Abstract: Based on several rock-burst behaviors during tunneling of 9th return-air roadway in -1025 west downhill mining area，the activity rules of mining shock in the downhill pillar region are analyzed with SOS micro-seismic monitoring systemThe results indicate that the energy level continuously rises while the number of tremors level also increases or maintaines at a higher level before the rock-burst happens; Mine shock obviously concentrates along the downhill direction，and mainly distributed in two overlying key stratums and the high static stress and strong mining shock disturbance is the main reason for rock-burst; The rock-burst strong mining shock omen signal shows a low frequency and high amplitude characteristicsControlled weakening treatments of mining shock including large diameter borehole，floor pre-split blasting and optimized support methods are applied on the basis of monitoring results with good effects achieved in-site.

Key words: Deep downhill pillar region, Rock-burst, Activity rules of mining shock, Weakening and controlling