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

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 i...

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Bibliographic Details
Published in:Rock mechanics and rock engineering 2018-06, Vol.51 (6), p.1863-1883
Main Authors: Wang, Hongwei, Xue, Sheng, Jiang, Yaodong, Deng, Daixin, Shi, Suzhen, Zhang, Dengqiang
Format: Article
Language:English
Subjects:
Civil Engineering
Coal
Coal mines
Coal mining
Deformation
Dredging
Driving
Earth and Environmental Science
Earth Sciences
Excavation
Field investigations
Field tests
Geological structures
Geophysics/Geodesy
Karst
Mining accidents & safety
Original Paper
Stress concentration
Structural damage
Underground mines
Underground roadways
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Summary: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.
ISSN:0723-2632
1434-453X
DOI:10.1007/s00603-018-1425-1