Drill bit grouting stopping and drill stem sublevel retreating type grouting method

The invention discloses a drill bit grouting stopping and drill stem sublevel retreating type grouting method. The drill bit grouting stopping and drill stem sublevel retreating type grouting method comprises the following steps of starting a drilling machine to drill a hole in a designed position;...

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Bibliographic Details
Main Authors LUO ZHANFU, XU QIPENG, SHI JIYAO, LI GUANGYUE, WANG YUE, FU ZHONGRUN, ZOU CHONG, SONG YAN, XU HAITING, CHAO NING
Format Patent
LanguageChinese
English
Published 03.12.2019
Subjects
EARTH DRILLING
FIXED CONSTRUCTIONS
GALLERIES
LARGE UNDERGROUND CHAMBERS
MINING
SHAFTS
TUNNELS
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Summary:The invention discloses a drill bit grouting stopping and drill stem sublevel retreating type grouting method. The drill bit grouting stopping and drill stem sublevel retreating type grouting method comprises the following steps of starting a drilling machine to drill a hole in a designed position; after the hole is drilled to a depth of a double pipe drill stem, detaching a high pressure water and air supply system; taking another double pipe drill stem and a hydraulic capsule liquid transport tube to be connected with the double pipe drill stem and a hydraulic capsule liquid transport tube in the hole; continuing to drill the hole to the depth of the double pipe drill stem; continuously prolonging the double pipe drill stem and the hydraulic capsule liquid transport tube till the hole isdrilled to a designed depth; injecting liquid into a grouting stopping hydraulic capsule through each hydraulic capsule liquid transport tube in sequence so that the grouting stopping hydraulic capsule expands in the radial
Bibliography:Application Number: CN201910916809