NUMERICAL SIMULATION OF EXCAVATION PROCESS OF DONGPING MINE WORKED OUT AREA BASED ON 3D-FINITE ELEMENT METHOD

Combining the practical project of NanShan No.1 worked out area of Dong ping Gold Mine,the 3D finite element method was used to simulate the excavation process.The stress and displacement changing regulations are analyzed and the appropriate excavation sequence is selected.The damage zones and stress concentrating zones of surrounding rock are revealed.The results prove the sequence from above to below is better,and the excavated cavern is basically stable,but it also has potential dangers.Which has guiding meaning to kept safety production of the mine.