Abstract
In Tangshan mine, the oversize of coal pillar in the No. 12 coal seam panel causes serious deformation of roadway and failure of supporting body. Firstly, based on the limit equilibrium theory, the size of the narrow coal pillar is set as 8 m. Then, the range of the surrounding rock loosening circle is determined by using the borehole peeping instrument. Finally, the parameters of supporting system are determined by combining the composite arch and suspension theory. Based on the FLAC3D numerical simulation, the stress distribution of the surrounding rock of the roadway under the original and new support schemes is compared with the zero original rock stress. Therefore, the cross-combined support system of the “anchor bolt + anchor cable” is proposed. Two schemes are compared by measuring the surface displacement of the roadway. The comprehensive analysis shows that the combined support system of adjacent roadways in adjacent panels can more effectively control the deformation of roadway than the single support system of the original scheme.
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Acknowledgements
The authors gratefully acknowledge the support of the National Natural Science Foundation of Surface Project of China (No. 51774289), the National Natural Science Foundation of the Youth Science Foundation of China (No. 51404270), the Fundamental Research Funds for the Central Universities (2011QZ06).
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Wang, Z.Q., Shi, L., Wang, P. et al. Analysis of the Influence Law of Mining Disturbance on Roadway Stability: A Case Study. Geotech Geol Eng 38, 517–528 (2020). https://doi.org/10.1007/s10706-019-01042-5
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DOI: https://doi.org/10.1007/s10706-019-01042-5