eprintid: 1301 rev_number: 16 eprint_status: archive userid: 2 dir: disk0/00/00/13/01 datestamp: 2015-02-26 15:15:22 lastmod: 2017-02-08 12:21:36 status_changed: 2015-04-27 12:10:38 type: article metadata_visibility: show creators_name: Jiang, Quan creators_name: Feng, Xia-Ting creators_name: Xiang, Tian-Bing creators_name: Su, Guo-Shao creators_id: qjiang@whrsm.ac.cn creators_id: xtfeng@whrsm.ac.cn creators_id: creators_id: corp_creators: State Key Laboratory of Geomechanics and Geotechnique Engineering, Institute of Rock and Soil Mechanics, Chinese Academy of Sciences, Wuhan 43007, China corp_creators: State Key Laboratory of Geomechanics and Geotechnique Engineering, Institute of Rock and Soil Mechanics, Chinese Academy of Sciences, Wuhan 43007, China corp_creators: State Key Laboratory of Geomechanics and Geotechnique Engineering, Institute of Rock and Soil Mechanics, Chinese Academy of Sciences, Wuhan 43007, China corp_creators: Department of Civil and Architecture Engineering, Guangxi University, Nanning 530004, China title: Rockburst characteristics and numerical simulation based on a new energy index: a case study of a tunnel at 2,500 m depth ispublished: pub subjects: GZ subjects: SS divisions: EPOS-P full_text_status: none abstract: Rockburst is one of the most difficult problems encountered in the pilot tunnels of the Jinping II hydropower station, where the rock cover is up to 2,500m. Some typical characteristics of the rockburst events are summarized. These events indicate the intrinsic reason of rockburst is energy release. In order to understand the outburst mechanism, a new energy index, the Local Energy Release Rate (LERR), is put forward to simulate the conditions causing rockburst. By tracking the peak and trough values of elastic strain energy intensity before and after brittle failure, the LERR was developed to help understand rockburst from the viewpoint of energy release. To test its reliability, the brittle breakage of Mine-by tunnel rock in Canada and two rock bursts in the Jinping pilot tunnels were simulated. The results showed that LERR can satisfactorily predict the intensity of a rockburst and the depth of the outburst pit. Although it is not yet possible to determine thresholds at which rockbursts will occur, the study indicates the potential of LERR for evaluating rockbursts in deep underground excavations. date: 2010-03-27 date_type: published publication: Bulletin of Engineering Geology and the Environment volume: 69 number: 3 publisher: Springer Verlag pagerange: 381-388 id_number: doi:10.1007/s10064-010-0275-1 refereed: TRUE issn: 1435-9529 official_url: http://dx.doi.org/10.1007/s10064-010-0275-1 access_IS-EPOS: limited owner: Publisher citation: Jiang, Quan and Feng, Xia-Ting and Xiang, Tian-Bing and Su, Guo-Shao (2010) Rockburst characteristics and numerical simulation based on a new energy index: a case study of a tunnel at 2,500 m depth. Bulletin of Engineering Geology and the Environment, 69 (3). pp. 381-388. DOI: https://doi.org/10.1007/s10064-010-0275-1