Many breakings in anchor bolts and cables in tunnel of deep soft rock were one of problems faced by roadway supporting. Based on the conditions without changing the specifications and material of supporting, the yield supporting device of anchor bolts and cables was invented. The functional principle of the yield supporting device was analyzed, that the reserved compression in yield supporting device can protect anchor bolts and cables from broken. At the same time, it could keep high resistance and yield supporting to constraint the surrounding rock deformation. The experimental research on the mechanical property of the yield supporting device was based on the MTSS15.02 Rock Mechanics Test System, By using the method of given deformation, the experiment adopted the displacement-controlled modes with the speed of O. 05 mm/s to test the mechanical properties of three groups of the yield supporting device. The tests results indicated that these three groups of devices could respectively match with common anchor bolts, cables ofφ 17. 8 mm and cables ofφ 18.9 mm for use.%深部软岩巷道中大面积锚杆、锚索破断现象是巷道支护面临的一个难题.在不需要改进支护材料规格和材质的基础上研制了锚杆、锚索让压装置.分析了让压装置的作用原理,让压装置预留压缩量补偿围岩变形,避免了锚杆、锚索破断,同时实现高阻让压,阻止围岩变形.让压装置力学特性实验研究基于MTS815.02型岩石伺服渗透试验系统,实验采用给定变形的方式,按照位移控制模式以0.05mm/s的速度加载,测试了3组让压装置的力学特性,实验结果表明,3组让压装置可分别配套于普通锚杆、ф17.8 mm锚索、ф18.9 mm锚索的使用.
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