TY - GEN
T1 - Numerical study on the effect of confinement on thermal spallation drilling of hard rock
AU - Saksala, Timo
PY - 2020
Y1 - 2020
N2 - 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.
AB - 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.
U2 - 10.1088/1757-899X/789/1/012057
DO - 10.1088/1757-899X/789/1/012057
M3 - Conference contribution
VL - 789
T3 - IOP Conference Series: Materials Science and Engineering
BT - International Conference CIBv2019 Civil Engineering and Building Services 1-2 November 2019, Brașov, Romania
PB - IOP Publishing Ltd.
T2 - International Conference Civil Engineering and Building Services
Y2 - 1 November 2019 through 2 November 2019
ER -