Ventilation and dustproof method used for tunnel construction

A technology for tunnel construction and air ducts, which is applied to mine/tunnel ventilation, dust prevention, and earth-moving drilling and mining, etc., can solve the problems of complex ventilation systems and difficult management, achieve good economic benefits, reduce noise pollution, and strengthen The effect of ventilation

Inactive Publication Date: 2019-07-02
THE 2ND ENG CO LTD OF CHINA RAILWAY 17 BUREAU GRP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The construction ventilation system has large-volume and high-power fans, large-diameter and long-distance ventilation pipes, and the ventilation system is complex and difficult to manage

Method used

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  • Ventilation and dustproof method used for tunnel construction
  • Ventilation and dustproof method used for tunnel construction
  • Ventilation and dustproof method used for tunnel construction

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0052] Please refer to Figure 1-5 As shown, a ventilation and dust prevention method for tunnel construction includes the following steps: Step 1: the first working face 1 excavated in the horizontal guide 101, the second working face 2 excavated in the main tunnel 201, and the inclined shaft 301 Air ducts are installed in front of the excavated third working face 3, and fans and air ducts are installed outside the horizontal guideway 101, the main tunnel 201 and the inclined shaft 301. The hole 201 is connected, and during the excavation process, the air duct moves forward with each working face; Step 2: After the main hole 201 is connected with the first cross passage 102, the fan is arranged at the intersection of the main hole 201 and the first cross passage 102 , the air ducts are respectively arranged to the second working face 2 excavated in the main hole 201 and the first working face 1 of the flat guide 101, and the jet fan 7 is set in the flat guide 101 hole to guid...

Embodiment 2

[0059] Please refer to Figure 1-5 As shown, the difference between this embodiment and Embodiment 1 is that this embodiment designs step 1 in detail, so that the ventilation method of step 1 in Embodiment 1 can be better realized.

[0060] In an embodiment, Step 1 includes the following steps:

[0061] Step 1.1: Install fans on the horizontal guide 101, one end of the main tunnel 201 and outside the inclined shaft 301, and connect the air ducts to the first working surface 1, the second working surface 2 and the third working surface 3 that need to be excavated;

[0062] Step 1.2: Excavate the flat guide 101 forward, and excavate the first cross channel 102 to the main hole 201 until it communicates with the main hole 201, and set two air ducts on the flat guide 101 to lead to the inside of the flat guide 101 and the first channel respectively. The intersection of the cross passage 102 and the main tunnel 201 is excavated to the other end of the main tunnel 201, and the air ...

Embodiment 3

[0072] Please refer to Figure 1-5 As shown, the difference between this embodiment and Embodiment 2 is that this embodiment has carried out a detailed optimization design on how to install the fan in the main hole 201, so as to achieve a better ventilation effect.

[0073] In this embodiment, step 2 includes the following steps:

[0074] Step 2.1: After the main hole 201 is connected with the first cross passage 102, the fan moves to the vicinity of the intersection of the main hole 201 and the first cross passage 102, and moves to the first working surface 1 and the main hole 201 respectively advancing to the flat guide 101. Air ducts are arranged on the second working surface 2 and the second cross passage 102 and the fifth working surface 5;

[0075] Step 2.2: Excavate the horizontal guide 101 to the main hole 201 to form the second cross passage 102. After the second cross passage 102 connects with the main hole 201, turn to the other end of the main hole 201 for excavat...

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Abstract

The invention provides a ventilation and dustproof method used for tunnel construction. The ventilation and dustproof method comprises the following steps that 1, air ducts are arranged at the front of excavation working faces of a flat pilot tunnel, a main hole, and an inclined shaft and move forward with moving forward of each working face; 2, after the main hole is connected with a first transverse passage, a draught fan is arranged at the intersection of the main hole and the first transverse passage, the air ducts are respectively arranged on the second working face and the first workingface of excavation, and a jet flow draught fan is arranged in the flat pilot tunnel to induce airflow to a tunnel opening; and excavation is conducted to the two sides of the main hole after the inclined shaft communicates the main hole; and 3, two transverse passages nearest to the second working face are reserved between the main hole and the flat pilot tunnel, and the draught fan moves with excavation of the main hole to the intersection of the NTH transverse passage and the main hole. According to the ventilation and dustproof method, the air ducts and draught fans are arranged on the fiveworking faces of tunnel construction and excavation for ventilation and circulation, the position is adjusted and a line is laid according to the construction steps by using the air ducts and the draught fans, air duct direction turning and tapoff of the multiple air ducts in a tunnel with the complex structure are realized, and the loss of wind power is greatly reduced.

Description

technical field [0001] The invention relates to the field of tunnel construction, in particular to a ventilation and dust prevention method for tunnel construction. Background technique [0002] Some tunnels are located in national nature reserves, and the dust discharged from tunnel construction will pollute the living environment of animals and plants around the tunnels. Ventilation and dust prevention during construction is a difficult point in construction ventilation. [0003] The structure of the tunnel is complex, the inclined shaft of the extra-long tunnel is long, and it is also responsible for the construction task of the main tunnel; the horizontal guide is connected with the exit of the Daqinling Tunnel by multiple cross passages (permanent, construction, drainage), and the ventilation design and management are difficult. [0004] The construction ventilation system has large-volume and high-power fans, large-diameter and long-distance ventilation pipes, and the ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21F1/00E21F1/04E21F1/08E21F5/14
CPCE21F1/006E21F1/04E21F1/08E21F5/143
Inventor 王俊平张翠芹
Owner THE 2ND ENG CO LTD OF CHINA RAILWAY 17 BUREAU GRP
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