Analysis of the Longitudinal-Bending-Torsional Coupled Vibration Mechanism of the Drilling of a Roof Bolter for Mine Support System

Figure 9

Vibration displacement responses to the drilling of roof bolter. (a) 2nd unit; (b) 3rd unit; (c) 4th unit; (d) 5th unit; (e) 6th unit; (f) 7th unit; and (g) 8th unit.

(a)

(b)

(c)

(d)

(e)

(f)

(g)