REV Application in DEM Analysis of Non-Vibrational Rock Splitting Method to Propose Feasible Borehole Spacing
| Autor: | Hankyu Yoo, Turab H. Jafri |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2018 |
| Předmět: |
representative elementary volume
modulus ratio 0211 other engineering and technologies Borehole Modulus 02 engineering and technology Noise (electronics) lcsh:Technology 020501 mining & metallurgy Physics::Geophysics lcsh:Chemistry General Materials Science Geotechnical engineering discrete element method Instrumentation lcsh:QH301-705.5 021101 geological & geomatics engineering non-vibrational rock splitting method unconfined compressive strength (UCS) borehole spacing borehole depth Fluid Flow and Transfer Processes Computer simulation lcsh:T Process Chemistry and Technology Numerical analysis General Engineering Discrete element method lcsh:QC1-999 Computer Science Applications Vibration 0205 materials engineering lcsh:Biology (General) lcsh:QD1-999 lcsh:TA1-2040 Representative elementary volume lcsh:Engineering (General). Civil engineering (General) Geology lcsh:Physics |
| Zdroj: | Applied Sciences, Vol 8, Iss 3, p 335 (2018) Applied Sciences; Volume 8; Issue 3; Pages: 335 |
| ISSN: | 2076-3417 |
| Popis: | Most of the tunnel excavation methods involve the use of explosion and vibration techniques that is not feasible in urban areas due to unavoidable production of noise, vibration, and dust. The environmental considerations of tunneling projects in urban areas demand the use of excavation methods in which minimum noise, vibration, and dust is produced. In this study, non-vibrational rock splitting method is introduced that involves the fragmentation of rock segments using a split-wedge system inserted into already drilled boreholes. The main objective of this study is the investigation of important parameters involved in the non-vibrational rock splitting method for improving its efficiency. Discrete element analysis of this method was performed using Particle Flow Code (PFC2D) and the concept of Representative Elementary Volume (REV) was used to simulate intact rocks based on their unconfined compressive strength and modulus ratio concept. Maximum borehole spacing values were obtained using the numerical simulation of rock splitting process in intact rocks. The numerical analysis results show that increased borehole spacing values can be used for all intact rock types in cases of average modulus ratio and high modulus ratio and also that decreasing the borehole depth generally results in the use of increased borehole spacing. |
| Databáze: | OpenAIRE |
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