, wherein the clean water discharge system comprises an annular discharge pipe coaxially arranged outside an overflow type filtering annular dam, a discharge main pipe is communicated with the annular discharge pipe and connected with a water suction pump, a plurality of vertical assembly pipes are arranged on the annular discharge pipe at intervals along the circumferential direction of the annular discharge pipe, and a self-floating water pump is movably inserted into the upper end of each vertical assembly pipe.
10. The water quality purification treatment system for a coal mining subsidence area according to claim 9, wherein the self-floating water pump comprises a vertical water suction pipe, the lower end of the vertical water suction pipe is movably inserted into the vertical water suction pipe from the upper end of the vertical water suction pipe, an installation seat is coaxially constructed at the upper end of the vertical water suction pipe, a first diversion channel communicated with the vertical water suction pipe is coaxially and detachably connected to the installation seat, a self-floating piece is coaxially and detachably connected to the installation seat, a water suction port is constructed at the lower end of the self-floating piece, the water suction port is immersed below a liquid level, a second diversion channel communicated with the water suction port is constructed in the self-floating piece, and the second diversion channel is communicated with the first diversion channel.

Description

Water quality purification treatment method and system for coal mining subsidence area Technical Field The invention belongs to the technical field of sewage treatment, and particularly relates to a water quality purifying treatment method and system for a coal mining subsidence area. Background The water pollution in the coal mining subsidence area is complicated due to pollution sources, and most of water bodies in the subsidence area are in a semi-closed state and have poor hydrodynamic force, so that the harm of the water bodies in the subsidence area can affect multiple dimensions such as ecology, human health and economic development. The ecological system breaks the stability of the water ecological system, the biodiversity is greatly reduced, the ecological function is lost, the health and the safety of human bodies are threatened, the drinking water source is polluted and is accumulated and endangered through a food chain, the regional economic development is hindered, the agriculture and the aquaculture are restricted, and the land and water resource utilization is influenced. The current treatment method has the problems of insufficient pertinence, high cost, lack of long-acting property and the like, and the problem of water pollution is difficult to solve fundamentally. By adopting the traditional pollution interception and isolation measures, namely, the part of the area is intercepted by arranging the isolation belt to intercept the surface pollutants from entering the subsidence water body, but the subsidence area generates additional gradient due to the subsidence of the surface, the surface runoff is easy to sink into the water accumulation area, and the surface source pollution is difficult to be blocked by the simple isolation measures. Moreover, the isolation facilities are washed by water flow for a long time, are easy to damage and lose efficacy, have high later maintenance pressure, and are difficult to realize the effect of continuously intercepting sewage. Disclosure of Invention The invention provides a water quality purifying treatment method and system for a coal mining subsidence area, which solve the problems of weak pertinence, insufficient long-acting performance and the like of the traditional treatment method through structural design and multi-system cooperation, and have outstanding advantages in purifying efficiency, pollution control, suitability and practicability. In order to achieve the above purpose, the technical scheme adopted by the invention is as follows: a water quality purification treatment method for a coal mining subsidence area comprises the following steps: step 1, constructing a foundation bed at the most depression of a coal mining subsidence area, and constructing an overflow type filtering ring dam at the center of the foundation bed; Step2, communicating the overflow type filtering ring dam with each depression part of the coal mining subsidence area, wherein the lowest point of the depression part is higher than the water inlet position of the overflow type filtering ring dam; step 3, constructing an annular blocking dam on the foundation bed, wherein the annular blocking dam and the overflow type filtering annular dam are coaxially arranged; Step 4, constructing a flow gathering area in the overflow type filtering ring dam, constructing a sedimentation area and a water purifying area which are mutually communicated between the overflow type filtering ring dam and the annular blocking dam, and forming a sewage area outside the annular blocking dam, wherein the sewage area is communicated with the flow gathering area through an overground channel or an underground channel; Step 5, constructing a purified water discharge system in the sedimentation zone, wherein the water pumping part of the purified water discharge system extends into the purified water zone; step 6, constructing a sludge pumping system in the flow gathering region, wherein a sludge pumping part of the sludge pumping system is arranged at the bottom of the sedimentation region and the bottom of the flow gathering region; step 7, monitoring the water level of the water purification area, and when the water level exceeds a preset height, pumping water in the water purification area through a water purification drainage system, and enabling the water level in the water purification area to reach a low level value; And 8, regularly pumping out the sludge settled at the bottoms of the settling zone and the flow gathering zone through a sludge pumping system, and regularly throwing chemical agents into the flow gathering zone and each depression part. Further, a plurality of landscape dams are constructed on the foundation bed, the upper end of each landscape dam is located above the water surface, each landscape dam is connected with an overflow type filtering ring dam and a corresponding depression part, an above-ground channel is constructed in the landscape dam, and the above-ground