Borehole Drill Bits

Drilling machine is divided into two categories, drill and drill, drill and open-air rig drilling and mining equipment of drill points.

1) drill: used in above medium hard rock Borehole Drill Bits drilling of 20 ~ 100 mm in diameter, depth within 20 meters of blast hole. According to their different can be divided into pneumatic power, diesel, hydraulic and electric drill, which is the most widely used pneumatic rock drill.

(2) the open-air rig: according to the features of broken work organization is different, divided into steel rope impact drill, DTH drill, rock drill and rotary drilling rig. Steel rope percussion drill because of low efficiency, has been gradually replaced by other drill.

(3) mining rig under drilling equipment, drill diameter less than 150 mm of mining blast hole drilling device, in addition to the application of rock drill can also be used in 80 ~ 150 mm small diameter DTH drill.

With axial pressure and rotary cutting tool for DHD Drill bit Po rolling effect, direct broken into lane or into mining drilling equipment in ore mechanical equipment. The knife has a disc cutter, wedge hob, ball hob and milling cutter. The roadway drivage according to the different, divided into day mining rig drill, vertical drilling rig equipment in mining and heading machine.

(1) day mining drilling rig equipment, specialized for drilling days slip mining mining drilling equipment and drilling equipment, mining drilling equipment operation, generally do not need to enter the day with a bit to drill pilot hole, first with the disc cutter of reamer reaming upwards.

(2) shaft mining drilling rig equipment specially used for a drilling equipment, drill into mining by the drilling tool system, rotary drilling, mining equipment, drilling tools hoisting system and circulating system.

(3) drift digging machine mining drilling equipment, it is the machinery such as rock and slag discharge process together and continuously into the digging of comprehensive mechanized equipment, mainly used for the engineering tunnel in soft coal roadway, mining and roadway drivage in ore-bearing rock of medium hardness above.

Half mechanization development of coal dth hammer bit mining operation has been developed from the '50 s to 80 s comprehensive mechanization. Comprehensive mechanized coal mining is widely used in shallow cut deep type double (single) joint of shearer drum or plough, flexible scraper conveyor and hydraulic pressure since the movable support equipment, such as the broken coal, coal mining working face, transport, supporting a comprehensive mechanization. Double-drum shearer is coal machinery. Motor by the cutting part reducer convey power to screw drum coal, the movement of the machine by the traction part by an electric motor drive to achieve. Drawing method basically has two kinds, namely chain and chain traction. Chain traction with the drawing part of the chain wheel and fixed in the transport chain on meshing and implementation.