Abstract: Through similar experiment study, the stress transformation mechanism of slope rock mass in the mining process of resident ore-body was studied, and its slope stability was analyzed. The research showed that during open pit mining process, the horizontal strain tends to increase, and ground stresss unloads at open mined-out area; During the mining process of resident ore-body, the horizontal strain tends to decrease, the slope internal stress is redistributed, and the ground stress unloads at underground mined-out area. Stress concentration area is formed around underground mined-out area, which leads to decreasing of slope surface horizontal stress. But resident ore-body mining produces less impact on slope stability.

Key words: Resident ore body, Change mechanism, Similar experiments