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http://dx.doi.org/10.9720/kseg.2021.3.295

Numerical Analysis of Railway Roadbed Stability with Respect to Underground Cavities and Rock Condition: A Case Study of Shafts at Majang Mine  

Jang, Kyunghwan (Department of Railroad System Engineering, Woosong University)
Lee, Dongwon (Sejong E&C Co., Ltd.)
Min, Kyungnam (Sejong E&C Co., Ltd.)
Chung, Chanmook (Department of Railroad System Engineering, Woosong University)
Yu, Jaehyung (Department of Geological Sciences, Chungnam National University)
Lee, Gyeseung (Department of Railroad System Engineering, Woosong University)
Publication Information
The Journal of Engineering Geology / v.31, no.3, 2021 , pp. 295-306 More about this Journal
Abstract
This study used numerical modeling to investigate the stability of railway roadbed in areas with various underground cavities and rock conditions associated with mining activities. It compared combined loads from both passenger and freight trains with loads from only passenger trains. Stability was assessed with reference to the Korean government standards for railway subsidence allowance and railway warping repair. Sufficient stability regarding the railway subsidence allowance standard was not achieved when cavities were at depths of <5 m. The criteria for requiring railway warping repair were met when cavities were at depths of <15 m, depending on the rock fracture condition. This study provides the first report on systematic analysis land subsidence related to cavity size and rock fracture conditions associated with mining activities. We expect that this study could serve as an important reference for railway construction in mining areas.
Keywords
underground cavity; mining; stability assessment; subsidence allowance standard;
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