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http://dx.doi.org/10.7474/TUS.2020.30.2.109

A Case Analysis on the Spalling Evaluation of the Deep Rock Mass and Pillar Spalling Modeling  

Park, Seunghun (Dept. of Energy Resource Engineering, Inha University)
Kwon, Sangki (Dept. of Energy Resource Engineering, Inha University)
Lee, Changsoo (Radioactive Waste Disposal Research Division, Korea Atomic Energy Research Institute)
Lee, Jaewon (Radioactive Waste Disposal Research Division, Korea Atomic Energy Research Institute)
Yoon, Seok (Radioactive Waste Disposal Research Division, Korea Atomic Energy Research Institute)
Kim, Geon-Young (Radioactive Waste Disposal Research Division, Korea Atomic Energy Research Institute)
Publication Information
Tunnel and Underground Space / v.30, no.2, 2020 , pp. 109-135 More about this Journal
Abstract
Globally, the deepening depth in the underground is a situation of the high interest for a purpose of the development of various facilities. The development of deep underground space should be based on the structural stability of rocks. Spalling is known to have an impact on the structural stability degradation in deep underground space. As an attempt to predict spalling, many researchers have proposed predicted conditions in accordance with stress states which occur around the tunnel, rock conditions, and types of rock. In addition, the analysis on spalling method has been verified by using computer modeling such as FLAC, EXAMINE, Insight 2D, UDEC and FRACOD, along with in-situ measurement results. In Canada URL (Underground Research Tunnel), CWFS model (Cohesion Weakening Frictional Strengthening) was used to precisely predict for the state of spalling, comparing spalling modeling. CWFS model has been identified as a reliable method for predicting such phenomena. This study aims to analyze several cases of spalling, and then make a comparison between the conditions for spalling occurrence and the predicted results of model CWFS. With this, it investigates the applicability of prediction of spalling, targeting pillar under deep depth condition.
Keywords
Deep underground space; Spalling; Computer modeling; CWFS; Pillar;
Citations & Related Records
Times Cited By KSCI : 1  (Citation Analysis)
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