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CN-121992808-A - Vertical relief well safety intelligent depressurization system of tailing pond dam

CN121992808ACN 121992808 ACN121992808 ACN 121992808ACN-121992808-A

Abstract

The invention provides a safe and intelligent depressurization system for a vertical depressurization well of a tailing pond dam, which is characterized in that a depressurization well system is arranged, when the pressure of water in the pond dam is increased under the action of vibration load or earthquake, and when the pressure of the water in the depressurization well exceeds a threshold value, a part of water enters the depressurization well. According to the invention, the layered seepage pipe is used for actively pumping water, so that the underground water is decompressed in a layered manner, and accidents caused by unstable liquefaction due to too high seepage lines of the tailing pond dam body are prevented. The technical scheme includes that the method comprises the steps of driving an outer seepage pipe into a tailing pond dam, arranging the lower end of the outer seepage pipe below a seepage line, opening a plurality of outer seepage holes in the outer seepage pipe, installing a water pressure sensor at the bottom of the outer seepage pipe, vertically arranging a plurality of seepage nets at intervals in the outer seepage pipe, installing a water pump below each seepage net and above the uppermost seepage net, and connecting the water pump to the outside of the seepage pipe through a drain pipe, wherein the water pump and a decompression sensor are connected in an electric cabinet arranged outside the seepage pipe.

Inventors

  • ZHANG XINGSHENG
  • LI DONGLIANG
  • LI QIANQIAN
  • LIU SHIPENG
  • ZHOU JIN
  • LI JIAHAO
  • ZHAO JING
  • ZHENG WENLONG
  • WANG SHAOKAI
  • ZHAO ZHIQIANG
  • SHEN HONGBIN
  • DONG JINYU
  • HAN LIWEI

Assignees

  • 华北水利水电大学

Dates

Publication Date
20260508
Application Date
20251014

Claims (10)

  1. 1. The utility model provides a vertical relief well safety intelligence depressurization system of tailing storehouse dam, includes outer infiltration pipe (1) of driving into on the tailing storehouse dam, infiltration pipe (1) lower extreme is arranged in below infiltration line (17), a serial communication port, it has a plurality of outer infiltration holes (2) to open on outer infiltration pipe (1), water pressure sensor (3) are installed to outer infiltration pipe (1) bottom, vertical interval arrangement has a plurality of infiltration nets (4) in outer infiltration pipe (1), and water pump (5) are all installed to infiltration net (4) below and the infiltration net (4) top of uppermost in every infiltration net (4), water pump (5) are outside to infiltration pipe intercommunication through drain pipe (6), and water pump (5) and decompression sensor connect in electric cabinet (18) of arranging outside the infiltration pipe.
  2. 2. The vertical relief well safe intelligent depressurization system of a tailing pond dam according to claim 1 is characterized in that at least one inner seepage pipe (7) is sequentially and coaxially arranged inside the outer seepage pipe (1) in a penetrating mode from outside to inside, a plurality of inner seepage holes (8) are formed in the inner seepage pipe (7), the water pump (5) is arranged in the inner seepage pipe (7) of the innermost layer, and the aperture of the outer seepage hole (2) is larger than that of the inner seepage hole (8).
  3. 3. The intelligent safety depressurization system for vertical relief wells of tailing pond dams according to claim 1 or 2, wherein geotextiles (9) and gauze (10) are sequentially wrapped outside the water seepage pipe.
  4. 4. A vertical relief well safety intelligent depressurization system for a tailing pond dam according to claim 3 is characterized in that a sliding groove (11) and a sliding rail (12) structure are arranged between two adjacent seepage pipes, so that the inner seepage pipe can be slid into the outer seepage pipe through the sliding rail (12) and the sliding groove (11) structure during installation.
  5. 5. The intelligent safety depressurization system for vertical depressurization wells of tailing pond dams according to claim 4 is characterized in that the sliding grooves (11) are formed by stepped grooves with small outside and large inside, and the shapes of the sliding rails (12) are matched with the sliding grooves (11).
  6. 6. The safe intelligent depressurization system for vertical relief wells of tailing pond dams according to claim 1, wherein the inner water seepage pipe is composed of vertical multi-section pipe bodies (15), lifting lugs (13) are installed on each section pipe body (15), two adjacent lifting lugs (13) are connected through a pull rope (14), and a pull rope (14) extending outwards from the water seepage pipe is fixed on the lifting lug (13) at the uppermost layer.
  7. 7. The intelligent safety depressurization system for vertical depressurization wells of tailing pond dams according to claim 6 is characterized in that two adjacent pipe bodies (15) are connected together through pipe connectors (16).
  8. 8. The intelligent safety depressurization system for vertical relief wells of tailing pond dams according to claim 1, wherein the outer water seepage holes (2) and the inner water seepage holes (8) are below a seepage line.
  9. 9. The vertical relief well safety intelligent depressurization system of the tailing pond dam according to claim 1 or 2, wherein the outer seepage pipe (1) is arranged on each level of dam body, and a plurality of outer seepage pipes (1) are arranged at intervals in the longitudinal direction of each level of dam body.
  10. 10. The intelligent safety depressurization system for vertical relief wells of tailing pond dams according to claim 2 is characterized in that the inner diameters of the multi-layer inner water seepage holes (8) are sequentially reduced from outside to inside.

