In the mining process of mines, different mines have different mining operations requirements, so what are the ways of rock drilling in mines? Wide-angle rock drilling, medium-deep hole jack drilling and deep holes are widely used. DTH drilling and other methods. Let me introduce it below.
Shallow-hole rock drilling refers to the drilling of blastholes with a diameter of 34 to 42 mm and a hole depth of less than 5 m. The blasthole is drilled mainly by a pneumatic leg rock drill and an upward rock drill . Shallow-eye rock drilling, mainly used for roadway excavation, thin ore body mining and mining, patio excavation and installation of anchors. Its main tools are drill pipes and bits. Drill pipe, also known Qianzai, a rock breaking tool of the rock drill, produce hollow hexagonal carbon alloy steel, and impact action is responsible for transmitting rotary motion to the rock drilling machine, the rock breaking; direct breaking rock drill bit, its shape and material It has a great influence on the rock drilling speed. Usually, the bit body is made of high-quality carbon tool steel and alloy steel, and the blade is welded with a sheet-like or columnar cemented carbide to improve the service life.
The medium-deep hole refers to a blasthole with a hole diameter of 45 to 50 mm or more and a hole depth of about 15 m.
In underground mining, the jack-type rock drilling method is used, that is, several drill rods are used, and as the rock drilling deepens, the length of the drilling is continued until the designed drilling depth is reached; in the open pit mine, the down-hole drilling rig is often used.
The deep hole refers to a blasthole having a hole diameter of 45 to 50 mm or more and a hole depth of 15 m or more. At this stage, the deep hole drilling equipment (QZJ-100B, YQl00A) is mainly a down-the-hole drilling rig ; the deep hole perforation of the open pit mine mainly uses a down-the-hole drilling rig and a cone drilling machine.
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