The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Sep. 02, 2025
Filed:
Oct. 30, 2023
Powerchina Kunming Engineering Corporation Limited, Yunnan, CN;
Huaneng Lancang River Hydropower Inc, Yunnan, CN;
Institute of Rock and Soil Mechanics, Chinese Academy of Sciences, Hubei, CN;
Guojin Zhu, Yunnan, CN;
Pengzhi Pan, Yunnan, CN;
Xuexing Cao, Yunnan, CN;
Yangyi Zhou, Yunnan, CN;
Zhaofeng Wang, Yunnan, CN;
Shijie Yang, Yunnan, CN;
Xufeng Liu, Yunnan, CN;
Huyue Zhan, Yunnan, CN;
Fengqiong Li, Yunnan, CN;
POWERCHINA Kunming Engineering Corporation Limited, Kunming, CN;
Huaneng Lancang River Hydropower Inc, Kunming, CN;
Institute of Rock and Soil Mechanics, Chinese Academy of Sciences, Wuhan, CN;
Abstract
A zonal bolt-grouting support device and method for cataclastic rock mass large deformation of a high-stress tunnel, the method includes: drill holes in surrounding rock of a tunnel against a tunnel face after rock mass excavation, install high-strength prestressed anchor members, apply a preload to anchor bolts when expansion anchoring agent is fully expanded and has a certain strength, and zonally grout the surrounding rock after stress adjustment. The high-strength prestressed anchor member comprises an anchor bolt, an expansion anchor agent, a decoupling material, a grouting device, a reverse anti-skid device, etc. The grouting device consists of a shallow grouting steel pipe, a deep grouting steel pipe and a grouting stop valve, and the grouting steel pipe is arranged side by side with the anchor bolt in a drill hole. The technical proposal of the invention effectively inhibits the large deformation of a cataclastic rock mass.