Numerical and Preliminary In Situ Investigation on Roadway Excavation Using Static Expansion Mechanical Fracturing

<div>Mechanical excavation with piston splitter. (a) and (c) Cut hole and fracturing hole constructions at 770 m level and 926 m level; (b) and (d) static expansion mechanical fracturing results at 770 m level and 926 m level.</div>

Advances in Civil Engineering

fig15

Figure 15

Figure 15: Numerical and Preliminary In Situ Investigation on Roadway Excavation Using Static Expansion Mechanical Fracturing 