Ccteg Coal Mining Research Institute

Tiandi Science & Technology Co., Ltd.

Yongzheng Wu

Chang Liu

Jianwei Yang

Jie He

Chao Luo

Xinhua Liu

Xiaoming Cao

Zhiliang Chen

Xianzhi Meng

Pengfei Jiang

Hongpu Kang

Ziyue Wang

Jinyu Chen

Yukai Fu

Yaozhong Wei

Xiaowei Chu

Jichang Guo

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 three-level prevention and control method for a rock burst roadway, the method comprising: pre-weakening a thick and hard rock layer above a roadway before the roadway is excavated; carrying out prestress support, pressure relief and reinforcement when the roadway is excavated; and carrying out stress transfer on an advance abutment pressure, and arranging a composite energy absorption protective structure around the roadway before the mining of a working face. By coordinating the spatio-temporal relationship between pressure relief, support and prevention, the energy dissipation in the rock burst roadway is changed from an unstable, disorderly and uncontrollable dissipation state to a stable, orderly and controllable dissipation state.

Three-level prevention and control method for rock burst roadway

Growing community of inventors

Beijing, China

Yongzheng Wu