Rapid plugging method and construction method for water inrush channel of hidden collapse column

Abstract

The invention discloses a rapid plugging method and construction method for a water inrush channel of a hidden collapse column. The rapid plugging method comprises the following steps: 1, analyzing the position of the hidden collapse column, and selecting a ground position which is 500-600 m away from the horizontal distance of the hidden collapse column as a hole position; 2, determining a plugging target layer within the range of the hidden collapse column, and horizontally drilling a main hole along the plugging target layer, wherein H is the depth from the plugging target layer to a coal seam floor, m: T is a water inrush coefficient and is 0.06, and P is water inrush pressure, MPa; and 3, drilling in the horizontal direction after the main hole reaches the plugging target layer, when the main hole encounters the hidden collapse column, pouring aggregates to form a water blocking section framework, and grouting to reinforce the water blocking section framework to form a water blocking section. According to the method, the collapse column water inrush is quickly plugged by using the ground directional drill, a water guide channel is quickly cut off through pouring of the aggregates with different particle sizes and quantity-control and pressure-control grouting, the water blocking section is formed in the collapse column, a dynamic water source is changed into still water, and the purpose of quickly plugging the collapse column water inrush is achieved.

Description

technical field [0001] The invention belongs to the technical field of water inrush control in mines, and in particular relates to a rapid plugging method and a construction method for a water inrush channel of a concealed subsidence column. Background technique [0002] With the high-intensity mining of North China type coalfields, the shallow coal resources are gradually exhausted. In order to ensure the stable development of the national economy, most mine mining activities continue to extend to the depth. The hazards of confined water in Ordovician limestone are increasing day by day. If there is a hidden water-conducting structure in the floor, under the influence of mining disturbance, it will be used as a water-conducting channel to communicate with the coal mining face, and the water in the strong water-rich aquifer on the floor will be introduced into the working face, resulting in The karst subsidence column is a typical floor concealed water-conducting structure, wh...

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Problems solved by technology

[0005] The purpose of the present invention is to provide a fast plugging method and construction method for the water inrush channel of the concealed subsidence column, perform aggregate pouring and grouting reinforcement at a suitable position of the water guide channel, and block the water inrush source from entering the coal mining face , to solve the problems of low plugging efficiency and high construction cost existing in existing methods

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