Rock cross-cut coal uncovering method based on controllable shock wave permeability improvement

Abstract

The invention relates to a coal mine technology, in particular to a rock cross-cut coal uncovering method based on controllable shock wave permeability improvement. The rock cross-cut coal uncovering method based on controllable shock wave permeability improvement solves the problems that in existing rock cross-cut coal uncovering, the number of outburst elimination drilling construction is too large, the cost is high, or the outburst elimination effect is not ideal, and potential safety hazards exist. The method comprises the following steps of 1), constructing a plurality of permeability improvement drill holes from a roadway to a coal seam to be exposed; 2), curing hole openings; 3), setting parameters; 4), mounting hole opening devices; 5), sending controllable shock wave generation equipment to an permeability improvement range; 6), closing the holes and injecting water; 7), starting operation; 8), after each operation point is completed, opening the hole and pumping back to the next operation point, closing the hole, and injecting water for continuous operation; 9), repeating the step (8), ending the operation after all operation points are treated, and connecting pipes to extract gas; and 10), repeating the steps (4) to (9), completing all drilling operations, and continuously tunneling the roadway until a coal seam is exposed after extraction reaches the standard.

Description

technical field [0001] The invention relates to coal mining technology, in particular to a method for uncovering coal in Shimen based on controllable shock wave anti-reflection. Background technique [0002] The process of gradually entering the coal seam by tunneling through the rock roadway underground is called exposing the coal seam or Shimen exposing the coal. In the process of unraveling coal in Shimen, because the coal seam usually has a large gas content and high pressure, it is easy to cause coal and gas outburst, and the outburst intensity is large and the impact range is wide. The damage caused is very serious, and may even bring devastating damage to the mine. disaster. Therefore, it is necessary to carry out outburst treatment on the target coal seam before unearthing the coal in Shimen, so that the gas pressure of the coal seam will drop below 0.74MPa, and the gas content per ton of coal will be 6-8m 3 Only then can the stone gate excavation and coal seam exp...

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to solve the technical problems of excessive outburst reduction drilling construction, long time, high cost, unsatisfactory outburst elimination effect and potential safety hazards in the existing Shimen coal mining, and to provide a controllable shock wave augmentation Thorough method of uncovering coal in Shimen

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