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Lessons Learned from the Landslides in Shengli East Open-Pit Mine and North Open-Pit Mine in Xilinhot City, Inner Mongolia Province, China

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Abstract

The locations of the 2013 eastern ShengLi open pit mine landslide and the 2010 northern ShengLi open pit mine landslide were both in the XilinHot city of Inner Mongolia province, in areas with similar geographical, regional geological, geomorphic conditions and excavation depth. There are so many similar characteristics, such as landslides triggered by the rain storms, landslides occurred many times, landslides with long time deformation, but there are also some differences between the two landslides, such as the scale and failure mode. Field investigations showed that the two landslides were both occurred several days after the rain storms, the eastern ShengLi open pit mine landslide body with the volume of 85 million m3 has been in persistent deformation with an observed maximum horizontal displacement of 58 m in August 2013, Furthermore the implemented check dams at east open pit mine had not formed an efficacious blocking system to resist the flow because of incorrect judgment regarding the landslide style. The northern ShengLi open pit mine landslide body with 0.5–1 million m3 occurred several times after each rain storm. In the whole, the time of persistent deformation about the eastern ShengLi open pit mine was much longer than that of the northern ShengLi open pit mine because of the difference of the filling material of fault and space combination between the faults and the slope. Field investigation, physical model experiments, real-time displacement monitoring and numerical simulation were implemented to investigate the characteristics, mechanism, and retaining measures of the two landslides. The insights gleaned herein may be valuable for the understanding of the mechanisms of landslides and improving preventative measures against these types of events in north China in the future.

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Acknowledgments

The work presented in this paper was supported by the National Natural Science Foundation of China (11302229), the 973 Program (2010CB731506), and the National Nature Science Foundation of China (51274185 and 51374196). The authors are grateful for the support. We would like to thank Yang Zhou and ZhiYong Fan for their field investigation and physical model experiment. We also thank GenLong Wang for his linguistic assistance during the preparation of this manuscript. Finally, we would like to thank the Editor-in-Chief and three anonymous reviewers for their valuable comments on an earlier draft of this paper.

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Correspondence to Fan Yongbo.

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Yongbo, F., Shihai, L., Yang, Z. et al. Lessons Learned from the Landslides in Shengli East Open-Pit Mine and North Open-Pit Mine in Xilinhot City, Inner Mongolia Province, China. Geotech Geol Eng 34, 425–435 (2016). https://doi.org/10.1007/s10706-015-9954-9

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