Structure under-covering gob area filling expansion bag and construction method

Abstract

The invention discloses a structure under-covering gob area filling expansion bag and a construction method, and relates to the technical field of structure under-covering gob area filling. The structure under-covering gob area filling expansion bag comprises a film filling expansion bag, wherein one end of the film filling expansion bag is provided with an opening; a filling pipeline device is arranged at the position of the opening; the filling pipeline device comprises a drilling inner sleeve A and a drilling inner sleeve B which is positioned in the drilling inner sleeve A; a cover plate A is arranged at the top of the drilling inner sleeve A; the two ends of the drilling inner sleeve B extend out of the drilling inner sleeve A; a filling pipeline is arranged in the drilling inner sleeve B; a grouting pipe which is communicated with the filling pipeline is arranged at the top of the filling pipeline. The structure under-covering gob area filling expansion bag and the construction method have the beneficial effects that the structure is simple; the basic bearing capacity of a building foundation can be improved quickly and obviously; the construction process is simple; the cost is low; the point location of the filling area is accurate.

Description

technical field [0001] The invention relates to the technical field of goaf filling in structures, and is particularly suitable for reinforcing and filling the goaf under existing buildings under the third-level mining of coal mines and the construction method. Background technique [0002] Many resource-based cities in my country that are dominated by coal mining are facing a series of economic and people's livelihood problems caused by coal mining subsidence. The lives of local people will be affected by coal mining subsidence at any time. Great difficulties, the most important safety of their lives and property are facing serious threats. [0003] In recent years, goaf treatment technology has developed rapidly. Many examples have shown the feasibility of the goaf management technology. As long as the goaf is treated according to the actual underground conditions and the corresponding reinforcement measures are combined with the housing structure, the surface land of the ...

AI Technical Summary

Problems solved by technology

Chinese patent CN201220141335.1 provides a multi-space filling string bag in the goaf of a mine. The filling bag is hung multiple times and the bag is divided into intervals for grouting. After the grouting slurry in the bag is solidified, a support column is formed, which can be applied to The goaf is filled in the mining face with advancing direction or small inclination of coal seam, but the bag grouting filling is still carried out inside the gob face, and it is still unable to effectively control the goaf under the existing buildings

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