Title:
NOVEL MINING DOUBLE-LAYER BOREHOLE WALL HAVING ROOT-TYPE ANCHORING
Document Type and Number:
WIPO Patent Application WO/2020/259266
Kind Code:
A1
Abstract:
A mining double-layer borehole wall having root-type anchoring, comprising a double-layer borehole wall and anchoring components (6), a first end of each anchoring component (6) being disposed in surrounding rock (1), a second end thereof being fixedly connected to the double-layer borehole wall, and the plurality of anchoring components (6) being arranged on the double-layer borehole wall along the circumferential direction thereof; the double-layer borehole wall comprises an outer borehole wall (2) and an inner borehole wall (3); each anchoring component (6) comprises an anchoring rod (7) and steel cables (13); a first end of each anchoring rod (7) is disposed in the surrounding rock (1) outside of the outer borehole wall (2), and a second end thereof is connected to an outer borehole wall steel grid (4) provided inside the outer borehole wall (2); a first end of each steel cable (13) is connected to the second end of the anchoring rod (7), and a second end thereof is connected to an inner borehole wall steel grid (5) provided inside the inner borehole (3); and a waterproof plastic plate is arranged between the outer borehole wall (2) and the inner borehole wall (3). Applying flexible restraints to the inner wall increases the overall load-bearing capability of the borehole wall, and allows for a corresponding reduction in the diameter of the vertical rebar in the outer wall, reduction in the surface area requiring excavation, and reduction in the surface area requiring freezing, thus reducing borehole construction costs.
Inventors:
WANG LEI (CN)
LI FANGZHENG (CN)
CUI HAO (CN)
GAO WEI (CN)
XU SHURONG (CN)
TAN JIE (CN)
JIANG GUOJING (CN)
ZHANG JIWEI (CN)
CHEN HONGLEI (CN)
KONG LINGHUI (CN)
JIANG HAOLIANG (CN)
HAN YUFU (CN)
DING HANG (CN)
FANG LIANGWEN (CN)
LI FANGZHENG (CN)
CUI HAO (CN)
GAO WEI (CN)
XU SHURONG (CN)
TAN JIE (CN)
JIANG GUOJING (CN)
ZHANG JIWEI (CN)
CHEN HONGLEI (CN)
KONG LINGHUI (CN)
JIANG HAOLIANG (CN)
HAN YUFU (CN)
DING HANG (CN)
FANG LIANGWEN (CN)
Application Number:
PCT/CN2020/094903
Publication Date:
December 30, 2020
Filing Date:
June 08, 2020
Export Citation:
Assignee:
CHINA COAL MINE ENG CO LTD (CN)
International Classes:
E21D5/11; E21D1/12; E21D5/12
Foreign References:
| CN110185451A | 2019-08-30 | |||
| CN109519174A | 2019-03-26 | |||
| CN2841963Y | 2006-11-29 | |||
| CN206845206U | 2018-01-05 | |||
| CN208920979U | 2019-05-31 | |||
| US20160318710A1 | 2016-11-03 |
Attorney, Agent or Firm:
BEIJING GAOWO LAW FIRM (CN)
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