Abstract: The pillar safety mining and goaf processing directly related to the sustainable development of mining and the safety of the staff.Based on the engineering geology of multi-metal mine of a mining area, the ultrasonic testing technology, exploration of many times under the surrounding rock blasting mining damage cumulative growth rule, the mechanical deformation of the surrounding rock under external loading condition is simulated by FLAC3D, mainly is the stress, strain and deformation of the displacement analysis of mine safety mining.The results have an important theoretical significance and application value.

Key words: Blasting vibration, Elastic modulus, Stress and strain, Pillar recovery