PRACTICAL EXPERIENCE AND RESEARCH OF STABILIZING THE UNDERGROUND WORKINGS UNDER DYNAMIC CONDITIONS

Resulted from worse geological condition and active ground pressure,the underground workings of Jinchuan Mine always suffer from unstability,especially when they are under dynamic condition of mining activities.Taking Phase Ⅱ engineering of No 2 mining area for example,the paper describes the engineering geological properties of workings wall rock and the regularity of ground pressure action,summarises the practical experience of achieving stability of workings.Reasons of serious deformation and damage of workings under dynamic mining condition are analysed.