Application of Specific Energy in Evaluation of Geological Conditions Ahead of Tunnel Face
| Autor: | Sodai Ishizu, Jiankang Liu, Wei Han, Yujing Jiang, Osamu Sakaguchi, Hengjie Luan |
|---|---|
| Rok vydání: | 2020 |
| Předmět: |
Control and Optimization
0211 other engineering and technologies tunnel face Energy Engineering and Power Technology 02 engineering and technology 010502 geochemistry & geophysics lcsh:Technology 01 natural sciences specific energy tunnel deformation Mining engineering geological conditions Specific energy tunnel building Electrical and Electronic Engineering Rock mass classification Engineering (miscellaneous) 021101 geological & geomatics engineering 0105 earth and related environmental sciences Data processing Drilling rig lcsh:T buried depth Renewable Energy Sustainability and the Environment rock mass quality index Face (geometry) Reflection (physics) rock mass quality Geology Energy (miscellaneous) |
| Zdroj: | Energies Volume 13 Issue 4 Energies, Vol 13, Iss 4, p 909 (2020) |
| ISSN: | 1996-1073 |
| DOI: | 10.3390/en13040909 |
| Popis: | In underground construction, especially tunnel building, a detailed knowledge of the geological conditions ahead of the tunnel face is essential for both safety and efficiency of work. Many tunnel collapses have been reported to occur because of a lack of accurate evaluation of the geological conditions. While conventional horizontal boring conducted from a tunnel face provides good accuracy, it is infrequently conducted due to its high cost and time-consuming nature. In addition, the tunnel seismic reflection method has limited practicality owing to the complexity of data processing. This paper presents a new approach based on the specific energy of the mechanical drilling rig to evaluate the geological conditions ahead of the tunnel face. In order to assess the geological conditions, rock mass quality index, buried depth of the tunnel and tunnel deformation investigation were undertaken, and the obtained data were compared to the specific energy. Results from the comparison reveal the evaluation criterion that if the distribution of specific energy in some areas deviates from the distribution of buried depth, it is considered that abnormal geological conditions exist in this area. This work can greatly contribute to the accurate and effective evaluation of the geological conditions ahead of the tunnel face. Energies, 13(4), art.no.909; 2020 |
| Databáze: | OpenAIRE |
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