Back Analysis for Rock Mechanical Parameters and Calculation of Ground Stress Based on GA-FLAC3D

Abstract:

In order to obtain the stress distribution in deep level of Datai mine, a nonlinear back analysis method for rock mechanical parameters was proposed by combining genetic algorithm and FLAC3D (GA-FLAC3D). First the hollow inclusion stress gauge (stress relieving method) was used to complete the measurement of local in-situ stress; and then the rock mechanical parameters were obtained by using back analysis; at last the ground stress in deep level was obtained. The results showed, this method is quick in calculation, and has global convergence. The convergence accuracy of normal stress is about 90%.

• Periodical: Advanced Materials Research (Volume 462)
• Pages: 468-473
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.462.468
• Online since: February 2012
• Authors: Ze Zhang, Tong Bin Zhao, Yun Liang Tan, Chong Guang Zhang
• Keywords: Back Analysis, FLAC-3D, GA, Genetic Algorithm (GA), In Situ Stress Measurement

References

[1] Tongbin Zhao: Research on back-analysis of roadway displacement based on genetic algorithms. Shandong University of Science and Technology, (2004).

[2] Shouju Li: Prameter indentification procedures in geotechnical engineering with computational inelligences and their applications. Dalian university of technology, (2004).

[3] Yuanwen Liang, Hongmei Lin, Wenbin Pan: Three-dimensional back analysis analysis of ground stress field based on BP neural network. GX water resources & hydropower engineering, Apr 2004, pp.5-8.

[4] Zhongming Jiang, Weiya Xu, Jianfu Shao: ANN-Based 3-D Back Analysis of Initial Stress in Rock Mass, Journal of Hehai University (Natural Sciences), Vol. 30, May 2002, pp.52-56.

[5] Tongbin Zhao, Yunliang Tan, Yuming Zhang, et al: Invertibility evaluation of back-analysis of roadway displacement, Journal of Mining & Safety Engineering, Vol. 23, Feb. 2006, pp.107-109.

[6] Lan Qi： Research on systems analysis methodology for initial in-situ stress field, Tianjin: Tianjin University, (2002).

[7] Bin Chen： Study and application on random inverse analysis in geomechanical engineering, Nanjing Jiangsu: Hohai University, (2001).

[8] Amadei B： Stephenson O, Rock stress and its measurenment, London: Chapman & Hall, (1997).

[9] Da Yi, Shenghong Chen, Xiurun Ge： A methodology combining genetic algorithm and finite element method for back analysis of initial stress field of rock masses, Rock and Soil Mechanics, Vol. 25, Jul. 2004, pp.1077-1080.