In Situ Stress Measurement and Inversion in Deep Roadway

Abstract:

Jixi mine area is one of the early mined areas in China and it's a typical deep mine. Because of large deformation of underground roadway and dynamic disasters occurred frequently in this mine, five measurement points of in-situ stress in this mine was measured and then analyzed with inversion. Based on these in-situ stress measurement data, numerical model of 3D in-situ stress back analysis was established. According to different stress fields, related analytical samples of neural network were given with FLAC program. Through the determination of hidden layers, hidden nodes and the setting of parameters, the network was optimized and trained. Then according to field measurement of in-situ stress, back analysis of initial stress field was conducted. Compared with field measurement, with accuracy requirement satisfied, it shows that the in-situ stress of rock mass obtained is basically reasonable. Meanwhile, it proves that the measurement of in-situ stress can provide deep mines with effective and rapid means, and also provide reliable data to optimization of deep roadway layout and supporting design.

• Periodical: Advanced Materials Research (Volumes 734-737)
• Pages: 759-763
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.734-737.759
• Online since: August 2013
• Authors: Yong Li, Yun Yi Zhang, Ren Jie Gao, Shuai Tao Xie
• Keywords: Artificial Neural Network (ANN), Back Analysis, Deep Mining, In Situ Stress Measurement

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