Drainage well for sunken pit bottom of inner dumping site and drainage method of drainage well

Abstract

The invention discloses a drainage well for a sunken pit bottom of an inner dumping site and a drainage method of the drainage well, and belongs to the field of mineral engineering. The sunken pit bottom comprises a backfill body layer, a large water filtering layer, water-permeable geotextile and a waste rock layer which are sequentially arranged from bottom to top, wherein the drainage well is vertically arranged at the backfill body layer, a water outlet of the drainage well is located outside the waste rock layer, the sunken pit bottom further comprises a drainage pipe, the water inlet end of the drainage pipe communicates with a water outlet of the drainage well, and the water outlet end of the drainage pipe extends out of the side slope of a waste dump. According to the drainage well, by reasonably treating the pit bottom, an artificial permeable layer is formed, the drainage well is arranged in the treated pit bottom by adopting the drainage well with a complete well structure, the drainage pipeline is arranged in an inclined shaft manner, and finally gushing water at the bottom of the sunken pit is drained out of the inner dumping site; and the drainage well can reduce the work amount of pit bottom treatment of the inner dumping site, save investment and reduce the pit bottom treatment time.

Description

technical field [0001] The invention relates to the field of mining engineering, and more specifically relates to a draining well at the bottom of an inner dump pit and a draining method thereof. Background technique [0002] Ejection using the mined space is called internal drainage. Generally speaking, mines use the space in the existing stope that has reached the final stage of design, without affecting the existing mining system, and discard the stripped materials in the nearest stope, thus forming an internal dump. [0003] With the backfilling of the internal stripped material, the slope steps of the inner dump site will gradually rise, resulting in the long-term accumulation of atmospheric precipitation and the surrounding underground aquifer at the base. At the same time, the higher slope steps will block Atmospheric precipitation and the leakage of water gushing from the surrounding underground aquifer, etc., caused the gushing water to seep into the inner dump, wh...

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Problems solved by technology

[0008] In view of the large amount of engineering work on the bottom of the depression pit, which leads to a long construction period, large investment or poor drainage effect, the present invention designs a drainage well and its drying method for the bottom of the depression pit in the inner dump site. Reasonably treat the bottom of the depression to form an artificial water-permeable layer, arrange drainage wells in the treated bottom of the pit, and use inclined wells to lay out drainage lines, and finally drain the water gushing from the bottom of the depression to the outside of the inner dump site, thereby It can effectively solve the problem of water gushing in the dump, the drainage effect is better, and it can effectively reduce the amount of engineering work for the pit bottom of the internal dump, saving investment and reducing the time for pit bottom treatment

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