Ventilation method of inclined shaft assisted double-hole construction

A ventilation method and ventilation method technology, which is applied in mine/tunnel ventilation, earthwork drilling, mining equipment, etc., to achieve the effects of low efficiency, saving air ducts, and saving electricity

Active Publication Date: 2016-01-13
CHINA RAILWAY TUNNEL GROUP CO LTD +2
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  • Abstract
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  • Claims
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AI Technical Summary

Problems solved by technology

However, for the ventilation in the construction of the inclined shaft auxiliary double main tunnel, due to the different construction environments and construction conditions at each stage, the adoption of simple pipeline ventilation and simple roadway ventilation will be limited, and there are deficiencies and unreasonable places.

Method used

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  • Ventilation method of inclined shaft assisted double-hole construction
  • Ventilation method of inclined shaft assisted double-hole construction
  • Ventilation method of inclined shaft assisted double-hole construction

Examples

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Embodiment 1

[0031] This example takes Uzbekistan's Angren-Pop railway as an example of the 1# inclined shaft of Kurami Tunnel. The design speed of the Angren-Pop railway is 40km / h. The length of the main tunnel is 19.3km. At the same time, a safety tunnel (19.3km long) is built parallel to the main tunnel. The center distance between the main tunnel and the safety tunnel is 29m. The main tunnel and the safety tunnel are connected by a communication channel, and the distance between the communication channel is 300m. The tunnel must be completed on September 1, 2016. In order to meet the requirements of the construction period, three inclined shafts are set up to assist the construction. The tunnel must be completed on September 1, 2016. In order to meet the requirements of the construction period, three inclined shafts are set up to assist the construction. The main tunnel construction tasks of each auxiliary inclined shaft are shown in Table 1-1 and figure 1 shown.

[0032] Table 1-1 ...

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Abstract

The invention specifically relates to a ventilation method of inclined shaft assisted double-hole construction. The ventilation method comprises the following steps: A, analyzing a pollution source and determining a ventilation standard; B, designing a ventilation system; and C, calculating tunnel ventilation parameters, selecting a fan and implementing a scheme; the ventilation system in the step B is specifically as follows: an axial-flow fan is arranged at an outer hole of an inclined shaft at an inclined shaft construction phase and a phase when inclined shaft construction is completed and a tunnel portal does not communicate with the inclined shaft, and a heading-face forced ventilation pattern is adopted with an air duct extending into a working face for ventilation; at a phase when the tunnel portal communicates with the inclined shaft, the tunnel portal is communicated with the inclined shaft and a jet flow gallery ventilation pattern is adopted, and a secure tunnel and a main tunnel both serve as air intake channels, while the inclined shaft serves as an exhaust channel. The ventilation method in the inclined shaft assisted double-track construction solves a long-distance problem that single forced ventilation fails in solving, and is high in ventilation efficiency and good in effect; moreover, the ventilation time is shortened and the construction efficiency is improved, and both electricity and air ducts can be saved; in addition, maintenance is convenient.

Description

technical field [0001] The invention relates to tunnel construction ventilation technology, in particular to a ventilation method for inclined shaft auxiliary double-hole construction. Background technique [0002] With the development of the national economy, the number of long tunnels in railway construction is increasing day by day. Drilling and explosive excavation is still widely used in tunnel construction. Due to the large excavation section and the increasing degree of construction mechanization, the deterioration of the working environment in the tunnel caused by the harmful gas generated after blasting and during the operation of internal combustion machinery is becoming more and more important. It is a key factor that restricts the progress of the project, affects the construction period of the project and endangers the health of the workers in the cave. [0003] Tunnel ventilation is a key process of drilling and blasting tunnel construction. The construction te...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21F1/00
CPCE21F1/006
Inventor 黄元庆肖辰裕叶康慨何小亮翟志恒熊文安时林伟
Owner CHINA RAILWAY TUNNEL GROUP CO LTD
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