Abstract: China has been using bolt support for coal mine support projects since 1954 and has a history of more than 60 years. At the beginning of the introduction, due to the complicated geological conditions of coal mines, large deformation of surrounding rock of roadway, and imperfect monitoring methods, bolt supporting is developing slowly in China. Chinese coal resources are abundant. By the 1990s, the state’s investment in coal mining has increased, and China’s bolt supporting technology has been greatly developed, and it is increasingly used in other filds. At the same time, with the using of underground space, the drawbacks of bolt supporting are also exposed. The bolts are permanently discarded in the ground, which pollute the environment and increase the difficulty of subsequent utilization of underground space. Compared with traditional anchors, retrievable anchors have the following advantages: (1) the anchors can be reused and the overall cost is reduced; (2) the anchors do not stay underground, which is conducive to environmental protection. However, with the deepening of the application of recyclable anchors in various fields, the physical and mechanical properties of various rock masses are quite different. Recyclable anchors need to be explored from multiple angles to explore new structures, new forms and surrounding rock coordination. Deformation mechanism, coupling deformation under various environmental effects and applicability of retrievable anchors for large deformation surrounding rock. There are many types of retrievable anchors, and the anchoring mechanism is complex and diverse. There is no uniform anchoring principle; the construction process of some retrievable anchors is complicated, the manpower and material resources required for recycling are large, and the construction cost and construction period are increased, which is not conducive to it is promoted and used; the cost is too high, and there is no specific application route after recycling, and a relatively complete industrial chain has not yet been formed. Therefore, in recent years, in addition to the increasing variety of retrievable anchors, the research on the anchoring mechanism has been increasing, and has achieved excellent results. Increase the application of the retrievable anchor in actual engineering, monitor the deformation of the recoverable anchor in a certain period of time, enhance the combination of production, study and research, and form a demonstration effect. In some projects, the recovery rate of the bolt body can reach 100%. Firstly, the research method of anchoring mechanism of pressure-dispersed anchors was described. Secondly, the pullable retrievable anchor, hot-melt retrievable anchor cable and mechanical recyclable were analyzed from the anchoring mechanism, and introduce its specific engineering application at home. Finally, the research pointed out the problems of the recoverable anchor, and looked forward to its future development direction.
邓友生, 蔡梦真, 王一雄, 苏家琳, 孙雅妮. 可回收锚件机理与工程应用研究[J]. 材料导报, 2019, 33(Z2): 473-479.
DENG Yousheng, CAI Mengzhen, WANG Yixiong, SU Jialin, SUN Yani. Research on Retrievable Anchor Mechanism and Its Engineering Application. Materials Reports, 2019, 33(Z2): 473-479.
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2019, Vol. 33 
