Abstract
The surface displacement and deformation of goaf caused by coal mining destroy the underground rock structure and surface ecological environment in the mining area and endanger the safety of human life and property. An accurate and efficient dynamic prediction system of mining subsidence is indispensable. Given the limited scope of the application of the probability integral model on the edge of the mobile basin, its poor prediction effect, and its low accuracy, a new mining subsidence prediction model based on the Boltzmann function is proposed. Combined with the transformed normal distribution time function, a B-normal prediction model that can predict the dynamic displacement and deformation of any point on the surface was constructed. The global optimal solution of the parameters of the dynamic prediction model was inversed by introducing particle swarm optimization shuffled frog leaping intelligent algorithm (PSO-SFLA), and then, the model was applied to the 8102 working face of the Guobei coal mine to dynamically predict the subsidence, inclination, curvature, horizontal displacement, and horizontal deformation of the goaf surface. The prediction results showed that on the strike and dip observation lines, the prediction accuracy of the dynamic subsidence and horizontal displacement of the surface could reach the centimeter level, the predicted root mean square error (RMSE) of dynamic tilt and horizontal deformation was less than 0.51 mm/m, and the predicted RMSE of dynamic curvature was within 0.020 mm/m2. The prediction results reflected the dynamic evolution law of surface displacement and deformation and verified the reliability of the B-normal dynamic prediction model, which can fully meet the needs of practical engineering applications.
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Only publicly available datasets were used for the analysis.
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Acknowledgements
The authors thank the reviewers and the editor for their constructive comments.
Funding
This work is supported by the entrusted project of Huaibei Mining Co., Ltd.(2023-129) and the Fundamental Research Funds for the Central Universities (2022YJSDC22, 2022JCCXDC01).
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Xinming Ding and Keming Yang conceived and designed the research. Xinming Ding and Cheng Zhang performed analyses and interpretation of the results. Xinming Ding, Shuang Wang, Zhixian Hou, and Hengqian Zhao performed data collection and processing. The draft of the manuscript was written by Xinming Ding, and all authors commented on the previous versions of the manuscript. All authors gave final approval for publication.
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Ding, X., Yang, K., Zhang, C. et al. Dynamic prediction of displacement and deformation of any point on mining surface based on B-normal model. Environ Sci Pollut Res 30, 78569–78597 (2023). https://doi.org/10.1007/s11356-023-27532-x
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DOI: https://doi.org/10.1007/s11356-023-27532-x