Fig. 2
From: Investigation on the long-term damage evolution of a strip coal pillar

The involved (a) coal samples and X-ray results (b) GCTS RIR 2000 rock mechanical testing system and (c) Loading platform.
From: Investigation on the long-term damage evolution of a strip coal pillar

The involved (a) coal samples and X-ray results (b) GCTS RIR 2000 rock mechanical testing system and (c) Loading platform.