Ventilation method for auxiliary double-hole construction in inclined shaft

A ventilation method and ventilation method technology, which is applied to the ventilation of mines/tunnels, earthwork drilling, mining equipment, etc., to achieve the effects of saving air ducts, good effect, and high ventilation efficiency

Active Publication Date: 2018-03-09
CHINA RAILWAY TUNNEL GROUP CO LTD +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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 for auxiliary double-hole construction in inclined shaft
  • Ventilation method for auxiliary double-hole construction in inclined shaft
  • Ventilation method for auxiliary double-hole construction in inclined shaft

Examples

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Embodiment 1

[0031] This example takes the Angren-Pop railway in Uzbekistan as an example of the 1# inclined shaft of the 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 in length) parallel to the main tunnel is built. The distance between the main tunnel and the center of the safety tunnel is 29m. The main tunnel and the safety tunnel are connected by connecting channels, and the distance between the connecting channels is 300m. The tunnel must be completed on September 1, 2016. In order to meet the requirements of the construction period, three inclined shafts will be 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 will be set up to assist the construction. The amount of construction tasks for the positive hole of each auxiliary inclined shaft is shown in 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 a ventilation technology for tunnel construction, in particular to a ventilation method for auxiliary double-hole construction of inclined shafts. Background technique [0002] With the development of the national economy, the number of long tunnels in railway construction is increasing. Drilling and burst 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 the blasting and the operation of the internal combustion engine has become more and more important. A key factor that restricts the progress of the project, affects the duration of the project and endangers the health of the workers in the cave. [0003] Tunnel ventilation is the key process of tunnel construction by drilling and blasting method. The quality of construction tech...

Claims

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Application Information

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Patent Type & Authority Patents(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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