基于智能拉拔测试系统的锚杆锚固力现场高效评测方法

Field Rapid Evaluation Method of Bolt Anchoring Force Based on Intelligent Pull-out Test System

锚杆锚固力现场评测是锚杆支护效果评价、支护参数设计与优化的基础。为解决当前锚杆锚固力现场测试方法与设备存在的效率低、携行困难、数据采集不连续和测试过程连接复杂等问题,基于自主研发的锚杆智能拉拔测试系统,提出了锚杆现场检测快速连接技术,开发了荷载—位移实时采集软件对拉拔全过程的荷载与位移数据进行智能分析与可视化。将研发的拉拔系统应用于新城金矿对锚杆现场锚固力进行评测,结果表明:长2.4 m、壁厚2.5 mm、管径差2 mm的管缝锚杆平均锚固力为61.5 kN,位移可达150 mm以上;长2.2 m、直径22 mm的端锚树脂锚杆锚固力可达230 kN,位移约120 mm;长2.2 m、直径22 mm的涨壳式锚杆锚固力可达94.5 kN,位移为25 mm。现场应用验证了锚杆智能拉拔测试系统具有便捷高效、智能分析的特点,有助于降低矿山锚杆测试成本,可为锚杆锚固力现场定量评测提供数据支撑,可为智能矿山建设、科学管理与决策提供技术支持。

The field evaluation of bolt anchoring force is the basis of bolt support effect evaluation,support parameter design and optimization.In order to solve the problems of low efficiency,difficult carrying,discontinuous data acquisition and complex connection in the current field test method and equipment of anchor bolt anchoring force,based on the independent research and development of anchor bolt intelligent pull-out test system,the fast connection technology of anchor bolt field detection is proposed,and the load displacement real-time acquisition software is developed to intelligently analyze and visualize the load and displacement data in the whole process of pull-out.The developed drawing system is applied to Xincheng Gold Mine to evaluate the field anchoring force of bolt.The test results show that the average anchoring force of the pipe joint bolt with a length of 2.4 m,a wall thickness of 2.5 mm and a diameter difference of 2 mm is 61.5 kN,and the displacement can be more than 150 mm.The end anchored resin anchor with a length of 2.2 m and a diameter of 22 mm has an anchoring force of 230 kN and a displacement of about 120 mm.The anchoring force of the 2.2 m long and 22 mm diameter shell expansion anchor rod can reach 94.5 kN and the displacement is 25 mm.The field application has verified that the bolt intelligent pull-out test system has the characteristics of convenience,efficiency and intelligent analysis,which is helpful to reduce the test cost of mine bolt,provide data support for the field quantitative evaluation of bolt anchoring force,and provide technical support for intelligent mine construction,scientific management and decision-making.