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has been cited by the following article:

• TITLE: Evaluation of Stope Stability in Underground Mine; Hermyingyi (Sn-W Deposit) Mine in Myanmar

  AUTHORS: Cho Thae Oo, Takashi Sasaoka, Hideki Shimada, Akihiro Hamanaka, Tun Naing, Dyson Moses

  KEYWORDS: Sn-W Deposit, Stress Ratio, Open Stope, Cut-and-Fill Stope, FLAC3D Simulation

  JOURNAL NAME: Journal of Geoscience and Environment Protection, Vol.9 No.1, January 29, 2021

  ABSTRACT: The stability of underground excavations has become an important issue in order to extend underground mining operations and extract deeper deposits. The increasing demand for Tin-Tungsten (Sn-W) for industry and its market price has created a motivation for mining companies to extract deep-seated Sn-W ore deposits in Myanmar. Thus, this paper aims to investigate the stability of underground openings, especially, the stope with considering the mining methods. To meet the objective, FLAC3D 5.0 simulation was used for the assessment of stope under different stress ratios, 0.5, 1.0, and 1.5 for two types of underground mines; Open stoping and Cut and Fill stoping. The results show that the risk of instability of stope is high under the stress ratio of K = 0.5 than that of K = 1.0 and K = 1.5 in both mining methods. However, the stability of the stope in open stope method is lower than that of cut-and-fill method obviously. This result shows that the appropriate mining method has to be selected for extraction of Sn-W deposit carefully in terms of the balance of safety and cost.