Numerical Modeling on the Fracturing and Energy Evolution of Large Deep Underground Openings Subjected to Dynamic Disturbance

Chun Yang, Keping Zhou, Zhichao Li, Xin Xiong, Yun Lin and Zengwu Luo
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Chun Yang: School of Resources and Safety Engineering, Central South University, Changsha 410083, China
Keping Zhou: School of Resources and Safety Engineering, Central South University, Changsha 410083, China
Zhichao Li: School of Resources and Safety Engineering, Central South University, Changsha 410083, China
Xin Xiong: School of Resources and Safety Engineering, Central South University, Changsha 410083, China
Yun Lin: School of Resources and Safety Engineering, Central South University, Changsha 410083, China
Zengwu Luo: Guangxi Gaofeng Mine Co. Ltd., Hechi 547205, China

Energies, 2020, vol. 13, issue 22, 1-18

Abstract: The exploitation of deep resources is necessary for human development. At the same time, high-stress environments that are deep underground bring about great challenges vis-à-vis resource exploitation. A large deep opening is sensitive to high ground stress, and is easily influenced by external interference, which can lead to geologically hazardous occurrences. To investigate the evolution of fracturing and energy in large, deep stopes subjected to dynamic loads, we established a numerical model of a stope in the Gaofeng mine. Using ANSYS/LS-DYNA software, we implemented an implicit solution to initial static stress and an explicit solution for dynamic analysis. Based on our numerical results, we obtained the fracture behavior and energy evolution under coupled static and dynamic loads. To determine the response of ground pressure to mining activity, a 24-channel microseismic monitoring system was designed for the Gaofeng mine based on the numerical analysis.

Keywords: fracture behavior; energy evolution; dynamic load; deep mine; strain energy density (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2020
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (1)

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