Grouting filling method in irregular mined-out area

Abstract

The invention discloses a grouting and filling method in an irregular mined-out area. The grouting and filling method in the irregular mined-out area comprises the steps that firstly, a to-be-built building group is taken as a protected object, and the governance range of the mined-out area is determined according to boundary angles; secondly, a plurality of grouting and filling belts are arrangedin the governance range at intervals, and the grouting and filling belts are in annular or arc shapes; and thirdly, grouting is conducted on the positions of the grouting and filling belts through grouting devices, and the filling body formed by grouting and coal columns in the mined-out area commonly form a structural support. According to the grouting and filling method in the irregular mined-out area, the problems that in the prior art, in terms of the grouting and filling method in the irregular mined-out area, the governance cost is high, the potential danger that the coal column is instable and the ground sinks suddenly, and the sinking-reducing effect is difficult to ensure are effectively solved.

Description

technical field [0001] The invention relates to the technical field of mining, in particular to a grouting filling method for an irregular goaf. Background technique [0002] In the prior art, large-scale mining of coal mines in my country has a history of more than one hundred years. With the continuous development of coal mining technology and affected by the geological conditions of coal seams, coal mining methods in my country have experienced multiple development stages such as room-and-pillar method, strip method, short-wall method, and long-wall method. Methods include caving method, filling method and so on. Different coal mining methods are adopted for mines with different scales and different conditions. Large mines with good coal seam geological conditions usually adopt long-wall mining methods; mines with unstable geological conditions usually adopt short-wall and room-and-pillar mining methods. , forming irregular gobs and irregular residual coal pillars. [0...

AI Technical Summary

Problems solved by technology

[0012] In the embodiment of the present invention, a grouting filling method for irregular mined-out areas is provided to solve the problem of high treatment costs and the inability to eliminate sudden coal pillar instability and surface suddenness in the grouting filling methods for irregular mined-out areas in the prior art. The hidden danger of subsidence and the difficulty in guaranteeing the effect of subsidence

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