| Autor: |
Dong Zhang, Jianbiao Bai, Rui Wang, Min Deng, Shui Yan, Qiancheng Zhu, Hao Fu |
| Jazyk: |
angličtina |
| Rok vydání: |
2025 |
| Předmět: |
|
| Zdroj: |
Underground Space, Vol 20, Iss , Pp 119-139 (2025) |
| Druh dokumentu: |
article |
| ISSN: |
2467-9674 |
| DOI: |
10.1016/j.undsp.2024.05.001 |
| Popis: |
The abandoned roadways (ARs) in front of the longwall face catastrophic instability will seriously hamper mining progress, which is a complicated process related to the stress environment, the roadway section, and the mechanical properties of the surrounding rock. The cusp catastrophe theory is employed to establish a state identification model for the irregular coal pillar-roof system (CPRS) formed by the ARs and re-mining entries. To begin, the state discrimination equation (Δp) for the gradual CPRS is derived, and the critical value at which the system transitions into an unstable state under quasi-static conditions is determined. The results indicated that when 16.49 m ≤ L ≤ 22.63 m (L denotes the equivalent span of the intersection roof) and 0 |
| Databáze: |
Directory of Open Access Journals |
| Externí odkaz: |
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