Disk cutter drilling performance and optimization methods, rock strength correlation and field data analysis ...

• Main Author: Mafazy, Salum
• Format: Text
• Language: English
• Published: Memorial University of Newfoundland 2023
• Subjects: Baie Verte; Canada; Verte; Newfoundland
• Online Access: https://dx.doi.org/10.48336/ayt9-ps93; https://research.library.mun.ca/15853/

Drilling a rock near the ground surface has an increasing demand for natural resources exploration, such as the recovery of minerals or crushed rock, the application of tunneling in civil engineering, etc. A recent field mine drilling at Baie Verte, located in the North of Newfoundland, Canada, involved a diamond drilling hole (DDH) for core recovery, which was intended for lithology analysis and as a pilot hole and a large diameter hole drilling (LDH) for ore excavation. This thesis includes an investigation of mining drilling on the LDH to determine abnormal drilling low rate of penetration (ROP) performance at a specific depth interval, where drilling data was analyzed based on each lithology. Also rock material characterization was conducted on granite rock to introduce a new method of Semi-Point Load Strength Index (Semi-PLSI) for estimation of the rock strength, and a detailed analysis of the effect of microwave irradiation on rock properties as one of the influencing technology of an increasing ROP. ...