Abstract
This paper presents a water inrush evaluation model based on the theory of floor water resisting key strata. The mechanical model of the water resisting key strata was constructed by the thin plate theory. The Mohr-Coulomb strength criterion was adopted to construct the water inrush risk index (WIRI) model. Taking the Yangcheng coal mine as the research area, the water inrush risk was evaluated based on the specific parameters of the panel. In addition, the sensitivity analysis was performed on 12 parameters in the evaluation model. The results show that the coordinates of the maximum deflection of the water resisting key strata is (0.5a, 0.583b), and the water inrush risk area is distributed at the line of the maximum deflection located. It is close to the position along the groove below the working face, with a higher water inrush risk; the sensitivity sequence of parameters in the WIRI model is: hk > b > P0 > φ > a > Hm > c > μ > α > γ > E > h. This study can provide a theoretical basis for safe coal mining on confined water.
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All authors contributed to the study conception and design. Material preparation, data collection and analysis were performed by Xiangxi Meng and Yuben Liu. The first draft of the manuscript was written by Qiang Li and all authors commented on previous versions of the manuscript. All authors read and approved the final manuscript.
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Communicated by: H. Babaie
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Li, Q., Meng, X. & Liu, Y. Sensitivity analysis of water inrush evaluation model based on the theory of water resistant key strata: a case study in a coal mine, China. Earth Sci Inform 15, 2481–2494 (2022). https://doi.org/10.1007/s12145-022-00851-2
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DOI: https://doi.org/10.1007/s12145-022-00851-2