Method for building impermeable tailings dams with high scattered piles by waste rocks

Abstract

The invention relates to a method for building impermeable tailings dams with high scattered piles by waste rocks, comprising the following steps: analyzing the bearing capacity of tailings sands, designing double layers of reinforced concrete cutoff walls, manufacturing foundations for the double layers of reinforced concrete cutoff walls, constructing the bodies of the cutoff walls by a site casting method, dumping rocks at the two sides of the double layers of reinforced concrete cutoff walls and between the double layers of walls and building the impermeable tailings dams, wherein the cutoff walls are of double-layer reinforced concrete frame structure; each layer is 1.4-1.6m thick; a cross wall is arranged between the double layers of cutoff walls; large-diameter hole drilling is carried out on the section from the tailings sands to the bed rock, the holes penetrate into the bed rock and then construction is carried out by way of filling piles; the bulky rocks for the primary dam are conveyed and discharged by rubber belts and are rolled by bulldozers back and forth, then the rocks are dumped on the primary dam after rolling and then the rocks are rolled to form the embarkment; during dumping rocks, the machines climb upward to the elevation of 200-210m with the gradient of 6%; and the bulky rocks for the later dam are conveyed and discharged by automobiles. The method can increase the volume of the tailings reservoirs and lengthen the service lives of the tailings reservoirs.

Description

technical field [0001] The invention belongs to the technical field of tailings dams in metallurgical mines, and in particular relates to a method for constructing high bulk impermeable tailings dams by removing rocks. Background technique [0002] At present, many tailings ponds of metallurgical mines are at the end of their service life, that is to say, they are in the critical stage of closing or selecting a new location. The tailings pond is mainly responsible for the discharge of tailings from one or more concentrators, and its service life and production conditions have a major impact on mine production. With the continuous mining of iron mines, the amount of rock in the boundary is also increasing. The existing dump site of the mine will not be able to meet the requirements of rock discharge, and the volume of the dump site needs to be increased. Therefore, it is necessary to re-select the dump site. A large number of relocation and land acquisition problems will be ...

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a method for constructing a high bulk impermeable tailings dam by using discarded rocks, so as to increase the height of the tailings dam crest, solve the problem of insufficient volume of the existing mine dump, and prolong its service life

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