Mechanical properties of rocks anchored by constant resistance energy-absorbing material

Anchoring support using bolts and cables works together with rock masses to form an integrated anchoring system and jointly resists the energy released by dynamic disasters. The strength and elongation of traditional support are often insufficient, causing anchoring system failure when withstanding dynamic disasters. Constant resistance energy-absorbing (CREA) material is a new type of support material with high strength and large elongation. To understand the mechanical properties of this new material and its anchoring system, we carried out static tensile and dynamic impact tests on the CREA anchoring material. Subsequently, the SHPB impact tests were carried out on rocks anchored by CREA, MG335, and MG500 anchoring materials. The deformation and failure characteristics of anchored rocks under high-speed impact were studied. Compared with MG335 and MG500 anchored rocks, the peak stress of the CREA anchored rock is increased by 42.2% and 63.9%, and the absorbed energy is increased by 42.0% and 63.2%. The CREA supporting technology can enhance the bearing capacity and energy-absorbing capacity of the anchored rock under dynamic impacts. Finally, we propose engineering suggestions to anchored rocks using the CREA supporting technology under strong disturbance and carry out a field application in a deep burst-prone coal mine.