Retaining wall built on soft base and construction method of retaining wall

Abstract

The invention discloses a method for building a retaining wall on a soft base. The method comprises the steps that anchor rods are fixed to a side rock and a top rock in a construction area of the retaining wall, and the anchor rods are used for subsequently fixing the retaining wall; the soft base below the construction area of the retaining wall is dug to form a notch groove; baffles are arranged on the two sides of the notch groove, the baffles are oppositely arranged, the position of the retaining wall is reserved in the middle, covering materials are poured at the reserved retaining wallposition, and pouring is carried out layer by layer to form the retaining wall; after the covering materials at the retaining wall are solidified, the baffles are removed; the soft base outside a stope is excavated a distance, and the anchor rods are fixed to the soft base after the excavation; the covering materials are poured on the base outside the stope after the excavation to form a coveringlayer. According to the scheme, the soft base is firstly grooved, the retaining wall is built in the soft base, the structure of the retaining wall after building is stable, then the upper layer of the soft base is subjected to bottom replacing treatment, and filling slurry in an area to be filled cannot leak from the bottom of the soft base outside the stope.

Description

technical field [0001] The invention relates to the technical field of underground mining, in particular to a retaining wall built on a soft base and a construction method. Background technique [0002] At present, the country vigorously advocates the construction of green circular mines. In order to reduce the accumulation of waste rocks on the surface and control the ground pressure activities caused by mining, in underground metal mines, the method of subsequent filling is often used for goaf treatment. Before the goaf is processed, the lower part of the goaf needs to be blocked with a filling retaining wall, so as to control the flow of slurry and realize the safety and stability of the stope filling process. [0003] At present, retaining walls are mostly built in stable ore rock areas. Reasonable structural parameters of retaining walls can effectively ensure the safety and stability of filling, but when applied to soft foundations, a series of problems will arise. Ac...

AI Technical Summary

Problems solved by technology

According to the application of filling retaining wall at home and abroad, although the retaining wall has good stability, due to the action of slurry under the action of water head pressure, it acts on the weak area of ​​the structure, which easily weakens the soft base and forms a liquefaction zone, destroying the foundation below the retaining wall , forming a slurry channel, as the height of the filling slurry increases, the pressure of the slurry increases, and it is very likely that the slurry will leak in the later stage, seriously endangering the safety of downhole operations

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