دورية أكاديمية
Investigation on the Failure Mechanism of Weak Floors in Deep and High-Stress Roadway and the Corresponding Control Technology
| العنوان: | Investigation on the Failure Mechanism of Weak Floors in Deep and High-Stress Roadway and the Corresponding Control Technology |
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| المؤلفون: | Dong Zhang, Jianbiao Bai, Shuai Yan, Rui Wang, Ningkang Meng, Gongyuan Wang |
| المصدر: | Minerals, Vol 11, Iss 12, p 1408 (2021) |
| بيانات النشر: | MDPI AG, 2021. |
| سنة النشر: | 2021 |
| المجموعة: | LCC:Mineralogy |
| مصطلحات موضوعية: | high stress, floor burst, inverted arch, full-section anchor cable, combined support, Mineralogy, QE351-399.2 |
| الوصف: | Large deformation of roadway and floor burst are the two major geotechnical hazards encountered with high mining stress in deep mines. In this paper, the stress and energy conditions generated by the impact damage on the rock surrounding a roadway are analyzed, and UDEC software was used to study the deformation characteristics of the roadway, as well as its failure mechanism under the influence of superimposed dynamic and static loads. The results indicate that the soft floor of a deep-buried roadway has a high damage degree and an obvious stress release effect, high static load leads to slow floor heave, and strong dynamic load disturbance is the principal trigger leading to floor burst. In addition, the anisotropy caused by the bedding surface weakens the cooperative characteristics of the support system, resulting in serious instability of the whole rock surrounding the roadway. Full-section anchor cables and inverted arches were adopted to maintain the stability of the rock surrounding the roadway. The monitoring results obtained from field tests show that the adoption of the combined support system effectively avoids floor burst caused by the superposition of dynamic and static loads; the maximum floor heave is 67.9 mm, which is 95% lower than the original value, ensuring safety in coal mining operations. |
| نوع الوثيقة: | article |
| وصف الملف: | electronic resource |
| اللغة: | English |
| تدمد: | 11121408 2075-163X |
| Relation: | https://www.mdpi.com/2075-163X/11/12/1408; https://doaj.org/toc/2075-163X |
| DOI: | 10.3390/min11121408 |
| URL الوصول: | https://doaj.org/article/0469188e4bae40a6b256b5210369ca1c |
| رقم الأكسشن: | edsdoj.0469188e4bae40a6b256b5210369ca1c |
| قاعدة البيانات: | Directory of Open Access Journals |
Full Text Finder | تدمد: | 11121408 2075163X |
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| DOI: | 10.3390/min11121408 |