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相应的预应力螺纹钢锚杆和预应力锚支护技术是在原有的锚杆支护材料基础上的又一步更新,它们以长度较大及可以施加较大预应力,限制岩体有害变形的发展的优点,逐步取代了原有的楔缝式锚杆、涨圈式锚杆、树脂锚杆等。由于支护材料的逐走更新、相应带来了打眼及安装设备的更新。气动式锚杆钻机以体积小、重量轻、转矩大、操作简单、维修方便等特点,正在得到逐步的推广和使用。但用户在气动锚杆钻机选型和使用中存在一些不合理现象,现就这两方面谈点看法,供大家参考。
Corresponding prestressed rebar anchor bolt and prestressed anchor support technology is a new step on the basis of the original anchor support material. They are large in length and can be applied with large prestress to limit the detrimental deformation of rock mass The advantages of development, and gradually replace the original wedge slot anchor, up ring bolt, resin anchor and so on. Due to the evacuation of the support material, there has been an update of drilling holes and installing equipment. Pneumatic bolt drilling rig to small size, light weight, large torque, simple operation, easy maintenance and other features, is being gradually promoted and used. However, users in the selection and use of pneumatic bolt rig there are some unreasonable phenomenon, now talk about these two views, for your reference.