Nonlinear Elastic Foundation Plate Model Study on Overlying Strata Movement in Working Face with Solid Backfilling Mining
| Autor: | Dong Zhang, Baifu An, Nailu Li, Qiaomei Yi, Hailong Wang |
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| Jazyk: | angličtina |
| Rok vydání: | 2021 |
| Předmět: |
Article Subject
Mechanical Engineering Physics QC1-999 Linear elasticity Compaction Foundation (engineering) Geotechnical Engineering and Engineering Geology Condensed Matter Physics Stress (mechanics) Nonlinear system Mechanics of Materials Deflection (engineering) Geotechnical engineering Deformation (engineering) Roof Geology Civil and Structural Engineering |
| Zdroj: | Shock and Vibration, Vol 2021 (2021) |
| ISSN: | 1875-9203 1070-9622 |
| Popis: | Although solid backfilling materials are featured with obvious nonlinear stress-strain properties, for a long time, they have been usually simplified as linear elastic materials for approximate calculation in mechanical analysis, so it is difficult to accurately reflect their deformation process. Based on test results of solid backfilling materials’ compaction characteristics, this paper provides a solution method to generate their elastic foundation coefficient. One multiparameter elastic foundation has been used to reflect stress-strain characteristics of solid backfilling material. In addition, the paper establishes a thin plate on a nonlinear elastic foundation model by adopting semianalytical and seminumerical method and obtains the relational expression between roof deflection, roof stress, and backfilling material’s compressive deformation. In combination with geological conditions in a specific mine, the paper probes into what influence both backfilling material’s particle size and the initial compaction force that the backfilling material bears could exert on roof subsidence and stress. Finally, the proposed model has been verified with measured data from industrial tests. |
| Databáze: | OpenAIRE |
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