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Risk Assessment of Coal Floor Water Inrush from Underlying Aquifers Based on GRA–AHP and Its Application

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Abstract

Ground water inrush from underlying coal seam aquifers is a serious geohazard during coal mining in China. In order to effectively predict coal floor water inrush, the evaluation index system and evaluation standard for coal floor water inrush, containing quantitative indexes and qualitative indexes, is established on the base of conditions of aquifer and aquiclude, geologic structure and mining disturbance. Simultaneously, grey relational analysis and analytic hierarchy process are used to establish an evaluation model which efficiently overcomes the uncertainty between indexes of water inrush effects and really reflects the degree of importance for each index of water inrush effects. The model is applied to the typical working face of Yuzhou coalfield in the north of China to demonstrate the evaluation process. Compared to the water inrush coefficient method which is widely used for evaluating coal floor water inrush, the presented evaluation model in this paper accords more with the susceptibility of coal floor water inrush by multi-factor and is of nonlinear dynamic characteristics of highly complicated formation mechanism. This method offers a new tool in the assessment of ground water inrush in mine.

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Acknowledgments

This research was financially supported by China National Natural Science Foundation (Grant Nos. 41430318, 41272276), the China National Scientific and Technical Support Program (Grant Numbers 201105060-06, 2012BAB12B03), Guizhou Province Science and Technology Agency Foundation (qian ke he LH zi[2014]7617), Guizhou University Introducing Talents Research Foundation (2014-61).

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Authors and Affiliations

  1. Key Laboratory of Karst Environment and Geohazard Prevention, Ministry of Education, Guizhou University, Guiyang, 550000, Guizhou, China

    Bo Li

  2. College of Resource and Environmental Engineering, Guizhou University, Guiyang, 550000, Guizhou, China

    Bo Li

  3. Department of Civil Engineering, The University of Tokyo, Tokyo, 113-8656, Japan

    Yulong Chen

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  1. Bo Li
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  2. Yulong Chen
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Correspondence to Bo Li.

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Li, B., Chen, Y. Risk Assessment of Coal Floor Water Inrush from Underlying Aquifers Based on GRA–AHP and Its Application. Geotech Geol Eng 34, 143–154 (2016). https://doi.org/10.1007/s10706-015-9935-z

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  • DOI: https://doi.org/10.1007/s10706-015-9935-z

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