Seismic imaging of rock mass responses to excavation |
| |
| Affiliation: | 1. Applied Seismology and Rock Physics Laboratory, Department of Geology, Keele University, Staffs S75 5BG, U.K.;1. Institute of Mechanics, Chinese Academy of Sciences, Beijing 100190, China;2. Changqing Downhole Technology Company, Chuangqing Drilling Engineering Co., Ltd, CNPC, Xi''an 710018, China;1. State Key Laboratory of Disaster Reduction in Civil Engineering, College of Civil Engineering, Tongji University, Shanghai 200092, China;2. Institute of Structural Mechanics, Bauhaus University Weimar, Marienstr. 15, 99425 Weimar, Germany;1. BGC Engineering Inc., 980 Howe Street, Vancouver, V6Z 0C8 BC, Canada;2. Royal Institute of Technology, Brinellv. 23, SE-100 44 Stockholm, Sweden;1. Centre for Rock Instability and Seismicity Research, School of Civil Engineering, Dalian University of Technology, Dalian, Liaoning 116024, PR China;2. School of Mining Engineering, University of New South Wales, Sydney, New South Wales, Australia;3. School of Mining Engineering, Liaoning University of Science and Technology Liaoning, Anshan, Liaoning 114051, PR China |
| |
| Abstract: | Three case studies are presented which illustrate rock mass characterization using a combination of tomographic images of spatial variation in seismic p-wave velocity with induced seismicity. In the controlled case of a tunnel excavation, known stress changes and fracturing were successfully mapped using velocity images and the location of induced seismicity. Within a stabilizing pillar in a deep South African gold mine, an active-source velocity image resolved the location of stress concentrations ahead of the mining face, and fracturing around the stope. Velocity images of pre-existing, seismically active faults were also computed by simultaneously inverting the induced seismicity data for velocity structure and hypocentral location. The resulting velocity image was interpreted in terms of the expected deformation and seismic potential along the faults. The potential role of velocity imaging and induced seismicity in validating geomechanical models is discussed, along with a possible strategy for incorporating the technique into an integrated geomechanical investigation of induced seismicity. |
| |
| Keywords: | |
| 本文献已被 ScienceDirect 等数据库收录！ |
|
