Three dimensional multi-phase tunneling method and...

F - Mech Eng,Light,Heat,Weapons – 42 – D

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F42D 1/00 (2006.01) E21C 37/16 (2006.01) E21D 9/00 (2006.01) E21D 9/10 (2006.01) E21D 9/11 (2006.01) F42D 3/00 (2006.01)

Patent

CA 2381231

A three dimensional multi-phase tunneling method and equipments thereof, make it possible that a drilling and blast- ing process can be carried out simultaneously during excavating a pilot tunnel by means of tunnel boring machine (TBM), thereby is capable of reducing the period and the cost of excavation. The three dimensional multi-phase tunneling method includes the steps of drilling an oblique charge hole on an upper half section in a pilot tunnel being excavated by a tunnel boring machine (TBM) and drilling an outermost charge hole to a predetermined length in a tunneling direction (longitudinal direction) at an outermost tunneling section during excavating the pilot tunnel, and charging and blasting the upper half section, wherein the oblique charge hole is turned at a predetermined angle from a transverse direction to a longitudinal direction, and charging and blasting the lower half section except the central portion apart by a predetermined distance from the tunnel face after drilling a longitudinal hole.

L'invention porte sur un procédé de creusement de tunnel multiphase tridimensionnel et sur des équipements correspondants. Ce procédé permet de réaliser simultanément un processus de forage et d'abattage à l'explosif lors du creusement d'une galerie pilote au moyen d'une machine à creuser les galeries, la durée et les coûts du creusement étant ainsi réduits. Le procédé de creusement multiphase tridimensionnel consiste à forer un trou de chargement oblique sur une demi-section supérieure d'une galerie pilote au moyen d'une machine à creuser les galeries et à forer un trou de chargement externe sur une longueur prédéterminée dans le sens du creusement (sens longitudinal) au niveau d'une section externe au cours du creusement de la galerie pilote, et à charger et abattre à l'explosif la demi-section supérieure, le trou de chargement oblique étant formé au niveau d'un angle prédéterminé d'un sens transversal à un sens longitudinal, et charger et abattre à l'explosif la demi-section inférieure, excepté la partie centrale espacée d'une distance prédéterminée de la face de la galerie, après forage d'un trou longitudinal.

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