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| Control and repair technology for floor heave in roadways within deep high-stress fault fracture zones |
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Received:October 25, 2024
Revised:November 17, 2024
Accepted:November 18, 2024
Published Online:April 30, 2026
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| DOI：10.3969/j.issn.1005-7854.2025.06.009 |
| KeyWord:High-stress roadway;Fault fracture zone;Floor heave;Bearing structure;Load-bearing system |
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| 1.Huaibei Mining Co. Ltd., Huaibei 234111, Anhui, China;2.School of Civil Engineering and Architecture, Anhui University of Science and Technology, Huainan 232001, Anhui, China;3.State Key Laboratory of Mining Response and Disaster Prevention and Control in Deep Coal Mines, Anhui University of Science and Technology, Huainan 232001, Anhui, China |
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| Abstract: |
| In response to the challenge of controlling floor heave in deep high-stress roadways passing through fault fracture zones, this study takes the Ⅱ-5 pedestrian uphill roadway in Zhuxianzhuang Coal Mine as the engineering background. By integrating methods such as mineral detection, theoretical analysis, field investigation, and numerical simulation, the deformation and failure mechanisms of the surrounding rock were revealed. It was concluded that the main causes of severe floor heave are weak surrounding rock, high in-situ stress, unreasonable support design, and insufficient mobilization of the surrounding rock's bearing capacity. Based on these findings, a combined repair technique of "secondary anchor-mesh-cable-grouting+grouting-drainage-anchoring" was proposed. The rationality and reliability of this technique were verified through FLAC3D numerical simulation and field industrial trials. The results show that after repair, the surrounding rock deformation significantly improved, with the roadway height deformation controlled within 60 mm. The support system and surrounding rock together formed a stable load-bearing structure, ensuring long-term stability of the roadway. This repair approach provides a valuable reference for similar roadway engineering under analogous geological and stress conditions. |
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