Abrégé

Disclosed in the present invention is a hollow-hole burn cut three-time blasting method. In the method, a pilot tunnel is excavated on one side of the centerline of a tunneling section and in a direction where there is no target to be protected on a working face; the pilot tunnel divides the tunneling section into an advanced pilot tunnel region and a main blasting region; the advanced pilot tunnel region is blasted twice, and the main blasting region is then subjected to third blasting; the drilling footage of the third blasting is equal to that of the first blasting of the advanced pilot tunnel; and after one blasting cycle, a reserved pilot tunnel is formed in a new tunneling section, such that starting from a second cycle, blasting can be performed according to a normal cyclic drilling footage, and a situation that rock slag covers the bottom of the main blasting region after the first cyclic pilot tunnel blasting does not occur, thus providing a faster mode for blasting implementation of all sections.

Classes IPC  ?

• F42D 1/00 - Appareils ou procédés de sautage, p. ex. pour le chargement en explosifs ou de bourrage
• F42D 3/04 - Applications particulières de techniques de sautage pour faire sauter des rochers
• E21D 9/00 - Tunnels ou galeries, avec ou sans revêtementsProcédés ou appareils pour leur exécutionTracé des tunnels ou des galeries

Abrégé

A method of treating tunnel collapse includes leveling a collapse body and moving a pavilion support under the collapse cavity, lifting a shield plate until a lower edge of the shield plate surpasses a contour line of an initial supporting arch of a tunnel, connecting a bottom column and inserting a padding plate under a column. If the hydraulic prop retracts, the column, the bottom column, the padding plate and the hydraulic prop bear a load from the shield plate. Mounting and connecting the initial supporting arch, welding the intersection point of the column and the initial supporting arch, cutting off the column in the initial supporting arch. Transferring the load of the shield plate from the pavilion support to an initial supporting shed, spraying fast-setting concrete to a grid arch to form a closed shell, and pumping filling material to fill the space of the collapse cavity.

Classes IPC  ?

• E21D 19/00 - Couvertures protectrices temporaires pour l'espace de travail
• E21D 11/10 - Revêtement avec des matériaux de construction avec du béton coulé en placeCoffrage ou autre équipement adapté à cet effet
• E21D 11/15 - Plaques de revêtementGarnissages, c.-à-d. revêtements conçus pour retenir les matériaux de la formation ou pour transmettre la charge aux éléments de support principaux
• E21D 11/18 - Éléments de cintre
• E21D 15/44 - Étançons hydrauliques, pneumatiques ou hydropneumatiques

Abrégé

A method of treating tunnel collapse includes mounting a shield plate, a column, a support column to form a combined support and moving the combined support onto an operation platform, lifting up the combined support, and enabling the height of canopy to be greater than the height of an initial supporting arch. Actively contacting a surface of a collapse cavity by a fixed support column and bearing a load, and lifting a movable support column to the top of the collapse cavity and bearing a load. Mounting an initial supporting arch, and welding the initial supporting arch with the support column. Removing a hydraulic prop after the support column contacting the initial supporting arch is cut off and the load of the shield plate is transferred to a supporting shed. Mounting an exhaust pipe and a filling material pumping pipe, and pumping a filling material into a collapse cavity space.

Classes IPC  ?

• E21D 11/00 - Revêtement de tunnels, galeries ou autres cavités souterraines, p. ex. de vastes chambres souterrainesRevêtements à cet effetLeur exécution sur place, p. ex. par assemblage
• E21D 11/10 - Revêtement avec des matériaux de construction avec du béton coulé en placeCoffrage ou autre équipement adapté à cet effet
• E21D 15/44 - Étançons hydrauliques, pneumatiques ou hydropneumatiques
• E21D 11/18 - Éléments de cintre
• E21D 19/04 - Couvertures protectrices temporaires pour l'espace de travail pour l'utilisation dans les galeries de chassage

Abrégé

A method for treating tunnel collapse by using a pavilion-type support, which relates to the technical fields of tunnels and underground engineering. The method is suitable for the situation in which a collapsed cavity is relatively stable and the collapsed cavity has a tall height and is not prone to contact the roof. The method comprises the following steps: leveling a collapsed body and moving a pavilion-type support to below a collapsed cavity; using hydraulic support columns (5) to lift a shield plate (2) until the lower edge of the shield plate exceeds the outer contour line of a tunnel primary support arch frame; connecting a bottom column (4) under a stand column (3) and inserting same into a base plate (22); if the hydraulic support columns are retracted, the stand column, the bottom column, the base plate and the hydraulic support columns jointly bear the load transmitted by the shield plate; installing and connecting the primary support arch frame (24) under the protection of the shield plate, welding the intersecting point between the stand column and the adjacent primary support arch frame, and cutting out the stand column in the primary support arch frame; after a single hydraulic support column is withdrawn, the load of the shield plate is smoothly transferred from the pavilion-type support to an initial support scaffold (25), quick-setting concrete is sprayed on a grid arch frame so as to form a closed housing, and a filling material is pumped to fill the space of the collapsed cavity. The described method has the advantages of low requirements for the lifting height of hydraulic support columns, safe construction and so on.

Classes IPC  ?

• E21D 19/04 - Couvertures protectrices temporaires pour l'espace de travail pour l'utilisation dans les galeries de chassage

Abrégé

A method for treating a tunnel collapse by using a roof-contacted shield plate support, relating to the technical field of tunnel engineering. In the method, a roof-contacted shield plate support is used for construction, and the method can adapt to different cave depths. The method comprises the following steps: install a shield plate (1), upright columns (2), support columns, etc. to form a combined support, move the combined support to a construction platform (23), lift the combined support by means of single hydraulic props (9) placed under the combined support, and make the height of a transverse beam (5), a longitudinal beam (6), the shield plate, and a guide pipe (14) greater than the installation height of a primary arch center (26); fixed support columns (3) actively contact a cave surface (25) and bears the load, then raise a movable support column (4) to the top of a cave (28) and bear same; install the primary arch center, and weld the primary arch center and the support columns; remove the single hydraulic props after cutting off the support columns, enter the primary arch center and complete the stress transfer and load shield to a primary scaffold (27); and install an exhaust pipe (17) and a filling material pumping pipe (15) to pump a filling material to a cave space. The method has the advantages of high degree of mechanization, large supporting capacity, safe and efficient construction, etc.

Classes IPC  ?

• E21D 19/04 - Couvertures protectrices temporaires pour l'espace de travail pour l'utilisation dans les galeries de chassage