In-situ observations of damage-fracture evolution in surrounding rock upon unloading in 2400-m-deep tunnels

Jiang, 2017, In situ experimental investigation of basalt spalling in a large underground powerhouse cavern, Tunn Undergr Space Technol, 68, 82, 10.1016/j.tust.2017.05.020 Chen, 2021, Microbiologically influenced corrosion of cable bolts in underground coal mines: The effect of Acidithiobacillus ferrooxidans, Int J Min Sci Technol, 31, 357, 10.1016/j.ijmst.2021.01.006 Jiang, 2020, 97, 103237 Feng, 2023, Special issue on new advances in acoustic emission and microseismic monitoring technologies in civil engineering, Appl Sci, 13, 969, 10.3390/app13020969 Xu, 2022, local homogenization approach for simulating the reinforcement effect of the fully grouted bolt in deep underground openings, Int J Min Sci Technol, 32, 247, 10.1016/j.ijmst.2022.01.003 Read, 2004, 20 years of excavation response studies at AECL's Underground Research Laboratory, Int J Rock Mech Min Sci, 41, 1251, 10.1016/j.ijrmms.2004.09.012 Cai, 2004, Generalized crack initiation and crack damage stress thresholds of brittle rock masses near underground excavations, Int J Rock Mech Min Sci, 41, 833, 10.1016/j.ijrmms.2004.02.001 Kwon, 2009, An investigation of the excavation damaged zone at the KAERI underground research tunnel, Tunn Undergr Space Technol, 24, 1, 10.1016/j.tust.2008.01.004 Wassermann, 2011, Characterization and monitoring of the excavation damaged zone in fractured gneisses of the Roselend tunnel, French Alps Tectonophysics, 503, 155, 10.1016/j.tecto.2010.10.013 Yan, 2015, Contributions of in situ stress transient redistribution to blasting excavation damage zone of deep tunnels, Rock Mech Rock Eng, 48, 715, 10.1007/s00603-014-0571-3 Feng, 2017, Deep fracturing of the hard rock surrounding a large underground cavern subjected to high geostress: In situ observation and mechanism analysis, Rock Mech Rock Eng, 50, 2155, 10.1007/s00603-017-1220-4 Zhang, 2018, Field measurement and numerical simulation of excavation damaged zone in a 2000 m-deep cavern, Geomech Eng, 16, 399 Adams, 1980, Petroscopic observations of rock fracturing ahead of stope faces in deep-level gold mines, J S Afr I Min Metall, 80, 204 Shemyakin, 1986, Zonal disintegration of rocks around underground workings, Part 1: Data of in situ observations, Sov Min, 22, 157, 10.1007/BF02500863 Feng, 2018, In situ observation and evaluation of zonal disintegration affected by existing fractures in deep hard rock tunneling, Eng Geol, 242, 1, 10.1016/j.enggeo.2018.05.019 Xu, 2017, Comprehensive evaluation of excavation-damaged zones in the deep underground Caverns of the Houziyan hydropower station, Southwest China Bull Eng Geol Environ, 76, 275, 10.1007/s10064-016-0858-6 Yang, 2021, New crack initiation model for open-flawed rock masses under compression-shear stress, Theor Appl Fract Mech, 116, 10.1016/j.tafmec.2021.103114 Guo, 2017, Evaluation of the integrity of deep rock masses using results of digital borehole televiewers, Rock Mech Rock Eng, 50, 1371, 10.1007/s00603-017-1173-7 Zhou, 2013, Excavation-induced zonal disintegration of the surrounding rock around a deep circular tunnel considering unloading effect, Int J Rock Mech Min Sci, 64, 246, 10.1016/j.ijrmms.2013.08.010 Zhang, 2019, Deformation damage and energy evolution characteristics of coal at different depths, Rock Mech Rock Eng, 52, 1491, 10.1007/s00603-018-1555-5 Li, 2012, In situ monitoring of rockburst nucleation and evolution in the deeply buried tunnels of Jinping II hydropower station, Eng Geol, 137–138, 85, 10.1016/j.enggeo.2012.03.010 Feng, 2015, A microseismic method for dynamic warning of rockburst development processes in tunnels, Rock Mech Rock Eng, 48, 2061, 10.1007/s00603-014-0689-3