Modeling Excavation Damaged Zone for Rock Mass Parameter Identification of Underground Engineering

Abstract:

Space-time effect of excavation damaged zone (EDZ) has great impact on identifying rock mass parameters in underground excavation engineering. In this paper, methods and models for simulating EDZ are reviewed and classified. Based on mechanism analysis, a practical model using radius-displacement-dependent deformation modulus is proposed for dynamic excavation feedback analysis. In the model, EDZ is viewed as a three dimensional heterogeneous and variable disturbing field of parameter during excavation process. Thus, deformation modulus of EDZ rock mass evolves with space-time change along with construction stages. The model is proved to be available in parameter identification for rapid feedback analysis of underground engineering.

• Periodical: Advanced Materials Research (Volumes 1065-1069)
• Pages: 437-441
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.1065-1069.437
• Online since: December 2014
• Authors: Hui Bo Liu, Zhi Guo Zhang*, Chan Ge Liu, Ming Xiao
• Keywords: Excavation Damaged Zone, Feedback Analysis, Numerical Simulation, Parameter Identification, Underground Engineering

References

[1] Bieniawski ZT. Determining rock mass deformability: experience from case histories[J]. International Journal of Rock Mechanics and Mining Sciences & Geomechanics Abstracts, 1978, 15(5): 237-247.

DOI: 10.1016/0148-9062(78)90956-7

[2] Martino JB. Chandler NA. Excavation-induced damage studies at the Underground Research Laboratory[J]. International Journal of Rock Mechanics and Mining Sciences, 2004, 41(8): 1413-1426.

DOI: 10.1016/j.ijrmms.2004.09.010

[3] GOLSHANI A, ODA M, OKUI Y, et al. Numerical simulation of the excavation damaged zone around an opening in brittle rock[J]. International Journal of Rock Mechanics and Mining Sciences. 2007, 44(6): 835-845.

DOI: 10.1016/j.ijrmms.2006.12.005

[4] DONG Zhi-hong, DING Xiu-li, LU Bo, et al. Displacement back analysis of rock mechanical parameters of large-scale underground powerhouse with unloading surrounding rockmass [J]. Rock and Soil Mechanics, 2008, 29(6): 2529-2534. ( in Chinese).

[5] Saiang D. Behaviour of blast-induced damaged zone around underground excavations in hard rock mass[D]. Sweden, Luleå: Luleå University of Technology, (2008).

[6] CHEN Guoqing, FENG Xiating, JIANG Quan. Study of dynamic early warning method of surrounding rock deformation monitoring for large underground powerhouse considering rock degradation[J]. Rock and Soil Mechanics, 2010, 31(9): 3012-3018. (in Chinese).

[7] CHEN Qiuhong, LI Zhongkui, ZHANG Zhizeng. Loosening zonal model and its application to back analysis of underground engineering [J]. Chinese Journal of Rock mechanics and Engineering，2010，29(supp. 1): 3216-3220. (in Chinese).

[8] Nawrocki P A and Dusseault M B. Modelling of damaged zones around openings using radius-dependent Young's modulus[J]. Rock Mechanics and Rock Engineering, 1995, 28(4): 227-239.

DOI: 10.1007/bf01020228

[9] LIU Huibo, XIAO Ming，ZHANG Zhingguo, et al. Displacement Back Analysis for Parameter Field Identification of Blast-Induced Excavation Damaged Zone around Openings Considering Spatial Effect[J]. Rock and Soil Mechanics, 2012, 33(7): 2132-2141. (in Chinese).