Title:
LARGE-SPAN FALSE ROOF STRUCTURE USING DOWNWARD HORIZONTAL APPROACH FILLING METHOD, AND CONSTRUCTION METHOD
Document Type and Number:
WIPO Patent Application WO/2023/134375
Kind Code:
A1
Abstract:
Disclosed is a large-span false roof structure of a downward horizontal approach filling method, the structure comprising a cemented filling body, a prefabricated framework, and fixing anchor rods (4), wherein the prefabricated framework comprises an arc-shaped net rack (6), rectangular net racks (5), a pre-tensile stress steel bar (3), steel bar anchor rods and a metal net (7); the arc-shaped net rack (6) is arranged at the bottom of a filling false roof and is a double-layer net rack; the pre-tensile stress steel bar (3) is welded to two ends of a lower-layer steel bar at the bottom of the arc-shaped net rack (6), and the rectangular net racks (5) are arranged on two sides of the arc-shaped net rack (6); steel bar anchor rods I (1) are welded to the rectangular net racks (5), and steel bar anchor rods II (2) are welded to the arc-shaped net rack (6); and the rectangular net racks (5) are fixed to a side wall by means of the fixing anchor rods (4), the metal net (7) is arranged on back sides of the rectangular net racks (5) and an upper portion of the pre-tensile stress steel bar (3), and the arranged prefabricated framework is filled with the cemented filling body. The structure has the advantages such as being reasonable in terms of structure, high in terms of strength, and good in terms of safety, the approach size can be effectively increased on the basis that safety is guaranteed, thereby significantly improving the mining efficiency, and the structure is particularly suitable for deep mining. Further disclosed is a construction method using the structure.
Inventors:
SUN XIAOGANG (CN)
WANG YU (CN)
TONG CHUAN (CN)
FU JIANXIN (CN)
WANG YU (CN)
TONG CHUAN (CN)
FU JIANXIN (CN)
Application Number:
PCT/CN2022/138800
Publication Date:
July 20, 2023
Filing Date:
December 13, 2022
Export Citation:
Assignee:
JIAOJIA GOLD MINE OF SHANDONG GOLD MINING LAIZHOU CO LTD (CN)
UNIV BEIJING SCIENCE & TECHNOLOGY (CN)
UNIV BEIJING SCIENCE & TECHNOLOGY (CN)
International Classes:
E21D11/00
Foreign References:
| CN114046157A | 2022-02-15 | |||
| CN111878117A | 2020-11-03 | |||
| AU1758000A | 2000-05-25 | |||
| CN109595016A | 2019-04-09 | |||
| CN111561318A | 2020-08-21 | |||
| US20160108619A1 | 2016-04-21 |
Attorney, Agent or Firm:
BEIJING GUANGYOU PATENT LAW OFFICE CO., LTD. (CN)
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