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Abstract
Excessive or insufficient support strength causes safety hazards and economic waste in underground engineering. Addressing this requires precise sensing of variations in surrounding rock conditions. This study, based on roof anchor drilling, analyzes the full drilling process and posture, establishing a theoretical link between drilling parameters and uniaxial compressive strength. A rock property detection system was developed for specific engineering environments. Results show that in V-N mode, rock strength increases, with thrust and torque rising by 310.67% and 106.92%, respectively. In F-N mode, drilling speed decreases by 71.08%, and torque varies by 10.75%, indicating limited torque sensitivity to strength. Theoretical validation indicates that the prediction error range for rock strength under the V-N model is between 3.01% and 20.30%, with an average error rate of 10.43%. The study also examines the assumptions’ validity, F-N mode limitations, and the engineering significance of theoretical derivations, offering new insights into rock strength measurement.
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