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Mine drilling machine
In order to save energy and reduce consumption in mines, in addition to overall planning for the development of mine resources, advanced and applicable mining technologies, processes and equipment should be constantly promoted, especially to reduce the energy consumption of large energy users such as blasting and perforating operations.
Features
In order to save energy and reduce consumption in mines, in addition to overall planning for the development of mine resources, advanced and applicable mining technologies, processes and equipment should be constantly promoted, especially to reduce the energy consumption of large energy users such as blasting and perforating operations. For the drilling hole is larger, the step is deeper, especially the geological conditions are more complex mine, the rig configuration should be preferred integrated type, hydraulic drive, drilling rig, if the mine has good power conditions, priority is given to the use of electric integrated hydraulic drilling rig.
Mine drilling machine
The method of mechanical rock breaking drilling:
impact rotary rock breaking drilling;
Rotary rock breaking drilling;
Rotary - impact combined rock breaking drilling
Impact type
When drilling in hard rock, it is an effective method to break the rock by impact charging.
When the impact hammer with a certain mass impacts the brazing metal at the speed V, the compressive stress wave generated by the tail of the brazing metal propagates to the wedge bit, and the compressive stress wave acts on the rock at the bottom of the hole through the bit head, so that the rock is broken and a groove I- is formed. Before the second impact of the impact hammer, the brazing metal is rotated at an Angle, and the second impact makes the groove of the rock broken fall on another position I-H. If continuous impact and rotation, and continuous discharge of rock debris, will form a round hole.
Rotary type
Rotary multi-edge cutting is an effective method for drilling in rocks with low abrasive and below medium hard.
The rotary drilling process is that the drill bit continuously rotates and cuts the rock under a certain axial pressure P, so that its drilling edge is advanced in a spiral, and the broken rock powder is discharged out of the hole to form a circular gun hole.
Rotary drilling is generally divided into full section of the gun hole cutting rock drilling and core cutting ring rock drilling.
Rotary impact
The drill sends the cone bit to the bottom of the hole through the drill pipe, under the action of the drill pipe, and by pressurizing the drill pipe, the drill bit contacts the bottom of the hole, and under the action of rotating the drill pipe, the cone with teeth (ball teeth or chisel teeth) on the drill bit rolls, and transmits the impact and pressing force through the hobbing, so that the rock is broken. Because the rolling track of the cone cone is a circular surface, the drill pipe is constantly rotating at the same time, and then the broken rock debris is continuously discharged out of the hole, and the gun hole can be formed.
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