Ventilation method for auxiliary double-hole construction in inclined shaft

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...

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.

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