broken wall rock

charging method of wall rock

Coal-rock Interface

coal-rock interface recognition

Crane beam anchored on rock wall

CRANE BEAM ON ROCK WALL

Crushed wall-rock

crushing in the wall rock

discriminance of wall rock’s balance

displacement of wall rock

inclusion of wall rock

interlaid rock wall

Loose wall rock

MIDDLE ROCK WALL

middle-rock wall

mortar-rock interface of anchorage

oil rock interface

pile-rock interface

red clay wall rock