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为了进一步研究恒阻大变形锚杆的拉伸力学性能,采用室内拉伸试验和现场实践相结合的方法,通过恒阻大变形锚杆(索)静力拉伸试验系统对恒阻大变形锚杆进行拉伸试验,从支护能力、锚杆伸长量、直径变形量和吸收能量4个方面对试验数据进行对比分析,并对其进行工程应用。试验与应用结果表明,恒阻大变形锚杆能够在顺应围岩大变形过程中,通过对围岩提供恒定的支护阻力,实现岩体内部变形能量的有控制性释放,从而达到支护体–围岩共同作用的巷道稳定性控制目标。恒阻大变形锚杆独有的恒定较高支护阻力、大拉伸量、锚杆变粗、吸收能量能力强的特点为易发生大变形破坏的软岩及深部巷道工程稳定性控制提供了有效途径。
In order to further study the tensile mechanical properties of large deformation and constant deformation of the anchor rod, indoor tensile test and field practice combined method, through the constant resistance large deformation anchor (cable) static tensile test system constant resistance large deformation anchor Tensile test was carried out. The test data were compared and analyzed from four aspects of support ability, bolt elongation, diameter deformation and absorbed energy, and the engineering application was carried out. The test and application results show that the large deformation resistance anchor rod can achieve controlled release of the deformation energy inside the rock mass by providing constant support resistance to the surrounding rock in conformity with the large deformation of the surrounding rock so that the support body Surrounding Rock Constrains the Goal of Roadway Stability Control. The constant high support resistance, large stretching capacity, thickening of anchor bolt and strong ability of absorbing energy are the unique characteristics of constant resistance and large deformation bolt, which are provided for the stability control of soft rock and deep roadway prone to large deformation and failure Effective Ways.