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Underground hard rock (metal/non-metal) mining
Published in A.J.S. (Sam) Spearing, Liqiang Ma, Cong-An Ma, Mine Design, Planning and Sustainable Exploitation in the Digital Age, 2023
A.J.S. (Sam) Spearing, Liqiang Ma, Cong-An Ma
Diamond drilling utilizes an annular diamond-impregnated drill bit attached to the end of hollow drill rods to cut a cylindrical core of solid rock. The diamonds used are fine to micro-fine industrial-grade diamonds. They are set within a matrix of varying hardness, from brass to high-grade steel. Matrix hardness, diamond size and concentration can be varied according to the rock which must be cut. Holes within the bit allow water to be delivered to the cutting face. This provides three essential functions: lubrication, cooling and removal of drill cuttings from the hole.
Mineral exploration
Published in Odwyn Jones, Mehrooz Aspandiar, Allison Dugdale, Neal Leggo, Ian Glacken, Bryan Smith, The Business of Mining, 2019
Odwyn Jones, Mehrooz Aspandiar, Allison Dugdale, Neal Leggo, Ian Glacken, Bryan Smith
Diamond drilling consists of a series of rods with a diamond-impregnated bit that produces a solid core of rock. The drill bit is lubricated with water or muds (special drilling fluids). The core barrel is subsequently winched to the surface at the end of each run.
A method to collect representative samples from water-driven percussion drilling techniques: examples from RoXplorer® coiled tubing drill rig
Published in Australian Journal of Earth Sciences, 2022
B. van der Hoek, F. Blaine, D. Giles, C. Tiddy, M. Mostofi, S. Soe
In MSDP15, the only samples that were flagged as contaminated by the drilling tools coincided with the mechanical failure of the tooling that introduced steel particles into the sample (Figure 13). The drill bit used in percussion drilling, as opposed to diamond drilling, does not have an erodible metallic matrix designed to expose fresh sharp diamonds while drilling and therefore does not have the associated metal contamination from the drill bit, as evidenced previously in diamond drilling (Uvarova et al., 2016). In comparison with conventional diamond drilling, there is also less potential contamination of samples by rod grease, which is typically metal-rich. In conventional drilling where rods are added to increase string length, grease is applied at every rod connection (Uvarova et al., 2016).