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

A gas drainage and coal seam technology, which is applied in gas discharge, earthwork drilling, mining equipment, etc., can solve the problems of increasing the gas concentration in the construction environment, failing to effectively prevent gas, increasing energy consumption and equipment investment, etc. The effect of draining the number of drilling holes, solving the problem of rapid and safe coal excavation construction, and reducing construction safety risks

Inactive Publication Date: 2019-07-30
CHINA RAILWAY ERYUAN ENG GRP CO LTD
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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

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

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Embodiment Construction

[0021] The technical content of the present invention is: before the coal is unearthed in the tunnel, the drilling site is arranged outside the side wall of the flat guide hole (abbreviated as the horizontal guide) that is excavated ahead of the frontal hole, and the frontal holes are respectively set on the hole walls of the drilling site. Drainage site and level guide discharge site, a network of drill holes are arranged towards the front hole and the coal seam ahead of the level guide, and the holes drilled from the drill site to the front hole and the front coal seam of the level guide penetrate the entire thickness of the coal seam, and the pre-discharged coal seam is drained through the drill holes. Gas, to achieve the effect of gas section drainage in coal seams that have not been unloaded. Using the air negative pressure generated by the gas drainage pump, the coal seam gas that is not affected by mining is drained through boreholes and pipelines, and the gas in the coa...

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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...

Claims

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Application Information

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IPC IPC(8): E21F7/00
CPCE21F7/00
Inventor 匡亮赵万强喻渝张永平曹彧郑长青罗禄森刘恺何昌国谭永杰孙其清
Owner CHINA RAILWAY ERYUAN ENG GRP CO LTD
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