Abstract:
The surrounding rock of the deep roadway in China is in the “three high” corrosion environment of high ground stress, high ground temperature and high salt water for a long time, resulting in serious corrosion of the supporting bolt in a short period of time, leading to a large decrease in the support strength and a significant decrease in the safety factor of mining.It is found that the corrosion failure of bolt is a comprehensive effect of stress corrosion and electrochemical reaction, so it is proposed to prevent corrosion treatment of mine bolt cable from two aspects of production and construction technology and material optimization and protection, including: mine drainage water, bolt anchor cable full-length anchorage, roadway surface closure, development of corrosion-resistant materials, optimization of processing technology, anti-corrosion surface treatment, etc.The design principle and flow of bolt anchor cable support under corrosive environment is given.