Top Hammer Drilling Tools

In shallow hole rock drilling, for blast holes with a diameter of less than 43 mm, H22 mm tapered drill rods and chisel-type, cross-type, or button bits are usually used; for blast holes with a diameter greater than 43 mm, use R32-H25-R32×1000 mm or R32-D32-R32×1000 mm extension rod, cross-type or button bit. In medium and deep hole rock drilling, R32-D32-R32×1100 mm, 1200 mm extension rods are mainly used, with diameters of 55 mm and 60 mm cross bits and button bits, and T38-D38-T38, T45-D45-T45x1525 mm extension rod and MF rod, with diameters of 64mm, 76 mm button bit.

Nowadays, people generally use full hydraulic rock drills for quarrying. The matching rock drilling tools mainly include the T38-D39-T38 structure with lengths of 1220mm, 1525 mm, 1830 mm extension rod, and MF rod, diameters of φ64mm, φ70mm, φ76 mm button bits; T45-D46-T45 structure with lengths of 1525 mm,1830mm extension rod, and MF rod, diameters of φ76 mm, φ89 mm button bits; T51-D52-T51 structure with lengths of 1830 mm extension rod, and MF rod, diameters of φ89 mm button bit, etc.

Nowadays, the development direction of rock drilling in tunnels and shafts is to use hydraulic rock drilling rigs, full-face tunnel boring machines and raise drilling rigs for mechanized construction. The main rock drilling tools used are R/T38-H35-R32 structure with lengths of 3090 mm, 3700 mm, 4310 mm, 5525 mm drill rods and diameters of φ45 mm, φ48 mm, φ51mm, φ54 mm with seven and nine tooth button bits, R32-H28-R28 structure with lengths of 2700 mm, 3050 mm drill rod for coal and rock roadway drill jumbo, diameters of φ41 mm, φ43 mm seven-tooth button bits, etc.

Commonly used top hammer rock drilling tools for hydropower projects include open-cutting drilling tools, etc.