Staircase mine waste reservoir drainage method

Abstract

The invention discloses a staircase mine waste reservoir drainage method; a staircase mine waste reservoir comprises three or more than three independent mine waste reservoirs which are sequentially distributed from top to bottom along the landform; the construction steps of the method are that: a flood detention dam is built on the staircase mine waste reservoir, a main drainage facility inlet isarranged nearby the flood detention dam; a main drainage facility is distributed on one shore side of the staircase mine waste reservoir, which has good geology and topographic conditions, and movesaround the staircase mine waste reservoir from one side and is extended into downstream; the three mine waste reservoirs at the upstream, midstream and downstream drain flood water respectively and adopt branch drainage systems which are respectively connected with the main drainage facility. The method has the advantages that: the drainage pressure in the mine waste reservoir is greatly reduced,the risk that the branch drainage systems are covered by mine waste load and are damaged owning to great pressure is reduced, thereby being beneficial to the safety and stability of the mine waste reservoir, realizing shunting of clean water and polluted water, being helpful of protecting environment and greatly improving the safety reliability of the whole staircase mine waste reservoir and the drainage systems.

Description

technical field [0001] The invention belongs to the technical field of mine safety and relates to a flood discharge method for a stepped tailings pond. Background technique [0002] The tailings pond is a combination of various structures that safely store the tailings produced after mine beneficiation. The safety and stability of the tailings pond mainly depends on two aspects: the first is the safety and stability of the tailings dam; the second is the safety and stability of the flood drainage system. According to statistics, disasters caused by flood discharge system failures in my country's non-ferrous metal mines account for almost 50% of the total tailing pond accidents. Therefore, it is very important for the safety and stability of the tailings pond to set up a scientific and reliable flood drainage system and safely and smoothly discharge the flood of the tailings pond. [0003] The mainstream type of tailings ponds in my country is the valley-type tailings pond,...

AI Technical Summary

Problems solved by technology

Each downstream reservoir bears the flood discharged by its upstream reservoir. The further downstream, the greater the flood discharge pressure layer by layer, which repeatedly increases the flood discharge load of each tailings reservoir, making the stepped tailings reservoir flood discharge Increased investment in systems engineering

[0006] 2. High risk of flood discharge

The flood drainage system of the stepped tailings pond is connected continuously. If the flood discharge pipe of any one of the ponds fails, it will affect the safe flood discharge of its own pond and other ponds, and the stepped tailings pond will be in great danger. status

[0007] 3. The safety and reliability of large cross-section flood discharge pipes are low

Due to the large load of tailings on the flood discharge pipe and poor construction quality, etc., the frequency of damage accidents to large-section flood discharge pipes is the highest among the flood discharge structures of non-ferrous metal mine tailings ponds, as high as 60%. Low security and reliability

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