A system for controlling the migration of heavy metal elements in goaf filling by using the principle of electrophoresis
A technology of metal elements and gobs, applied in water treatment parameter control, filling, magnetic/electric field water/sewage treatment, etc., can solve problems such as undiscovered treatment methods, achieve technical feasibility, simple construction method, and economy reasonable effect
Active Publication Date: 2019-06-04
CHINA UNIV OF MINING & TECH
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Problems solved by technology
At present, no effective treatment method has been found in the existing technology
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[0017] Implementation of the present invention will be further described below in conjunction with accompanying drawing:
[0018] Such as figure 1 As shown, since the opening of the cut hole, with the advancement of the coal mining face, screen pipes 3 with the same length as the coal mining face are gradually laid on the floor of the goaf every 10-40m in the parallel coal mining face. The surface of the screen pipe 3 is evenly spread over the seepage holes, and is wrapped with several layers of geotextiles, and the surrounding area of the screen pipe 3 is covered with sand and gravel.
[0019] Such as figure 1 , 2 As shown, a row of conductive plates 2 connected in series is arranged in the goaf every 5-20 m from the parallel coal mining face starting from the incision, and each row of conductive plates is equal to the length of the coal mining face. Each conductive plate is 1m high, 2m long, and 2cm wide, such as image 3 As shown, these conductive plates rely on sever...
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A system for controlling goaf filling body heavy metal element migration by means of electrophoresis principles, said system comprising a direct current power supply (1), conductive plates (2), filter tubes (3), a central pipeline (4), a water extraction pump (5), a water reservoir (6) and a water drainage pump (7). The conductive plates (2) are arranged at regular intervals in rows, which are equal in length to a coal mining face, in parallel with the coal mining face within a goaf, each two adjacent conductive plates (2) are connected to different poles of the direct current power supply (1), and the filter tubes (3) are arranged beneath the conductive plates (2) connected to the power supply negative pole. Heavy metal ions gather around the conductive plates (2) connected to the power supply negative pole under the effect of an electrical field, and the water extraction pump (5) is started so that contaminated water passes through the filter tubes (3) to be collected in the water reservoir (6) via the central pipeline and discharged to the ground via the water drainage pump (7) for treatment. The system effectively controls the migration of heavy metal ions in goaf surrounding rock, and reduces the contamination of groundwater environments by goaf coal gangue filling body heavy metal ions.
Description
technical field [0001] The invention relates to a migration management system for filling heavy metal elements in goafs of coal mines, in particular to a system for controlling the migration of heavy metal elements in goaf fillings by using the principle of electrophoresis. Background technique [0002] With the application and promotion of coal gangue filling coal mining technology, after coal gangue is filled into the goaf, after long-term leaching and soaking in mine water, the heavy metal ions contained in it are precipitated from the coal gangue, and a large amount of heavy metal ions are deposited in the mining area. The movement and migration of the surrounding rock in the empty area will have a certain impact on the groundwater environment. The current prior art has not yet found an effective governance method. Contents of the invention [0003] The purpose of the present invention is to make up for the gap in the treatment of environmental pollution caused by fil...
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IPC IPC(8): C02F1/48C02F101/20C02F103/10
CPCC02F1/48C02F2101/20C02F2103/10C02F2209/42E21F15/00
Inventor 黄艳利高华东张吉雄李俊孟韩震宋天奇孔国强王枫晚
Owner CHINA UNIV OF MINING & TECH