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Tailings Reservoir Safety Evaluation and Management

Release date:2018-11-27  source:中南选矿网  Browse times:433
          (1) The classification of the safety of the tailings pond is mainly determined according to the flood control capacity of the tailings pond and the stability of the tailings dam body. The degree of safety is divided into dangerous libraries, dangerous warehouses, disease banks and normal libraries. (2) The tailings pond has one of the following conditions: Dangerous reservoir: The minimum safety super-high of the tailings dam and the minimum dry-shoal length of the tailings pond are not up to the design specifications, and the safety of the dam cannot be ensured; 2 The drainage system is severely blocked or collapsed, the drainage capacity or drainage capacity is drastically reduced, the drainage wells are significantly inclined, and there are signs of collapse; 3 the dam body shows signs of deep sliding; 4 other conditions that endanger the tailings pond. (3) The tailings pond has one of the following working conditions: the minimum safety super high of the tailings dam and the minimum dry beach length of the tailings pond are not up to the design specifications, but the safety of the dam is usually The impact is not great; 2 the drainage system is partially blocked or collapsed, the drainage capacity is reduced, and the design requirements are not met; 3 the dam body shows signs of shallow sliding; 4 the dam body has penetrating transverse cracks, and a large piping surge occurs. The water quality is turbid, the muddy sand or the seepage of the dam has a large extent to escape on the piled dam slope, and the soil and soil deformation occurs; 5 other conditions affecting the safe operation of the tailings pond. (4) The tailings pond has one of the following working conditions: the minimum safety and super high of the tailings dam and the minimum dry beach length of the tailings pond are not up to the design specifications; 2 the drainage system is cracked and deformed. Corrosion or wear, drain pipe joint leakage; 3 the overall slope slope ratio of the pile dam is steeper than the design specified value, or although it meets the design requirements, but the slope of the pile dam on some elevations is too steep, may form local instability; 4 Empirical calculation, the stability safety factor of the dam is less than the value specified in the design specification; 5 the position of the immersion line is too high, the osmotic water escapes from the high position, and the dam surface appears swamp; 6 dam body has more local longitudinal or transverse cracks; 7 dam There are small pipes in the body and a small amount of mud sand; 8 pile dams are severely washed out, forming more or larger gullies; 9 dam ends without intercepting ditch, hillside rain washes the dam shoulder; 10 other abnormal phenomena. (5) The normal working conditions for the following working conditions are as follows: the minimum safety super-high of the tailings dam and the minimum dry beach length of the tailings shoal meet the design requirements; 2 the structures of the drainage system meet the design requirements and the working conditions are normal; The contour size of the tailings dam meets the design requirements, the stability safety factor and the seepage control of the dam meet the requirements, and the working conditions are normal. (6) The enterprise must carry out the safety management work plan for the tailings pond safety assessment work, and conduct a safety evaluation of the tailings pond every five years by the qualified technical service agency. The safety evaluation report of the tailings pond must be reported to the provincial safety production supervision and management department for the record. Second, the safety management of the tailings pond (1) For dangerous reservoirs, enterprises must stop production and rescue, and take the following emergency measures: 1 immediately reduce the water level of the reservoir, ensure the safety of the dam and meet the minimum safety super high and minimum dry beach length requirements in flood season If necessary, the minimum dry beach length may be the width of the dam crest, and the sub-dam may be constructed by the channel trough method to form the required safety super-high and dry beach length; 2 dredge, reinforce or repair the drainage structure, and if necessary, open another Dig temporary drainage channels; 3 treat landslides and strengthen dams. (2) For the insurance store, the enterprise shall take the following measures to eliminate the dangerous situation before the limited time: 1 reduce the water level of the reservoir to ensure that the minimum safety super high and minimum dry beach length requirements are met; 2 dredge, reinforce or repair the drainage structure; Handle landslides, reinforce dams, and eliminate piping and fluids. (3) For the disease bank, the enterprise shall take the following measures to eliminate the hidden dangers of the accident as soon as possible: pay close attention to the flood control project to ensure that the amount of treatment is completely completed before the raft; strengthen and repair the drainage structure; reinforce the dam or properly cut the slope to treat the local crack; Implement precipitation measures to reduce the saturation line, eliminate piping and flowing soil; repair the dam slope and excavate the dam shoulder intercepting ditch. (4) The inspection period of the enterprise for the non-normal grade tailings pond: not less than 1 time per week for the “dangerous” grade tailings pond, and not less than 1 time for the “risk” grade tailings pond each month. The grade tailings pond is not less than one time per season. During the rainstorm and flood season, the number of inspections should be increased for the tailings pond according to the actual situation. If major hidden dangers are found during the inspection, measures must be taken immediately for rectification and report to the safety production supervision department.

 
 
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