Tunnel excavation method

Tunnel excavation method

The invention relates to the technical field of tunnel construction, in particular to a tunnel excavation method. The tunnel excavation method comprises the steps that the rock mass strength of a tunnel face is detected; value and direction of ground stress in front of the tunnel face are monitored,...

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Hauptverfasser: ZHANG XUZHEN, LI HUI, HE WEI, LI JUN, YANG MUGAO, WANG XINDONG, LI GUOLIANG, QU XIAOWEI
Format: Patent
Sprache:chi ; eng
Schlagworte:
EARTH DRILLING
FIXED CONSTRUCTIONS
GALLERIES
LARGE UNDERGROUND CHAMBERS
MINING
SHAFTS
TUNNELS
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creator ZHANG XUZHEN
LI HUI
HE WEI
LI JUN
YANG MUGAO
WANG XINDONG
LI GUOLIANG
QU XIAOWEI
description The invention relates to the technical field of tunnel construction, in particular to a tunnel excavation method. The tunnel excavation method comprises the steps that the rock mass strength of a tunnel face is detected; value and direction of ground stress in front of the tunnel face are monitored, so that an occurrence condition and an occurrence position of rockburst are pre-judged; drilling iscarried out on the tunnel face to form pre-drilled holes, and the pre-drilled holes are located at an excavation contour line of the tunnel face; the pre-drilled holes are filled with explosives, andlocal blasting is carried out on the pre-drilled holes, so that a plurality of cracks extending out of the excavation contour line are formed around the pre-drilled holes; water is injected into thepre-drilled holes, and the water injection pressure is adjusted according to the surrounding rock strength of the tunnel face, so that water enters the cracks and the cracks are enlarged; and a section of tunnel is excavated fo
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subjects EARTH DRILLING
FIXED CONSTRUCTIONS
GALLERIES
LARGE UNDERGROUND CHAMBERS
MINING
SHAFTS
TUNNELS
title Tunnel excavation method
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