Anti-seismic support method for mine shaft
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
Aug 30, 2022
Grant Date -
N/A
app pub date -
Jun 24, 2021
filing date -
Jul 16, 2020
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
An anti-seismic support method for a mine shaft includes: providing a circular support groove in a liquefaction-prone layer of the mine shaft; providing horizontal support holes in a groove wall, and fixing an outer support spring steel cylinder against the groove wall; drilling vertical support holes at a groove bottom, anchoring a vertical anchor rod group into the vertical support holes, and injecting an expansion anchoring slurry into the vertical anchor rod group; making a lower positioning support ring abut against an upper end of the vertical anchor rod group and an inner wall of the outer support spring steel cylinder; fixing an anti-seismic connecting rod group between lower and upper positioning support rings; making an outer wall of an inner support spring steel cylinder abut against the upper and lower positioning support rings; and providing an upper support cover seat atop the outer and inner support spring steel cylinders.
First Claim
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International Classification(s)
- 2021 Application Filing Year
- E21D Class
- 83 Applications Filed
- 54 Patents Issued To-Date
- 65.07 % Issued To-Date
Cited Art Landscape
Patent Citation Ranking
- 0 Citation Count
- E21D Class
- 0 % this patent is cited more than
- 3 Age
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