A method of pumping and draining ground water holes for roof detachment water damage on working face

Abstract

The invention discloses a ground water hole pumping method aimed at the water damage of the roof separation layer of the working face. The invention is mainly designed for the situation that it is impossible to realize the upward drainage hole construction of huge thick mudstone underground and the ground penetration hole is too difficult. This method should first grasp the stratum conditions, determine the development position of the separation layer and the development height of the water-conducting fissure zone, and open a number of pumping boreholes from the central position of the working face corresponding to the ground, and rely on the ground drilling rig to construct vertically from top to bottom every 200-300m Drilling, the first-level drilling passes through the loose layer of the opening section, and drills to 10-20m below the bottom boundary of the bedrock layer; the second-level drilling drills the thick-walled flower tube to the bottom of the stratum where separation layers may develop 10-20m, and drills in the working face Advance to 100m away from the working face to carry out the pumping and drainage work of the pumping hole, absorb the water in the aquifer and the separation layer through the thick-walled flower tube, and set up the mine deep well submersible pump to drain it, so as to realize the pumping and drainage of the separation layer space With the interception, the problem of water accumulation on the top plate of the working face is solved.

Description

technical field [0001] The invention belongs to the technical field of coal mining, and in particular relates to a ground water pumping hole pumping and discharging method for the water damage caused by the separation of layers of the working face roof. Background technique [0002] Coal resources are an important part of my country's national economy, but the safety of coal mines has been seriously affected by five major mine disasters such as gas, coal dust, water, fire and roof disasters for many years. Especially with the deepening of mining depth, the problem of mine water damage 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 roof water problem is very prominent. These mine water hazards cause huge economic losses and adverse social imp...

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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