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Hot-press type tunnel ventilating system for high altitude and high ground temperature long tunnel

A technology for tunnel ventilation and high ground temperature, which is applied in the ventilation of mines/tunnels, tunnels, mining equipment, etc. It can solve the problems that the ventilation volume cannot meet the cooling requirements, it is difficult to avoid personnel damage, and cannot be used, and the natural ventilation volume can be improved and avoided. Damage, the effect of raising the air temperature

Pending Publication Date: 2019-08-30
POWERCHINA CHENGDU ENG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, the ice cooling measures commonly used in plain areas are difficult to avoid personnel injuries during the construction of super-long tunnels with high altitude and high ground temperature. Therefore, the traditional ice cooling methods cannot be used in high altitude areas.
[0005] In addition, according to the traditional long tunnel construction ventilation method, the outdoor air is sent to the vicinity of the tunnel face through the air duct, and then exhausted to the outside through the tunnel. When the tunnel is long and the ground temperature is high, the air is completely supplied through the air duct. method, the air duct is too long, the cost is high, and the ventilation volume is far from meeting the cooling demand
[0006] To sum up, the current ventilation problem for the construction of super-long tunnels with high altitude and high ground temperature is an unsolved problem

Method used

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  • Hot-press type tunnel ventilating system for high altitude and high ground temperature long tunnel
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  • Hot-press type tunnel ventilating system for high altitude and high ground temperature long tunnel

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Embodiment 1

[0051] Refer to attached figure 1 And attached Figure 5 As shown, it is a schematic diagram of adopting the technical solution of the present invention under the drilling and blasting construction state.

[0052] Assume the following tunnel construction example:

[0053] The total length of a certain tunnel is 30000m.

[0054] The average elevation of the tunnel is 3500m, the atmospheric pressure is 500mm Hg, the annual average temperature is 6.5°C, and the average temperature in July is 14.6°C.

[0055] Drilling and blasting construction, the main body of the tunnel is divided into 8 sections, with a total of 16 working faces for construction, the longest section of which is 4,500m; the longest section of the tunnel in 7 plus a certain section is 7,000m.

[0056] There are two main tunnels in the main body of the tunnel, which are the first main tunnel 1 and the second main tunnel 2 respectively, and the main tunnels are excavated in parallel with the parallel pilot tunne...

Embodiment 2

[0108] Refer to attached figure 2 And attached Figure 6 As shown, it is a schematic diagram of adopting the technical solution of the present invention under the construction state of the TBM method.

[0109] Assume the following tunnel construction example:

[0110] A tunnel is 30000m long.

[0111] The average elevation of the tunnel is 3500m, the atmospheric pressure is 500mm Hg, the annual average temperature is 6.5°C, and the average temperature in July is 14.6°C.

[0112] TBM method construction, the main tunnel and the parallel pilot tunnel are divided into 2 sections, and a total of 2 working faces are used for construction. The excavation head is 15000m long.

[0113] There are two main tunnels, namely the first main tunnel 1 and the second main tunnel 2, and the main tunnel and the parallel pilot tunnel 3 are excavated in parallel. The diameter of the main tunnel is 10m, the circumference is 31.4m, and the cross-sectional area is 80m 2 ;15000m tunnel surface ...

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Abstract

The invention discloses a hot-press type tunnel ventilating system for a high altitude and high ground temperature long tunnel and belongs to the field of tunnel construction ventilation and providesthe hot-press type tunnel ventilating system for the high altitude and high ground temperature long tunnel. The system comprises a tunnel main body and a ventilating well. The ventilating well is of ashaft structure or of an inclined shaft structure; the tunnel main body comprises a communication and deslagging channel area, a working area and a non-staff pass area; the working area is located near a tunnel face; the communication and deslagging channel area communicates to the working area; the non-staff pass area communicates to the communication and deslagging channel area; the lower end of the ventilating shaft communicates to the non-staff pass area and the upper end of the ventilating shaft communicates outdoors. By means of a hot pressure in the tunnel, natural ventilation with a relatively large blast capacity is formed in the tunnel. The natural ventilation is by no means of external mechanical equipment, so that the project investment can be saved greatly, and meanwhile, theventilating blast capacity in the tunnel can be also improved effectively.

Description

technical field [0001] The invention relates to the field of tunnel construction ventilation, in particular to a hot-press tunnel ventilation system and method for long tunnels with high altitude and high ground temperature. Background technique [0002] At present, many super-long tunnels with high ground temperature have been constructed, and the cooling measures for super-long tunnels with high ground temperature are becoming more and more mature. Among them, water spray cooling and ice cooling are the two most commonly used and most effective measures. However, there are no examples of high-altitude and high-ground-temperature ultra-long tunnels being completed. Moreover, cooling measures that are well-established in plain areas cannot be used at high altitudes. [0003] During tunnel construction, excessive water vapor will hinder the breathing of construction workers and seriously threaten the health of construction workers. The boiling point of water in high-altitu...

Claims

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Application Information

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IPC IPC(8): E21F1/00E21D9/14
CPCE21F1/00E21D9/14
Inventor 田迅陈川侯彦硕孙文彬石敬贤兰茜王静泓乔琪
Owner POWERCHINA CHENGDU ENG
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