Ground water pumping hole pumping drainage method for working face roof separation water damage

Abstract

The invention discloses a ground water pumping hole pumping drainage method for working face roof separation water damage. The method is mainly designed for the conditions that ultra-thick mudstone upward-pitching water draining hole construction cannot be achieved underground, and the ground through hole difficulty is too large. The method comprises the following steps of firstly, mastering the stratum condition, judging the development position of a separation layer and the development height of a water diversion fissure zone, forming a plurality of water pumping drill holes corresponding tothe ground from the central position of a working surface, vertically constructing the drill holes from top to bottom by virtue of a ground drilling machine every 200-300 meters, enabling a first-stage drill hole to penetrate through a perforated section loose bed, and beating to 10-20m below the bottom boundary of a bedrock layer; and drilling a thick-wall floral tube in the second level to thebottom of a stratum where a separation layer may develop by 10-20 meters, carrying out pumping drainage work of a pumping hole before the working face is pushed to be 100 meters away from the workingface, absorbing water in an aquifer and the separation layer through the thick-wall floral tube, and arranging a mining deep well submersible pump to drain the water, so that pumping drainage and closure of the separation layer space are achieved, and the problem of accumulated water of the separation layer of the working face roof is solved.

Description

technical field [0001] The invention belongs to the technical field of coal mining, and in particular relates to a method for pumping and draining water through ground water holes for working surface roof separation layer water damage. Background technique [0002] Coal resources are an important part of my country's national economy, but coal mine safety has been seriously affected by the five mine disasters of gas, coal dust, water, fire and roof disasters for many years. Especially with the deepening of mining depth, the problem of mine water hazards has become increasingly prominent . Affected by factors such as geological structural conditions, hydrogeological conditions, and random mining, the coal seam mining process in my country has become more complicated, especially when the roof is threatened by various water bodies, the problem of roof water is very prominent. These mine water hazards have caused huge economic losses and adverse social impacts, seriously threate...

AI Technical Summary

Problems solved by technology

Minor water inrush accidents will cause the water inrush working face to be shut down and stop production, and the cost of drainage will increase sharply. If it is serious, it will cause well flooding, endangering national property and people's lives.

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