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吸能锚杆支护设备研究现状及展望

Research status and prospects of energy-absorbing anchor support equipment

  • 摘要: 吸能支护是地下岩体工程领域中用于提高围岩稳定性和避免冲击地压等灾害发生的一种重要的防治技术。吸能支护技术的核心原理是通过特定的结构设计,使支护体系在岩体发生位移或变形时能够有效的吸收或消耗能量,从而减少由冲击载荷引发的工程破坏和事故。吸能锚杆是吸能支护的一种常见形式,此技术通过锚杆将表面围岩与深部稳定岩体相结合,并在围岩内部产生预应力吸收或耗散能量从而避免矿山灾害的发生。吸能锚杆这种柔性支护方式适用于多种环境的巷道支护,现已被广泛应用于矿山灾害的防治。综述自1968年以来30余种具有代表性意义的吸能锚杆设计方式,以结构和材料2大类型为切入点进行划分,着重分析共8种典型吸能锚杆的工作原理与设计优势,并以此指出现有吸能锚杆支护在应用中所存在的安全性与智能性等方面的不足。结合前人研究成果与目前深部矿井支护高强度与智能化等需求,提出了一种智能预警负泊松比结构吸能锚杆。该锚杆利用负泊松比吸能结构实现增阻效果,具有双向恒阻吸能与双向监测预警等特性,能够满足复杂的非线性软岩巷道强阻支护、可视化预警等需求,有助于加快支护体系一体化,促进安全、智慧矿山的发展。最后,对吸能锚杆支护设备的优化革新趋势进行了展望。

     

    Abstract: Energy-absorbing support is a prevention and control technology. It aims to improve the stability of surrounding rock. It seeks to prevent occurrence of rock bursts and other disasters in underground rock field. Its principle is to make the support system absorb energy when the rock is displaced or deformed by a specific structural design so as to minimize the damages and accidents triggered by impact loads. Energy-absorbing anchor is a common form of energy-absorbing support. It connects the surrounding rock to the stable rock mass through anchors. This creates pre-stress inside the surrounding rock, allowing it to absorb energy and prevent disasters. This flexible support is suitable for tunnel support in a variety of setting and is widely used in the prevention and control of mining disasters. This study have summarized more than 30 typical anchors since 1968. We have analyzed the working principle and the design advantages of 8 types of energy-absorbing anchors in terms of structure and material, and pointed out the shortcomings of the existing energy-absorbing anchors in terms of safety and intelligence. We have combined with valuable research results of predecessor and current demands for high strength and intelligence in deep mine support, and proposed a new type of intelligent warning energy-absorbing anchor with a negative poisson’s ratio structure. This anchor utilizes a negative poisson's ratio energy-absorbing structure to achieve a drag-boosting effect .It features two-way constant resistance energy absorption and warning capabilities. The design is intended to meet the strong support needs of complex non-linear soft rock tunnels. This anchor fulfills visualization and warning requirements. This innovation is expected to accelerate the integration of the support system and promote the development of safe and intelligent mines, ultimately enhancing energy-absorbing anchor support. Finally, this study provided an outlook on the optimization and innovation trends of energy-absorbing anchor support equipment.

     

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