Show me the process with a specific case such as iron ore , copper ore, gold ore , etc.
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Many drillers adopt their chosen method of both hole-making and hole clearing and become experts over time. Long and successful careers are had by working within the method of drilling/hole clearing chosen. These drillers indentify themselves by their chosen methods: "cable tool driller" "mud rotary driller" "environmental/geotechnical driller."
Mechanical hole making methods:
Cable tool:
For a cable tool drill to operate the drill string must have these four components:drilling cable - swivel socket - drill stem - drill bit
Auger drilling:
Often used for site investigation, environmental and geotechnical drilling and sampling, auger drilling can be an efficient drilling method.
Rotary Drilling:
Rotary drilling uses a shap, rotating drill bit to dig down through the Earth's crust. Much like a common hand held drill, the spinning of the drill bit allows for penetration of even the hardest rock. The idea of using a rotary drill bit is not new.
Using a platform, the shotfirers charged the holes with explosives and electronic detonators then initiated the blast. The bottom row of holes would be the first part of the sequence to be detonated; this was to ensure there was sufficient clearance at the face for the remaining rock to fall as a pile, and not to project outward of the tunnel.
Mechanical hole making methods:
Cable tool:
For a cable tool drill to operate the drill string must have these four components:drilling cable - swivel socket - drill stem - drill bit
Auger drilling:
Often used for site investigation, environmental and geotechnical drilling and sampling, auger drilling can be an efficient drilling method.
Rotary Drilling:
Rotary drilling uses a shap, rotating drill bit to dig down through the Earth's crust. Much like a common hand held drill, the spinning of the drill bit allows for penetration of even the hardest rock. The idea of using a rotary drill bit is not new.
Using a platform, the shotfirers charged the holes with explosives and electronic detonators then initiated the blast. The bottom row of holes would be the first part of the sequence to be detonated; this was to ensure there was sufficient clearance at the face for the remaining rock to fall as a pile, and not to project outward of the tunnel.