关键词: 恒阻大变形锚索, 力学特性, 切顶留巷, 深部开采

Abstract: In order to solve the problems that the large deformation of deep surrounding-rock and the conventional support materials are easy to break and fail, the structure, working principle and mechanical characteristics of the constant resistance and large deformation anchor rope are studied. The indoor test results show that the constant resistance anchor rope can maintain a constant working resistance of 350kN during static tensile and power impact, which shows the good resistance impact of the constant resistance anchor rope and the constant resistance suction energy characteristics. The constant resistance anchor rope is applied to the deep gob-side entry retaining by cutting roof, most of the constant resistance anchor ropes produce a certain indentation，which shows the constant resistance anchor ropes absorb the deformation energy of the surrounding rock well. The surrounding-rock of gob-side entry retaining achieve stability about 300m behind the work surface, all indicators can meet the requirements of on-site use. The surrounding-rock deformation of the deep gob-side entry retaining by cutting roof is controlled well by the constant resistance and large deformation anchor rope，thus the reliability of constant resistance anchor rope support is verified.