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The Characteristics of Grout Diffusion in Reduce Subsidence Mining with Abscission Layer Grouting

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Abstract

The roof abscission layer formed by coal mining changes dynamically with the mining of working face. The grouting of abscission layer is an important engineering method to reduce ground subsidence and protect ground buildings. By using empirical formula prediction, numerical simulation and tracer test, the dynamic development characteristics of abscission layer, storage space of grouting grout, diffusion law of grout and its influence on groundwater were studied. The results show that the separation space mainly exists in the top of water-conducting fracture zone, which develops and closes with the mining of working face. The grout is mainly stored in the horizontal abscission layer. Grouting grout diffuses with mining-induced fissures and groundwater flow. Under the dilution and purification of stratum and groundwater, the influence of grouting on groundwater quality is basically eliminated after 20 years.

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Acknowledgements

This work was financially supported by the National Natural Science Foundation of China (Grant 51704161), National Science and Technology Major Project of China (Grants 2016ZX05043005 and 2016ZX05045007), and Innovation fund of Coal Mining & Designing Department, Tiandi Science and Technology Co., Ltd (KJ-KCQN-01 and KJ-KCQN-03), which are gratefully acknowledged. We also thank the anonymous reviewers for their comments and suggestions to improve the manuscript.

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Authors and Affiliations

  1. Coal Ming and Designing Department, Tiandi Science & Technology Co., Ltd., Beijing, 100013, China

    Zhenli Fan, Lutong Cao, Qiuge Yu, Qiuyang Zhao & Zhiwei Zhang

  2. China Coal Research Institute, Beijing, 100013, China

    Zhenli Fan, Lutong Cao, Qiuge Yu, Qiuyang Zhao & Zhiwei Zhang

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  1. Zhenli Fan
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  2. Lutong Cao
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  3. Qiuge Yu
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  4. Qiuyang Zhao
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Correspondence to Lutong Cao.

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Fan, Z., Cao, L., Yu, Q. et al. The Characteristics of Grout Diffusion in Reduce Subsidence Mining with Abscission Layer Grouting. Geotech Geol Eng 41, 553–575 (2023). https://doi.org/10.1007/s10706-022-02240-4

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  • DOI: https://doi.org/10.1007/s10706-022-02240-4

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