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随着煤矿采深的不断增加,巷道表层的地应力也不断加大,锚杆支护不仅要考虑支护体系的强度问题,还要考虑巷道的变形量。在地应力高的大变形巷道中,普通锚杆因不能适应巷道表层的变形而被拉断失效。1 让压锚杆简介新型让压锚杆是针对深井大变形巷道而专门设计的一种可延伸锚杆,该锚杆由高强杆体、让压管、托盘及螺母等部件组成。与普通的锚杆体
With the continuous increase of coal mining depth, the surface stress of the roadway is also increasing. The bolt support not only needs to consider the strength of the supporting system, but also the deformation of the roadway. In the large deformation of high stress roadway, the ordinary bolt can not be adapted to the deformation of the surface of the roadway was pulled off failure. 1 Introduction to the pressure anchor The new pressure relief anchor is a kind of extendable anchor specially designed for the deep large deformation roadway. The anchor rod is made of high strength rod, which makes the pressure pipe, tray and nut and other components. And ordinary anchor body