Complex structure outburst coal seam main tunnel and parallel adit gas combined pumping drainage outburst elimination method

Abstract

The invention discloses a complex structure outburst coal seam main tunnel and parallel adit gas combined pumping drainage outburst elimination method. The outburst elimination method comprises the following steps: S1, holes are drilled in advance to penetrate all coal seams, the positions and distribution characteristics of the coal seams are found out, and the coal seams in a main tunnel and parallel adit structure range are taken as a whole to be included in a combined pumping drainage range; S2, a main tunnel pumping drainage working tunnel and a parallel adit pumping drainage working tunnel are formed, and branch tunnels are additionally arranged in the side direction of the parallel adit to serve as transverse channels; S3, combined pumping drainage is conducted on the main tunnel and the parallel adit, and pumping drainage holes are formed in the coal seams in the anticline range of the main tunnel and the parallel adit correspondingly; S4, a set of pumping drainage system is arranged, the gas in the coal seam range enters the pumping drainage system through the pumping drainage holes, and the gas is discharged after being subjected to innocent treatment; S5, combined pumping drainage effect inspection is conducted; and S6, a transverse channel is blocked, and regional verification and subsequent procedures are conducted on the main tunnel and the parallel adit correspondingly. According to the method, the gas drainage outburst elimination effect is improved, the construction difficulty of a traditional pumping drainage drill hole is reduced, construction is convenient, safety, reliability and economy are achieved, and the pumping drainage effect is good.

Description

technical field [0001] The invention relates to the technical field of coal mining and outburst prevention in tunnels, in particular to a method for combined pumping and outburst elimination of front tunnels in outburst coal seams with complex structures and flat guide gas. Background technique [0002] Coal and gas outburst is a serious natural disaster during the excavation process of coal mines and tunnel engineering. When it occurs, it can destroy shaft facilities and mine ventilation systems, causing coal rocks and gas to gushe out in large quantities, impacting and injuring people, and coal flow burying people , The gas caused suffocation, and even caused serious gas and coal dust explosions, resulting in production interruption, casualties and other huge losses. [0003] The Yaoziyan Tunnel of the newly built Chongqing Railway Hub East Ring Project is a high-risk tunnel with Class I risk management. The tunnel crosses the Zhongliangshan Mountains and is located in th...

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Problems solved by technology

[0006] Aiming at the technical problems existing at present, the present invention provides a method for combined drainage and outburst elimination of complex structure outburst coal seam front tunnel and flat guide gas to solve the problems in the prior art

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