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.