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In situ dynamic monitoring of stress revolution with time and space under coal seam floor during longwall mining

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Abstract

In situ dynamic monitoring was used to obtain spatial and temporal strain and stress data in the floor strata during longwall mining at the no. 1604 working face in Nantun Coal Mine, China. The results reveal the presence of four stress stages distributed at four sections along the mining direction: weak response stage, significant increase stage, dramatic decrease stage, and slow restoration stage. Three vertical structural zones are identified under the excavation floor: (1) fracture zone, (2) deformation zone, and (3) lightly affected zone. Based on detailed analysis of the collected data, the relationship between the maximum vertical stress increment and depth is inversely exponential, whereas the relationship between the maximum horizontal stress increment and depth is linear. The monitoring results are conducive to determining the maximum depth of fracture zone under the coal seam floor and width of the significant stress increase stage, which are important factors in controlling groundwater inrush in operating coal mines.

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Acknowledgments

This research was financially supported by National Basic Research Program of China (973 Project, No. 2012CB723104), National Nature Science Foundation of China (Nos. 41372290 and 41402250), National Nature Science Foundation of Shandong Province (No. ZR2013EEQ 019). The authors would like to thank technicians in department of Geology and Survey in Nantun Coal Mine for their data collection and Mr. Sun S. Z. for his field work. Very sincere thanks to the anonymous reviewers who provided pertinent and effective recommendations and detailed revisions, this improved the manuscript.

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Authors and Affiliations

  1. State Key Laboratory of Mining Disaster Prevention and Control Co-founded by Shandong Province and the Ministry of Science and Technology, Shandong University of Science and Technology, Qingdao, Shandong, China

    Huiyong Yin & Jiuchuan Wei

  2. Shandong Provincial Key Laboratory of Depositional Mineralization and Sedimentary Minerals, College of Earth Science and Engineering, Shandong University of Science and Technology, Qingdao, Shandong, China

    Huiyong Yin, Jiuchuan Wei & Jianbin Guo

  3. College of Geoscience and Surveying Engineering, China University of Mining and Technology (Beijing), Beijing, China

    Huiyong Yin

  4. Department of Geology, Southern Illinois University, Carbondale, IL, USA

    Liliana Lefticariu

  5. Department of Resources and Civil Engineering, Shandong University of Science and Technology, Tai’an, Shandong, China

    Zhongjian Li

  6. Yanzhou Coal Co., Ltd, Jining, Shandong, China

    Yunzhang Guan

Authors
  1. Huiyong Yin
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  2. Liliana Lefticariu
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  3. Jiuchuan Wei
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  4. Jianbin Guo
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  5. Zhongjian Li
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  6. Yunzhang Guan
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Correspondence to Jiuchuan Wei.

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Yin, H., Lefticariu, L., Wei, J. et al. In situ dynamic monitoring of stress revolution with time and space under coal seam floor during longwall mining. Environ Earth Sci 75, 1249 (2016). https://doi.org/10.1007/s12665-016-6071-x

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  • DOI: https://doi.org/10.1007/s12665-016-6071-x

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