Fengshuigou tailings dam
Tailings dam includes initial dam and later accumulation dam. For example, we often use upstream stacking in Sichuan. The initial dam was built in the early stage, and the late accumulation dam was gradually formed after the reservoir was completed and put into operation.
The construction technology of the initial dam mainly depends on what kind of dam it is. At present, the rockfill dam is better, because it is conducive to water seepage, and the upstream surface of the dam should be covered with a filter layer and non-woven fabric (to prevent the leakage of fine tailings). The gravity and porosity of rockfill dam depend on the design ~ ~ If it is designed, corresponding calculation must be made (seepage failure must be ensured, etc.). ).
How to build a dam in the later stage mainly depends on the design. If you are a designer, you should determine the slope ratio according to the nature and stability analysis of tailings. Generally speaking, the later dam height is determined by flood regulation calculus, and the dam slope ratio is determined by stability review (of course, the slope ratio here refers to the average slope ratio of the dam. If the stability is not enough, it can be solved by adjusting the track width). If it is a construction company, just follow the design requirements. Some sub-dams are formed by hydraulic impact, and some tailings are too fine to meet the needs of impact dam construction, so find another suitable soil to build.