Mine goaf tailing-filled concrete enclosing wall

Abstract

The invention discloses a mine goaf tailing-filled concrete enclosing wall. The wall body (2) of the mine goaf concrete enclosing wall is a horizontally placed rock-socketed pear-shaped concrete structure. The large end of the wall body (2) faces to a mine goaf (10). The convex drum-shaped upper part of the large end of the wall body (2) runs through a small rock mass well (1). An upper drain pipe (4) and a lower drain pipe (4) are arranged in the wall body (2) and are respectively used as an upper part drain pipe and a lower part drain pipe. The inlet of the upper part drain pipe and the inlet of the lower part drain pipe are respectively provided with a perforated pipe (7). The outlet of the upper part drain pipe and the outlet of the lower part drain pipe are respectively provided with a gate valve (5). A layer of stainless steel wire mesh covers the external surface of the perforated pipe (7) at the inlet of the lower part drain pipe. A sandstone inverted filter body (6) with certain thickness is spread outside the stainless steel wire mesh. A layer of geotextiles covers the surface of the sandstone inverted filter body (6). The invention has the advantages that the wall can bear the pressure of water head above 300m, the water and sand leakage can be prevented, the tailing settlement water can be drained, the tailing pore water can be also drained, and the consolidation degree and the stability of the tailing-filled body in the mine goaf can be improved.

Description

technical field [0001] The invention relates to an underground closed wall, in particular to a concrete closed wall filled with tailing sand in a mine goaf. It is suitable for all kinds of mines to seal the tailings when filling the existing goaf with full tailings, realize the separation of sand and water, and timely remove the sedimentation water and pore water of the tailings. Background technique [0002] There are many horizontal roadways in the vertical direction in the goaf formed by the segmented open-field mining method. Before hydraulic filling these goafs, these horizontal roadways need to be sealed, that is, a closed retaining wall is built. [0003] In the full tailing sand filling of the goaf, a large amount of sand leakage occurs in the closed wall from time to time. If the cleaning method is used, there are great unsafe factors. Especially with the arrival of the rainy season, the groundwater level rises, and the possibility of large flow leakage will furthe...

AI Technical Summary

Problems solved by technology

This type of filter wall has low strength and cannot meet the water-sand filling requirements of large-scale goafs with large height differences and high pressures.

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