Method of gas drainage for construction of tunnel and parallel adit passing through coal seamd

Abstract

The invention discloses a method of gas drainage for the construction of a tunnel and a parallel adit passing through coal seams, and relates to a tunnel engineering technology. The method comprises the following steps that (1) at least one parallel adit hole is formed in a main hole independently in the tunneling direction of the main hole; (2) holes are drilled in the direction of a coal seam inthe parallel adit holes in the step (1), parallel adit drainage holes and main hole drainage holes are formed, the parallel adit drainage holes are drilled to a coal seam in front of the parallel adit holes, and the main hole drainage holes are drilled to a coal seam in front of the main hole; and (3) gas is drained from the parallel adit drainage holes and the main hole drainage holes and is discharged out of the parallel adit holes. According to the method of gas drainage for the construction of the tunnel and the parallel adit passing through the coal seams, advanced gas drainage through the tunnel and the parallel adit passing through the coal seams is realized, the working procedure connection is compact, the operability is high, the drainage effect is reliable, and the requirementsof energy saving and environmental protection are met.

Description

technical field [0001] The invention relates to tunnel engineering technology, in particular to a gas drainage structure for the construction of a gas tunnel crossing a coal seam provided with an advanced flat guide. 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] Among the coal and gas outbursts, the outburst risk of Shimen unearthed coal is the highest, and the outburst intensity is also the highest. In particular, high-speed railway tunnels have large excavation sections, generally more than 140m2, and the outburs...

AI Technical Summary

Problems solved by technology

The above-mentioned measures and methods are passive to a certain extent, failing to discharge most of the gas directly outside the tunnel before the gas enters the construction environment, which increases the gas concentration in the construction environment, increases the ventilation time of the tunnel, and increases energy consumption and equipment. investment, and cannot effectively prevent and control gas outburst, which brings great potential safety hazards to the construction. A new tunnel and flat guide crossing coal seam gas drainage structure is needed to solve this problem, and has the advantages of convenient construction, safety, reliability, speed, and Economy and other characteristics, and meet the requirements of energy saving and environmental protection

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