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Laneway type ventilating technique for long and large tunnel

A long tunnel and roadway-type technology, which is applied in mine/tunnel ventilation, mining equipment, earthwork drilling and mining, etc. It can solve problems such as poor ventilation effect, high construction cost, and obstruction of construction, so as to save electricity and exhaust smoke The effect of shortening the time and speeding up the construction progress

Inactive Publication Date: 2008-07-23
THE 4TH ENG CO LTD OF CHINA RAILWAY 17TH BUREAU GRP
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AI Technical Summary

Problems solved by technology

[0010] In order to solve the problems of poor ventilation effect, high construction cost and hindering construction in the ventilation technology of long tunnels in the prior art, the present invention provides a roadway ventilation technology of long tunnels

Method used

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  • Laneway type ventilating technique for long and large tunnel
  • Laneway type ventilating technique for long and large tunnel

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Embodiment Construction

[0027] The examples are used to illustrate the invention, but not to restrict it in any way.

[0028] Take the applicant's construction of the North Tianshan Tunnel as an example:

[0029] 1. Project situation

[0030] The North Tianshan Tunnel is the main cross-ridge tunnel of the North Tianshan Mountains. It is located in the Zhongshan District in the western section of the North Tianshan Mountains. The mountain system is the Boluokonu Mountain. It is the watershed between the Ili Basin and the Zhungeer Basin. The elevation of Yueling Pass is 2780m, and the relative elevation difference is 500~1200m. The tunnel entrance and exit elevations are 1743.10m and 1600.93m respectively. The maximum buried depth of the tunnel is about 1038m.

[0031] The applicant constructs 6,850 meters and 6770 meters of the tunnel at the exit of the North Tianshan Tunnel, and the maximum buried depth of the tunnel is 1038 meters. The tunnel is used for single-head excavation, and ballasting is used in...

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Abstract

The invention relates to a long tunnel gallery ventilation technique, solving the problems that poor ventilation performance, high construction cost and hindering construction of the prior art, belonging to the field of tunnel construction technique, which is characterized in that an exhaust fan is arranged in the main tunnel to pump the foul air; the flat tunnel mouth has no plugging obstacle, and a plurality of blowers are arrange at the position having fresh air entering from the flat tunnel mouth; the blower transfers fresh air to different working positions via a blowing ventilator. The long tunnel gallery ventilation technique has the advantages that: 1. saving the length of laying air duct, in particular to long tunnel with considerable amount of ducts; 2. using low power jet blower instead the main blower to save electricity; 3. speeding up the discharge of the foul air, having good visible condition and enough oxygen content; 4. the smoke of working position is exhausted in short time which speeds up the construction; 5. the flat tunnel has no air dampers which realizes no obstacle plugging and the improvement of the traffic environment.

Description

Technical field [0001] The invention belongs to the technical field of tunnel construction, and specifically relates to a long and large tunnel tunnel type ventilation technology. Background technique [0002] In order to speed up the construction progress, long and large tunnels are usually designed with parallel pilot pits on the side of the main tunnel, referred to as horizontal pilot. The flat guide has a smaller cross-section than the normal hole, and the excavation speed is faster, so that the flat guide can move forward at a relatively fast speed. When the horizontal guide exceeds a certain distance from the working face of the main tunnel, it can enter the main tunnel for construction through the excavation of the transverse channel, increasing the construction work surface of the main tunnel and speeding up the construction of the main tunnel. Generally, the flat guide starts first, and the Zhengdong starts about 2 months later, or it can start at the same time. [0003]...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21F1/00E21F1/08
Inventor 李永红曹国平陈鉴恩张小花
Owner THE 4TH ENG CO LTD OF CHINA RAILWAY 17TH BUREAU GRP
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