The instability of extraction structure under the undercut space in the block caving stope presents specific characteristics: rib spalling and floor heave in ore-loading roadway and collapse of major apexes. In order to study the stress and displacement evolution law of extraction structure under undercut space and reveal the instability mechanism of extraction structure. the numerica... https://www.jmannino.com/super-value-NFL-Atlanta-Falcons-Team-Jersey-PS5-Digital-Edition-Bundle-Skin-p121054-great-pick/