Method for treating gas on coal seam working face through hole-replacing-roadway combined drainage

Abstract

The invention belongs to the technical field of gas drainage treatment of fully mechanized coal mining faces, and particularly relates to a method for treating gas on a coal seam working face through hole-replacing-roadway combined drainage. The method comprises a ground large-diameter drill hole, a ground temporary gas drainage pump station system, an underground high-position directional drill hole and an underground temporary gas drainage system. According to the method for treating the gas on the coal seam working face through hole-replacing-roadway combined drainage, according to a gas drainage drill hole arrangement principle, ground large-diameter drill holes and underground high-position directional drill holes are constructed, the ground temporary gas drainage pump station system, a multi-element three-dimensional drainage working face and upper corner gas are matched, the problem of gas overrun is effectively solved, safe stoping is guaranteed, the roadway driving engineering amount is reduced. The goals of reducing cost and relieving working face connection are achieved. The method is of great significance to construction of ten-million-ton intelligent mines, and the practical effect is good.

Description

technical field [0001] The invention relates to the technical field of gas drainage and control in fully-mechanized caving working faces, in particular to a method for controlling gas in a coal seam working face through combined drainage of holes instead of lanes. Background technique [0002] As the first of the five major disasters in coal mines, gas seriously restricts mine safety production. In recent years, with the increase of coal mine mining depth and intensity, the gas content of coal mining face has gradually increased, and the phenomenon of gas gushing out in gobs has become increasingly significant. The main problem faced by enterprises. [0003] At present, my country's coal mining mainly adopts several ventilation methods such as "W", "U", "Z" and "Y", combined with technical means such as laying out bottom and high suction lanes, to solve the problem of the working face and its upper corner. Corner gas overrun problem. However, with the extension of the mine...

AI Technical Summary

Problems solved by technology

However, with the extension of the mine to the deep and the continuous increase of mining intensity, the problems existing in the construction of gas drainage roadways such as long excavation time, heavy workload, large capital investment, and obvious influence of geological structures have gradually emerged.

In addition, with the mining of the working face, the cracks in the roof and floor of the coal seam develop to form a fractured zone, and the pressure relief gas generated in the cracks migrates upwards along the cracked zone, forming gas enrichment in the upper corner and even exceeding the limit, which seriously affects the safe mining of the working face

Images