In mine drilling operations, the durability of the drill bit directly affects the drilling efficiency and cost. Choosing a durable drill bit mainly considers its material, design and applicability. The following are some types of drill bits that perform well and have high durability in mine drilling:

  1. Carbide drill bits

   Carbide drill bits are widely used in mine drilling due to their high hardness and wear resistance. Carbide is composed of metals such as tungsten carbide and cobalt, which has extremely high hardness and wear resistance and can effectively resist the wear of rocks. This drill bit is suitable for medium-hard to hard rocks and is a common drill bit type for impact drills and rotary drills.

   2. Diamond drill bits

   Diamond drill bits perform well in drilling hard rock formations and highly abrasive rocks with their unparalleled hardness and wear resistance. Diamond drill bits are available in two types: natural diamond and synthetic diamond, of which synthetic diamond drill bits are more popular due to their cost-effectiveness and durability. Diamond drill bits are suitable for geological exploration drilling that requires high coring rate and drilling accuracy.

   3. Roller drill bits

   Roller drill bits (or rolling cutting drill bits) are commonly used for drilling operations in open-pit mines. They cut rock through rotating teeth and are suitable for efficient drilling of hard rock formations. The design of roller drill bits enables them to withstand high impact and wear and have a long service life.

  4. Polycrystalline Diamond Composite (PDC) Drill Bits

   PDC drill bits combine the hardness of diamond and the toughness of metal matrix, and are suitable for efficient drilling of soft to medium-hard rocks. PDC drill bits have a low coefficient of friction and high thermal stability, and can maintain high drilling speed and drilling quality in continuous drilling.

   Things to note when choosing a drill bit:

   ① Match the drill rig type: Make sure the drill bit type matches the way the drill rig is used (such as rotation or impact).

   ② Consider the rock type: Hard rock formations are suitable for carbide drill bits or diamond drill bits, while soft rock formations can use PDC drill bits.

   ③ Maintenance and replacement: Choose drill bits that are easy to maintain and replace to reduce downtime and maintenance costs.

   The final choice of drill bit needs to be considered comprehensively based on the specific drilling conditions, drilling objectives, and cost-effectiveness. If conditions permit, small-scale tests can be conducted to determine the most suitable drill bit type.