A new type bolt is developed,and breaking mechanism of present bolt-end is analyzed,and proofed breaking mechanism of new type bolt is given.

• 分析了现行锚杆尾部的破断机制,研制了一种新型金属粗尾锚杆,阐明了新型金属粗尾锚杆的防破断机理。通过分析,得出金属粗尾锚杆较其它锚杆不易发生断裂