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Title:
HIGH STRESS ROCK BURST ROADWAY BOLT, DESIGN METHOD AND WORKING METHOD
Document Type and Number:
WIPO Patent Application WO/2021/052192
Kind Code:
A1
Abstract:
A high stress rock burst roadway bolt, comprising a sectional bolt rod body (1), a bolt tail lock, a force transmission tray (3) and a sleeve (4). The sectional bolt rod body is provided with protrusions at intervals, and the tail end of the sectional bolt rod body is provided with a thread, the thread is sequentially provided with the force transmission tray and the bolt tail lock, the sleeve is provided outside the sectional bolt rod body, and the sleeve is composed of metal pipes axially provided with through seams, the outer sides of the metal pipes are provided with fine threads, and the inner sides of the metal pipes are provided with inwardly recessed structures matching the protrusions on the sectional bolt rod body. Also disclosed are a design method and a working method of such a bolt. The bolt has the advantages of high anchoring force, and high pre-tightening force and also has the advantage that partial breaking will not affect the overall anchoring effect, and can effectively avoid the problems that the current ordinary bolts have severe anchoring conditions, and are unable to adapt to high stress, large deformation, strong rock burst, the rock crushing engineering environment, etc.

Inventors:
MENG BO (CN)
MA ZHANYUAN (CN)
JING HONGWEN (CN)
YANG ZHIWEN (CN)
YANG SHENGQI (CN)
NING ZHANGXUAN (CN)
WANG YINGCHAO (CN)
ZHANG TIANCANG (CN)
HUANG YANHUA (CN)
JI RUNQING (CN)
YIN QIAN (CN)
WU JIANGYU (CN)
Application Number:
PCT/CN2020/113350
Publication Date:
March 25, 2021
Filing Date:
September 04, 2020
Export Citation:
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Assignee:
MENG BO (CN)
International Classes:
E21D21/00; E02D5/74; E21D20/02
Foreign References:
CN110578542A2019-12-17
CN102094662A2011-06-15
CN206246140U2017-06-13
CN205277465U2016-06-01
CN203515628U2014-04-02
CN103643977A2014-03-19
CN208502817U2019-02-15
DE29521197U11996-10-02
KR20160137876A2016-12-01
Attorney, Agent or Firm:
JW IP LAW FIRM (CN)
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