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Field Investigation of a Roof Fall Accident and Large Roadway Deformation Under Geologically Complex Conditions in an Underground Coal Mine

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Abstract

An investigation was undertaken to study the characteristics of large roadway deformation and driving force of roof fall in a geologically complex zone at Huangyanhui underground coal mine, Shanxi Province, China, and to determine the main factors contributing to a roof fall accident that occurred in this mine. A series of field tests were conducted in the mine to study the geological structures, in situ stress, excavation-damaged zones of the roadway, roof-to-floor and sidewall convergences, roof separation, bolts loading and island coal pillar stress. The results of these tests have revealed that the driving force of the large roadway deformation and roof fall was not the activation of the karst collapsed pillars or concentration stress in island coal pillar, but high levels of horizontal tectonic stress and fault slip were induced by mining activities.

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Acknowledgements

This research was financially supported by the State Key Research Development Program of China (2016YFC0801401), the National Natural Science Foundation of China (41502184), the Beijing Natural Science Foundation (2164067), the State Key Laboratory for Geomechanics and Deep Underground Engineering, China University of Mining & Technology in Beijing (SKLGDUEK1722) and the Excellent Talent Training (2016000020124G115).

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Authors and Affiliations

  1. School of Mechanics and Civil Engineering, China University of Mining and Technology, Beijing, 100083, China

    Hongwei Wang, Yaodong Jiang, Daixin Deng & Dengqiang Zhang

  2. State Key Laboratory for GeoMechanics and Deep Underground Engineering, China University of Mining and Technology, Beijing, 100083, China

    Hongwei Wang

  3. Anhui University of Science and Technology, Huainan, 232002, China

    Sheng Xue

  4. State Key Laboratory of Coal Resources and Safe Mining, Beijing, China University of Mining and Technology, Beijing, 100083, China

    Yaodong Jiang & Suzhen Shi

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  1. Hongwei Wang
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  2. Sheng Xue
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  3. Yaodong Jiang
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  4. Daixin Deng
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  5. Suzhen Shi
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  6. Dengqiang Zhang
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Correspondence to Hongwei Wang.

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Wang, H., Xue, S., Jiang, Y. et al. Field Investigation of a Roof Fall Accident and Large Roadway Deformation Under Geologically Complex Conditions in an Underground Coal Mine. Rock Mech Rock Eng 51, 1863–1883 (2018). https://doi.org/10.1007/s00603-018-1425-1

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  • DOI: https://doi.org/10.1007/s00603-018-1425-1

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