Risk Assessment for Coal Mining Under Sea Area
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This paper presents a case study of risk assessment for coal mining under sea area in the Beizao Coalmine, Shandong Province, China. The coalmine is facing the risk of sea water inrush hazards because most of its panels are under the Bohai Sea. To forecast water disaster, three important factors, including efficient aquifuge, water flowing fractured zone and the water pressure bearing capacity of aquifuge, are considered to assess the mining safety situation for Panel H2301 in the Beizao Coalmine. The efficient aquifuge is identified by lithological analysis and water chemical comparison between sea water and groundwater. The water flowing fractured zone under different mining conditions is obtained by statistically analyzing the field measurements and numerical simulation. The safety mining condition under the Bohai Sea is assessed and the upper mining limit of Panel H2303 has been proposed.
KeywordsUnderground coal mining Mining under sea area Risk assessment Upper mining limit Underground water inrush
The authors want to acknowledge the financial support of the National Natural Science Foundation—Shenhua Group Jointly Funded Project under grant No. 51174286. This research was also supported by A Project Funded by the Priority Academic Program Development of Jiangsu Higher Education Institutions and the Fundamental Research Funds for the Central Universities (No.2010QNB35).
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