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Technical Note

Damage Characteristics and Mechanism of the 2017 Groundwater Inrush Accident That Occurred at Dongyu Coalmine in Taiyuan, Shanxi, China

School of Resources and Geosciences, China University of Mining and Technology, Xuzhou 221116, China
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Academic Editor: Giuseppe Sappa
Water 2021, 13(3), 368; https://doi.org/10.3390/w13030368
Received: 4 January 2021 / Revised: 26 January 2021 / Accepted: 27 January 2021 / Published: 31 January 2021
(This article belongs to the Special Issue Groundwater Sustainable Exploitation)
On 22 May 2017, a groundwater inrush accident occurred in the gob area of coal floor at Dongyu Coal Mine in Qingxu County, Shanxi Province, China. The water inrush accident caused great damage, among which six people died and the direct economic loss was about CNY 5.05 million. An elliptical permeable passage appeared at the floor of the water inrush point, and the lithology of the outburst is mainly fragmented sandy mudstone and siltstone of coal roof No.2 in the lower layer of coal seam No.3, which is currently being mined, with a peak inflow of 500 m3/h. The water inrush happened due to following reasons: There is an abandoned stagnant water-closed roadway in coal seam No.2, which is the lower mine group of coal seam No.3. The abandoned roadway of coal seam No.2 is an inclined roadway. The water level of the roadway far away from the accident point is higher than the floor elevation of coal seam No.3. Under the joint action of water pressure, mining disturbance, and weakening of goaf water immersion, the original equilibrium state was broken, resulting in the destruction of the only 7 m water-barrier rock pillar between coal seam No.3 and coal seam No.2. The water in the goaf led upward along the roof crack, gradually evolved from seepage to gushing water, and a large amount of goaf water poured into the roadway in the working face of the 03304 panel, finally leading to the occurrence of catastrophic water inrush. Technically, the miners did not implement the technical provisions of the coal mine water control regulations, leading to the accident. In addition, the failure to arrange evacuees to a safe location after apparent signs of water inrush also increased the catastrophic level of the accident. View Full-Text
Keywords: groundwater inrush; Dongyu coalmine; damage mechanism; goaf water accidents groundwater inrush; Dongyu coalmine; damage mechanism; goaf water accidents
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MDPI and ACS Style

Luo, B.; Sun, Y.; Xu, Z.; Chen, G.; Zhang, L.; Lu, W.; Zhao, X.; Yuan, H. Damage Characteristics and Mechanism of the 2017 Groundwater Inrush Accident That Occurred at Dongyu Coalmine in Taiyuan, Shanxi, China. Water 2021, 13, 368. https://doi.org/10.3390/w13030368

AMA Style

Luo B, Sun Y, Xu Z, Chen G, Zhang L, Lu W, Zhao X, Yuan H. Damage Characteristics and Mechanism of the 2017 Groundwater Inrush Accident That Occurred at Dongyu Coalmine in Taiyuan, Shanxi, China. Water. 2021; 13(3):368. https://doi.org/10.3390/w13030368

Chicago/Turabian Style

Luo, Bin, Yajun Sun, Zhimin Xu, Ge Chen, Li Zhang, Weining Lu, Xianming Zhao, and Huiqing Yuan. 2021. "Damage Characteristics and Mechanism of the 2017 Groundwater Inrush Accident That Occurred at Dongyu Coalmine in Taiyuan, Shanxi, China" Water 13, no. 3: 368. https://doi.org/10.3390/w13030368

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