Dynamic damage characteristics and control mechanism of rocks anchored by constant resistance and energy absorption material

IF 13.7 1区工程技术 Q1 MINING & MINERAL PROCESSING International Journal of Mining Science and Technology Pub Date : 2025-01-01 DOI:10.1016/j.ijmst.2024.12.005

Bei Jiang , Kunbo Wu , Qi Wang , Yetai Wang , Wenrui Wu , Yaoxia Feng , Yanbo Zhang

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Abstract

With resource exploitation and engineering construction gradually going deeper, the surrounding rock dynamic disaster becomes frequent and violent. The anchorage support is a common control method of surrounding rock in underground engineering. To study the dynamic damage characteristics of anchored rock and the energy absorption control mechanism of dynamic disasters, a new type of constant resistance and energy absorption (CREA) material with high strength, high elongation and high energy absorption characteristics is developed. A contrast test of rockbursts in anchored rock with different support materials is conducted. The test results show that the surface damage rates and energy release degree of anchored rock with common bolt (CB) and CREA are lower than those of unanchored rock, respectively. The total energy, average energy and maximum energy released by CREA anchored rock are 30.9%, 94.3% and 84.4% lower than those of CB anchored rock. Compared with unanchored rock, the rockburst peak stress in the CREA anchored rock is increased by 39.9%, and the rockburst time is delayed by 53.2%. Based on the rockburst energy calculation model, the evolution law of rockburst peak stress and energy release is investigated. The control mechanism of CREA support units on rock dynamic failure is clarified.

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恒阻吸能材料锚固岩石动力损伤特性及控制机理

随着资源开发和工程建设的逐步深入，围岩动力灾害变得频繁和剧烈。锚固支护是地下工程中常用的围岩控制方法。为研究锚固岩体的动力损伤特性和动力灾害的吸能控制机理，研制了一种具有高强、高伸、高吸能特性的新型恒阻吸能材料。进行了不同支护材料锚固岩爆对比试验。试验结果表明，普通锚杆锚固岩石的表面损伤率和能量释放度均低于非锚固岩石；CREA锚固岩体释放的总能量、平均能量和最大能量分别比CB锚固岩体低30.9%、94.3%和84.4%。与无锚固岩石相比，CREA锚固岩石的岩爆峰值应力提高了39.9%，岩爆时间延迟了53.2%。基于岩爆能量计算模型，研究了岩爆峰值应力和能量释放的演化规律。阐明了CREA支护单元对岩石动力破坏的控制机理。

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来源期刊

International Journal of Mining Science and Technology Earth and Planetary Sciences-Geotechnical Engineering and Engineering Geology

CiteScore

19.10

自引率

11.90%

发文量

2541

审稿时长

44 days

期刊介绍： The International Journal of Mining Science and Technology, founded in 1990 as the Journal of China University of Mining and Technology, is a monthly English-language journal. It publishes original research papers and high-quality reviews that explore the latest advancements in theories, methodologies, and applications within the realm of mining sciences and technologies. The journal serves as an international exchange forum for readers and authors worldwide involved in mining sciences and technologies. All papers undergo a peer-review process and meticulous editing by specialists and authorities, with the entire submission-to-publication process conducted electronically.