caa a22 4500 605454345 CHVBK 20210128100206.0 cr unu---uuuuu 210128e20151101xx s 000 0 eng 10.1007/s10064-014-0696-3 doi (NATIONALLICENCE)springer-10.1007/s10064-014-0696-3 Analysis of rockburst mechanisms induced by structural planes in deep tunnels [Elektronische Daten] [Hui Zhou, Fanzhen Meng, Chuanqing Zhang, Dawei Hu, Fanjie Yang, Jingjing Lu] A rockburst is defined as damage to an excavation in a sudden or violent manner, frequently occurring during the excavation of civil engineering tunnels and deep-level mining. Small-scale structural planes in the vicinity of tunnels have been found to play an important role in controlling certain rockbursts in the deeply buried tunnels of the Jinping-II Hydropower Station. In order to study the mechanisms of bursts related to the structural plane, four typical examples were selected to illustrate the temporal and spatial characteristics of the burst and the exposed plane. Three types of rockbursts were classified based on these examples and on a preliminary analysis of the various mechanisms—namely, fault-slip burst, shear rupture burst, and buckling burst. Model experiments using cement mortar revealed three failure mechanisms of the structural plane under shear stress: slip dislocation of the asperities, tensile failure of the footwall and hanging wall initiated from the root of the asperities, and impact fracture of the front end of the hanging wall and back end of the footwall. These mechanisms are used to explain the development processes of fault-slip and shear rupture bursts. Analysis of the source mechanisms of buckling bursts caused by structural planes is also provided, and three proposed source mechanisms are put forth to illustrate the factors that may have triggered the buckling bursts: self-adjustment and accumulation, disturbance from machine or blasting excavation, and energy input from remote seismic sources. Issues that must be addressed in the future are outlined and discussed in the final section. The research results contribute to a mechanistic understanding of and control method for structure-type rockbursts in deep hard-rock tunnels. Springer-Verlag Berlin Heidelberg, 2014 Rockburst nationallicence Structural plane nationallicence Mechanisms nationallicence Deeply buried tunnels nationallicence Zhou Hui State Key Laboratory of Geomechanics and Geotechnical Engineering, Institute of Rock and Soil Mechanics, Chinese Academy of Sciences, 430071, Wuhan, Hubei, China aut Meng Fanzhen State Key Laboratory of Geomechanics and Geotechnical Engineering, Institute of Rock and Soil Mechanics, Chinese Academy of Sciences, 430071, Wuhan, Hubei, China aut Zhang Chuanqing State Key Laboratory of Geomechanics and Geotechnical Engineering, Institute of Rock and Soil Mechanics, Chinese Academy of Sciences, 430071, Wuhan, Hubei, China aut Hu Dawei State Key Laboratory of Geomechanics and Geotechnical Engineering, Institute of Rock and Soil Mechanics, Chinese Academy of Sciences, 430071, Wuhan, Hubei, China aut Yang Fanjie State Key Laboratory of Geomechanics and Geotechnical Engineering, Institute of Rock and Soil Mechanics, Chinese Academy of Sciences, 430071, Wuhan, Hubei, China aut Lu Jingjing State Key Laboratory of Geomechanics and Geotechnical Engineering, Institute of Rock and Soil Mechanics, Chinese Academy of Sciences, 430071, Wuhan, Hubei, China aut Bulletin of Engineering Geology and the Environment Springer Berlin Heidelberg 74/4(2015-11-01), 1435-1451 1435-9529 74:4<1435 2015 74 10064 https://doi.org/10.1007/s10064-014-0696-3 text/html Onlinezugriff via DOI BK010053 XK010053 XK010000 Metadata rights reserved Springer special CC-BY-NC licence nationallicence 1 research-article jats NATIONALLICENCE NATIONALLICENCE NL-springer NATIONALLICENCE 856 40 https://doi.org/10.1007/s10064-014-0696-3 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Zhou Hui State Key Laboratory of Geomechanics and Geotechnical Engineering, Institute of Rock and Soil Mechanics, Chinese Academy of Sciences, 430071, Wuhan, Hubei, China aut NATIONALLICENCE 700 1- Meng Fanzhen State Key Laboratory of Geomechanics and Geotechnical Engineering, Institute of Rock and Soil Mechanics, Chinese Academy of Sciences, 430071, Wuhan, Hubei, China aut NATIONALLICENCE 700 1- Zhang Chuanqing State Key Laboratory of Geomechanics and Geotechnical Engineering, Institute of Rock and Soil Mechanics, Chinese Academy of Sciences, 430071, Wuhan, Hubei, China aut NATIONALLICENCE 700 1- Hu Dawei State Key Laboratory of Geomechanics and Geotechnical Engineering, Institute of Rock and Soil Mechanics, Chinese Academy of Sciences, 430071, Wuhan, Hubei, China aut NATIONALLICENCE 700 1- Yang Fanjie State Key Laboratory of Geomechanics and Geotechnical Engineering, Institute of Rock and Soil Mechanics, Chinese Academy of Sciences, 430071, Wuhan, Hubei, China aut NATIONALLICENCE 700 1- Lu Jingjing State Key Laboratory of Geomechanics and Geotechnical Engineering, Institute of Rock and Soil Mechanics, Chinese Academy of Sciences, 430071, Wuhan, Hubei, China aut NATIONALLICENCE 773 0- Bulletin of Engineering Geology and the Environment Springer Berlin Heidelberg 74/4(2015-11-01), 1435-1451 1435-9529 74:4<1435 2015 74 10064