Mine underground tailing water in-situ processing method and retaining wall capable of being filled by osmotic response

Abstract

The invention discloses a mine underground tailing water in-situ processing method and a retaining wall capable of being filled by osmotic response. When stoping is finished in a stope, before filling, a flexibly closed water filtering retaining wall is built at an access adit which needs to be sealed at the bottom of the stope; a retaining wall framework is formed by rock bolts and two layers ofreinforced steel nets in a welded mode; an inner layer reinforced steel net is bonded with a metal net; a water filtering material is arranged between the metal net and the reinforced steel net and covers the whole cross section of the access adit; bellow PRB reaction units with through holes are arranged between the two layers of the reinforced steel nets in vertical-parallel-arrangement mode; afunctional active filler is arranged in the bellow PRB reaction units in a filling mode; and the bellow PRB reaction units are fixed to the inner layer reinforced steel net. Jet concrete is arranged for filling the reinforced steel nets and forming a retaining wall with a certain thickness. The construction of the retaining wall body is convenient, under-stress performance is good, the water blocking and filtering effect is good, and operation and maintenance cost is low; an active reaction area is formed in the retaining wall, and pollutants in the tailing water can be caught and removed effectively; and underground water pollution is prevented.

Description

technical field [0001] The invention belongs to the technical field of filling and mining, and relates to an in-situ treatment method for mine tailings water and a permeable reaction filling retaining wall. Background technique [0002] With the development of the mining industry and the continuous improvement of safety and environmental protection requirements, the filling method, one of the main mining methods, is increasingly used in mines. Compared with the caving method and the open field method, although the filling method is relatively high in cost, relatively complex in process, and relatively low in production capacity, it has strong adaptability, low ore loss rate, low dilution rate, safe operation, and can effectively control the ground. pressure and land subsidence. At the same time, underground waste rock, surface waste slag and tailings are used as filling materials to fill the goaf, which saves the land stockpiled on the surface, reduces the occurrence of geo...

AI Technical Summary

Problems solved by technology

However, due to the high cost of harmless treatment of filling materials, the limited processing capacity cannot meet the requirements of underground filling volume, resulting in a sharp drop in filling efficiency. Domestic mines have not yet carried out targeted treatment either in the pretreatment of surface filling materials or in the filling process. Relevant reports on the treatment technology of toxic pollutants in filling bodies

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