Experimental and
statistical analysis on rate of penetration under the influence of rotational speed
for drilling limestone in the open cast mine area
Sarma Kaipa Venkata Subrahmanyam, Vardhan Harsha, Byra Reddy Raghunatha Reddy, Shanmugam
Bharath Kumar and Hanumanthappa Harish
Disaster Advances; Vol. 18(5); 163-169;
doi: https://doi.org/10.25303/185da1630169; (2025)
Abstract
In this study, an experimental investigation was carried out to study the rate of
penetration for drilling limestone in an open-cast mine. The investigation was also
carried out to study the influence of rotational speed. Drilling experiments were
carried out with a constant drilling depth of 10m and varying speeds of 40rpm, 45rpm
and 50rpm. As the drilling was carried out, the fresh drill bit caused an increase
in the rate of drilling penetration. Further, as it reached the optimal level, there
was a decrease in the rate of penetration due to the wearing out of the drill bit.
Further, the prediction of experimental results was carried out using the regression
analysis using linear and polynomial models. The results show that the polynomial
model was found to be in close relation with experimental results.
