Pollution treatment method for underground water area

Abstract

The invention belongs to the technical field of underground water treatment methods, and discloses a pollution treatment method for an underground water area. The method is mainly characterized by comprising the following steps: firstly, calculating wells in the area; secondly, taking samples for laboratory test, and conforming water courses that underground water is available; thirdly, confirming to-be-treated wells; fourthly, treating the to-be-treated wells: cleaning sundries in the to-be-treated wells; measuring the to-be-treated wells so as to confirm positions of all well screens on the lowest water-containing sand course; conveying lead wires and explosive devices to the positions of all well screens on the lowest water-containing sand course in a well casing by virtue of ropes; injecting a paste-like blocking material into the wells; and finally, starting the explosive devices, exploding the well screens by virtue of the explosive devices, so that the exploded well screens fall into the wells, forming a lantern-shaped opening in the water filtering sand layer, and forming a blocking slurry layer at the inner layer of the water filtering sand layer as the paste-like blocking material in the well casing falls down under own gravity; and fifthly, in accordance with the fourth step, treating all to-be-treated wells. With the application of the method, underground water pollution can be effectively treated.

Description

technical field [0001] The invention belongs to the technical field of observation wells, and in particular relates to a method for controlling groundwater regional pollution. Background technique [0002] In the process of agricultural irrigation, drinking water source and industrial production, groundwater is generally exploited. As the water level of groundwater decreases, shallow water wells can no longer get water. In order to meet the needs of water, the depth of water wells is getting deeper and deeper. Shallow wells that cannot be filled with water are discarded. In order to prevent accidents such as falling wells, the abandoned shallow wells are sealed with end caps. [0003] The drilling steps of existing water wells are generally as follows: first drill the well hole with a drill pipe, and then hoist the well pipe. Ball packing is more troublesome. For shallow water wells, some water filter granules are generally filled, so that when rainwater or other surface w...

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Problems solved by technology

[0004] In addition, some chemical companies dig sewage seepage pits on the ground. Because the soil contains an anti-seepage clay layer, it is difficult for sewage to infiltrate. There are large pieces of filter water, and the sewage seeps into a layer of water-bearing sand layer through the large piece of material between the well wall and the well pipe, and penetrates into the well through the water filter flower tube of this layer, and the sewage flows downward along the inner wall of the well pipe In the next layer of water filter flower tube and water-bearing sand layer, vertical three-dimensional pollution is also formed, and the pollution is even greater

[0005] As the depth of well drilling deepens, if it cannot be well treated, more groundwater will be polluted. Since the groundwater pollution can hardly be recovered, it will cause serious damage to the future ecology.

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