The excavation disturbed zone (EDZ) at Kiirunavaara mine,Sweden—by seismic measurements |
| |
| Affiliation: | 1. LKAB R&D Department, Sweden;2. Division of Mining and Geotechnical Engineering-Rock Mechanics and Rock Engineering, Luleå University of Technology, Sweden;3. Division of Soil and Rock Mechanics, Royal Institute of Technology, Stockholm, Sweden;1. State Key Laboratory of Hydroscience and Engineering, Tsinghua University, Beijing 100084, China;2. School of Engineering and ICT, The University of Tasmania, Hobart TAS7001, Australia;3. Department of Hydraulic Engineering, Tsinghua University, Beijing 100084, China;1. School of Resources and Safety Engineering, Central South University, Changsha, Hunan, 410083, China;2. State Key Laboratory of Geohazard Prevention and Geoenvironment Protection, Chengdu University of Technology, Chengdu, Sichuan, 610059, China;1. University of Toronto, Canada;2. Itasca Consulting Group, Inc., Canada;3. Agnico Eagle Mines, Canada;1. Geomechanica Inc., 90 Adelaide Street West, Suite 300, M5H3V9 Toronto, ON, Canada;2. Department of Civil Engineering, University of Toronto, 35 St. George Street, M5S1A4 Toronto, ON, Canada;1. Research Center of Geotechnical and Structural Engineering, Shandong University, Jinan, China;2. School of Civil Engineering, Shandong University, Jinan, China;3. The Forth Research and Design Engineering Corporation of CNNC, Shijiazhuang 050021, China |
| |
| Abstract: | The presence of an excavation disturbed zone (EDZ) around an excavation boundary can significantly affect the overall performance of the excavation and the general safety of men and equipment. Hence, it has been an important subject of research in various rock excavation projects. The EDZ is generally defined as the rock zone beyond the excavation boundary where the physical, mechanical and hydraulic properties of the rock have been significantly affected due to the excavation and redistribution of stresses. For LKAB's Kiirunavaara underground iron ore mine in Sweden, the understanding of the EDZ is essential for optimal design of rock support. With this main objective an EDZ investigation was conducted at the mine using seismic measurement techniques. Cross-hole seismics and spectral analyses of surfaces waves (SASW) were the main techniques used. Borehole Image Processing Systems (BIPS) complemented the seismic measurements. The results show that an EDZ with a thickness of 0.5–1. 0 m existed behind the boundaries of the mining drifts being investigated. The magnitude of the Young's modulus of this zone was 50% to 90% of that of the undisturbed rock. |
| |
| Keywords: | |
| 本文献已被 ScienceDirect 等数据库收录！ |
|
