Large-section tunnel circular blasting and tunnelling method

Large-section tunnel circular blasting and tunnelling method

The invention discloses a large-section tunnel circular blasting and tunnelling method. The large-section tunnel circular blasting and tunnelling method comprises the following steps that a segment of guiding tunnel is tunnelled in the middle of the bottom end of the tunnel face of a large-section t...

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Hauptverfasser: LI LEIBIN, XUAN DEQUAN, HUANG GANG, JIANG TINGTING, ZHANG JIANHUA, YE YONGXI, LI DONGPENG, SHI JI, SHUAI BAOLIN
Format: Patent
Sprache:chi ; eng
Schlagworte:
AMMUNITION
BLASTING
HEATING
LIGHTING
MECHANICAL ENGINEERING
WEAPONS
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container_title
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creator LI LEIBIN
XUAN DEQUAN
HUANG GANG
JIANG TINGTING
ZHANG JIANHUA
YE YONGXI
LI DONGPENG
SHI JI
SHUAI BAOLIN
description The invention discloses a large-section tunnel circular blasting and tunnelling method. The large-section tunnel circular blasting and tunnelling method comprises the following steps that a segment of guiding tunnel is tunnelled in the middle of the bottom end of the tunnel face of a large-section tunnel in the extension direction of the large-section tunnel; guiding holes are punched in a plurality of cross sections of the guiding tunnel according to a certain depth in the radial direction, and the guiding holes are distributed in a fan shape along the guiding tunnel; a plurality of large-section perimeter holes are punched in edges of fan-shaped outlines formed by the distribution of the multiple guiding holes in the axial direction of the guiding tunnel; after the guiding holes and the large-section perimeter holes are detonated, a segment of the large-section tunnel is formed, a passage is shovelled out in the middle of the large-section tunnel, and the waste stones detonated and caved are shovelled to th
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subjects AMMUNITION
BLASTING
HEATING
LIGHTING
MECHANICAL ENGINEERING
WEAPONS
title Large-section tunnel circular blasting and tunnelling method
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