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Hazard degree identification and coupling analysis of the influencing factors on goafs

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Abstract

In China, there are a large number of mined-out area which bring a great hidden danger to the mine enterprise’s safety production and people’s life and property. Therefore, the stability evaluation and the mechanism analysis of goafs have become a hot issue in the study on sustainable development of mining industry. To solve the complexity, concealment, and uncertainty of goaf influencing factors, 14 factors, i.e., rock mass structure, goaf span, exposed area, and so on, were selected as the evaluation indexes according to an iron ore. Then, the hazard evaluation model of goaf was established by using the information entropy and the unascertained measurement (UM) theory to identify the hazard degree, and the hazard importance degree index was put forward by changing the influencing factors and its index value to quantitatively analyze the coupling degree of influencing factors. This paper takes the BFZ-8 goaf as an example to evaluate and analyze the goaf stability. The results show that the evaluation model about UM and the experimental schemes are feasible and practicability, and the UM evaluation grades are consistent with the fuzzy evaluation grades and the actual risk grades in the case of multi-factor coupling. And the experimental results quantitatively reflect the coupling degree of the influencing factors by comparing the relative change rate of the importance degree, and the coupling results are consistent with the actual situation. So, the method can guide the production safety of mine, protect life and property safety of miners, and provide technical support and a new method for hazard degree identification of the goaf.

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Acknowledgements

This work was funded by the National Natural Science Foundation of China (No. 41641036), the Project of Graduate Research and Innovation of Ordinary University in Jiangsu Province (No. CXZZ13_0936), and the NASS Key Laboratory of Land Environment and Disaster Monitoring (No. LEDM2014B04). The authors would also like to thank the anonymous reviewers for their comments and suggestions.

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Correspondence to Guang-li Guo.

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Xiao, Hp., Guo, Gl. & Liu, W. Hazard degree identification and coupling analysis of the influencing factors on goafs. Arab J Geosci 10, 68 (2017). https://doi.org/10.1007/s12517-017-2839-x

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