Common Failure Forms of Boring Drill Rod

The common failure modes of boring drill rods are respectively wear failure of R32 thread part, fracture of R32 thread root and fracture of the second buckle from R32 thread end face.

The common failure modes of boring drill rods are respectively wear failure of R32 thread part, fracture of R32 thread root and fracture of the second buckle from R32 thread end face. As shown in Figure 8, Figure 9, Figure 10. Bending and fracture of the shank of the drill rod and fracture of the tail end of the drill rod linked with the drill rod are rare. If abnormal conditions such as operation, surrounding rock change and drill rod are found, emphasis should be placed on analysis.

Figure 8 R32 thread wear failure

Fig. 9 R32 thread root fracture

Fig. 10 Fracture of the second buckle from R32 thread end face

Failure Analysis of Boring Drill Rod

Conical drill disloader

Failure Analysis of Boring Drill Rod

Conical drill disloader

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