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Study on Monitoring Technology of Surrounding Rock in Deep Layered Roadway Based on Constant Resistance and Large Deformation Bolt

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Abstract

The stability monitoring of surrounding rock in layered roadway is an important method to ensure the safety of deep mining coal mine. In view of the actual situation of roadway stability monitoring, based on similarity theory, the deep roadway model is built and small-sized ordinary bolts and constant resistance and large deformation (CRLD) monitoring bolts are developed to detect the mechanical real-time information of surrounding rock in the model, the accurate measurement information of the displacement field and the force value of the bolts are obtained. According to the time series characteristics of the deformation field and the force curves of the monitoring bolts, the criterion of stability and instability pattern of surrounding rock in deep layered roadway are studied. The results show that the force monitoring method based on CRLD bolt is superior to displacement monitoring, the force monitoring curve of CRLD bolt can be divided into stable mode and instability mode, the characteristic of stable mode curve is rising slowly and the instability model with rapid rising and falling stages. The stability monitoring system of roadway with CRLD bolt is developed and applied in deep rock roadway, it has been proved by field practice that the early warning of surrounding rock instability of deep layered roadway is feasible.

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Data Availability

The data used to support the findings of this study are available from the corresponding author upon request.

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Acknowledgement

Financial support from the Young Fund of Scientific and technological research projects of higher education institutions in Hebei Province under grant No.QN2019183 and Ph. D foundation project of North China Institute of Aerospace Engineering under grant No.BKY-2018-21 and project for Young Top-Notch of langfang are gratefully acknowledged.

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Authors and Affiliations

  1. Construction Engineering Department, North China Institute of Aerospace Engineering, Langfang, 065000, China

    Dinggui Hou, Xinyu Zheng & Xu Fu

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  1. Dinggui Hou
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  2. Xinyu Zheng
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  3. Xu Fu
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Contributions

HOU Dinggui, the overall idea of the paper and the design of physical model experiment. ZHENG Xinyu, the numerical simulation. FU Xu, the experimental data analysis.

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Correspondence to Dinggui Hou.

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The authors declared that they have no conflicts of interest to this work.We declare that we do not have any commercial or associative interest that represents a conflict of interest in connection with the work submitted.

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Hou, D., Zheng, X. & Fu, X. Study on Monitoring Technology of Surrounding Rock in Deep Layered Roadway Based on Constant Resistance and Large Deformation Bolt. Geotech Geol Eng 39, 3903–3916 (2021). https://doi.org/10.1007/s10706-021-01735-w

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  • DOI: https://doi.org/10.1007/s10706-021-01735-w

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