Description

Vertical relief well safety intelligent depressurization system of tailing pond dam Technical Field The invention relates to the technical field of tailing pond safety, in particular to a safe and intelligent depressurization system for a vertical depressurization well of a tailing pond dam. Background Tailings are waste generated in the beneficiation process, contain mixtures of non-recoverable metals and different chemical costs, and tailings reservoirs are used for storing the discharged tailings. The Chinese is a mining large country, and the number of tailings ponds is arranged in the first province, namely, hebei, liaoning, yunnan, hunan, henan, inner Mongolia, jiangxi, shanxi and Gansu, and the sum of the tailings ponds of the provinces accounts for about 75% of the total national quantity. Within these provinces, the number of "overhead reservoirs" (tailings reservoirs with residents or significant facilities within 1 km distance downstream) is 1112. At present, a plurality of enterprises re-start and increase capacity of a tailing pond which is in small-medium or temporary shutdown and stop production, and engineering accidents are extremely easy to occur and dam break is even induced if the safety and stability of the tailing dam are not fully demonstrated. The infiltration line is a free water level line formed in the dam body when the water body in the reservoir area infiltrates in the downstream direction of the dam body. The infiltration line is a key element for the safety of the tailing pond, and the height of the infiltration line directly affects the stability of the dam body. Therefore, when the seepage stability of the tailing pond dam body is studied, the seepage line is one of indispensable influence factors, and is indispensable to the overall stability of the tailing pond dam. Guo Tingting, zhao Zhouneng, etc. published "analysis of disaster-causing mechanism and countermeasure of tailing pond accident in China" [ J ]. Chemical minerals and processing 2022,51 (04): 31-34. Analysis of disaster-causing mechanism of tailing pond accident in China is carried out, and the main influencing factors are infiltration damage, flood, dam body instability and earthquake disaster, wherein the influence caused by infiltration damage and earthquake disaster is the largest. Because the infiltration line is related to the water level in the dam body, when the earthquake happens, the pore water below the infiltration line is easy to form excessive void water pressure under the action of vibration load, thus being easy to cause the liquefaction of the sandy dam body, and if no control measures are taken, the dam body is induced to be unstable, and even serious dam break events are caused. Disclosure of Invention The invention aims to provide a safe and intelligent depressurization system for a vertical relief well of a tailing pond dam, which is characterized in that a relief well system is arranged, a water seepage pipe is layered, when an earthquake happens, overpressure pore water enters the relief well to raise the water level in the relief well due to the fact that the water pressure is raised, and when a water pressure detection device in the relief well exceeds a threshold value, a water pumping and draining device can be actively started to pump and reduce the water so as to perform layered depressurization on underground water, so that destabilization of a dam body due to the excess pore water pressure is prevented, and the accident rate is reduced. In order to achieve the above object, the present invention provides the following technical solutions: the utility model provides a vertical relief well safety intelligence depressurization system of tailing pond dam, includes and drives into the infiltration pipe on the tailing pond dam, infiltration pipe lower extreme is arranged in below the infiltration line, its characterized in that, it has a plurality of outer infiltration holes to open on the infiltration pipe, water pressure sensor is installed to the infiltration pipe bottom, vertical interval arrangement has a plurality of infiltration nets in the infiltration pipe, and the water pump is all installed to infiltration net below and the infiltration net top of uppermost, the water pump is outside the infiltration pipe through the drain pipe intercommunication, and water pump and decompression sensor connect in the electric cabinet of arranging outside the infiltration pipe. Preferably, the bottom of the external seepage pipe reaches the bottom of the dam body. Preferably, the inside of the outer water seepage pipe is sequentially and coaxially penetrated with at least one inner water seepage pipe from outside to inside, a plurality of inner water seepage holes are formed in the inner water seepage pipe, the water pump is arranged in the inner water seepage pipe of the innermost layer, and the aperture of the outer water seepage hole is larger than that of the inner water seepage hole. Pre