Tiandi Science & Technology Co., Ltd.

Ccteg Coal Mining Research Institute

Beijing Goaldrill Technology Co., Ltd.

Xiaoming Cao

Chang Liu

Jianwei Yang

Chao Luo

Jiaqi Chen

Yanfeng Shi

Ziyue Wang

Yongzheng Wu

Hongpu Kang

Yaozhong Wei

Jichang Guo

Zhiliang Chen

Pengfei Jiang

Disclosed are a method and system for temporary coating supporting and permanent bolt supporting. Tunnel excavation construction operation is composed of a plurality of operation cycle units, and each of the operation cycle units includes: excavating by at least one row pitch to form a new tunnel; spraying a coating material onto a surface of the new tunnel to form a sealing coat on a surface of surrounding rock, wherein the sealing coat has an adhesive property and a sealing property both meeting preset conditions, and has a tensile strength and a toughness needed for supporting; and inserting bolts into the new tunnel to perform permanent supporting.

Method and system for temporary coating supporting and permanent bolt supporting

A constant load clamping apparatus of injector head of coiled tubing drilling machine, wherein the apparatus comprises: a ropeslice-ropeslice-rope structure, wherein a first connection piece and a second connection piece are connected at both ends of the ropeslice-rope structure;

Constant load clamping apparatus of injector head of coiled tubing drilling machine and design method thereof

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Beijing, China

Xiaoming Cao