Method for improving stability of permanent gas extraction system of outburst mine

Abstract

The invention discloses a method for improving the stability of a permanent gas extraction system of an outburst mine. The method comprises a solution to water accumulation in a pipeline of the permanent gas extraction system, a solution to hole collapse occurring when drilling is carried out on a low-permeability soft coal seam, a solution to blockage of an extraction pipe due to excessive slurry, and a solution to gas leakage and abnormal negative pressure of the pipeline of the extraction system. By means of the method, the probability of water accumulation of the pipeline is reduced, and the extraction effect is improved; moreover, the phenomena of gas emission and hole collapse can be effectively avoided, and the situation that the gas cannot be extracted due to the fact that the extraction pipe is blocked by slightly excessive slurry is avoided; the stability and integrity of the permanent gas extraction system of the outburst mine are improved.

Description

technical field [0001] The invention belongs to the field of mine gas prevention and control, in particular to a method for improving the stability of a permanent gas drainage system in an outburst mine. technical background [0002] Gas prevention and control plays a pivotal role in coal mine safety production, and gas drainage is the top priority in gas prevention and control work. Establishing a mine permanent gas drainage system is the primary prerequisite for outburst mines for coal seam mining, and maintaining its stability and integrity is a key task in gas drainage management. Practice has found that the existing permanent gas drainage systems generally exist as follows Defects: Water accumulation in the drainage pipeline is often caused by water collection in the borehole; the drainage drilling hole is blocked after sealing due to the soft coal seam and collapse; the drainage pipe is blocked by a slight excess of slurry , and the pipeline maintenance of the drainag...

AI Technical Summary

Problems solved by technology

Establishing a mine permanent gas drainage system is the primary prerequisite for outburst mines for coal seam mining, and maintaining its stability and integrity is a key task in gas drainage management. Practice has found that the existing permanent gas drainage systems generally exist as follows Defects: Water accumulation in the drainage pipeline is often caused by water collection in the borehole; the drainage drilling hole is blocked after sealing due to the soft and collapsed coal seam; the drainage pipe is blocked by a slight excess of slurry , and the pipeline maintenance of the drainage system is not in place, and there are many phenomena of gas leakage and negative pressure abnormalities, which lead to the inability of the permanent gas drainage system to extract gas stably for a long time, resulting in poor safety of the coal mine. The maintenance of the permanent gas drainage system high cost

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