Model Test Study on Overburden Failure and Fracture Evolution Characteristics of Deep Stope with Variable Length

<div>Plane model diagram of working face with variable length (unit: cm). (a) Forward knife handle working face. (b) Reverse knife handle working face.</div>

Advances in Civil Engineering

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Figure 2

Figure 2: Model Test Study on Overburden Failure and Fracture Evolution Characteristics of Deep Stope with Variable Length 