Numerical study on the effect of confinement on thermal spallation drilling of hard rock
Tutkimustuotos › › vertaisarvioitu
Yksityiskohdat
| Alkuperäiskieli | Englanti |
|---|---|
| Otsikko | International Conference CIBv2019 Civil Engineering and Building Services 1-2 November 2019, Brașov, Romania |
| Kustantaja | IOP Publishing Ltd. |
| Sivumäärä | 8 |
| Vuosikerta | 789 |
| DOI - pysyväislinkit | |
| Tila | Julkaistu - 2020 |
| OKM-julkaisutyyppi | A4 Artikkeli konferenssijulkaisussa |
| Tapahtuma | International Conference Civil Engineering and Building Services - Kesto: 1 marraskuuta 2019 → 2 marraskuuta 2019 |
Julkaisusarja
| Nimi | IOP Conference Series: Materials Science and Engineering |
|---|---|
| Vuosikerta | 789 |
| ISSN (elektroninen) | 1757-899X |
Conference
| Conference | International Conference Civil Engineering and Building Services |
|---|---|
| Ajanjakso | 1/11/19 → 2/11/19 |
Tiivistelmä
This paper presents a numerical study on the effect of confining pressure (down-to-hole pressure) on the performance of the thermal jet drilling on rock. For this end, a numerical method including a viscoplastic-damage model for rock and an explicit scheme for solving the governing thermo-mechanical problem, which is assumed uncoupled. Moreover, rock heterogeneity, which facilitates the thermal spallation phenomenon, is taken into account. Numerical simulations under axisymmetric conditions demonstrate that the efficiency of thermal spallation based drilling is reduces drastically due to confinement.