Hydromechanical Simulation of Tunnel Excavation in Rock Considering a Nearby Karst Cave

Figure 2

The cave location in 6 different working conditions. (a) Working condition 1. (b) Working condition 2. (c) Working condition 3. (d) Working condition 4. (e) Working condition 5. (f) Working condition 6.

(a)

(b)

(c)

(d)

(e)

(f)