Pressure -yielding device of surrounding rock anchor rod

The utility model relates to a pressure -yielding device of surrounding rock anchor rod belongs to the stock field. The lower pot head that should enclose the rock anchor pole have the stock dish withlie in the stock dish outside and with the nut that encloses rock anchor pole screw -thread fit, this pressure -yielding device of surrounding rock anchor rod is including setting up sheeting caps and the spring between country rock lateral wall and stock coil, the spring is located the sheeting caps inboard, and the two is closely laminated, and sheeting caps and spring all overlap on enclosingthe rock anchor pole, the upper surface and the country rock lateral wall looks butt of sheeting caps and spring, sheeting caps and spring lower surface and stock dish looks butt. The very little sizethat is greater than the stock dish of headblock board ruler, the size of spring is less than the size of stock dish. This pressure -yielding device of surrounding rock anchor rod has improved the supporting performance, and p