Abstract：According to engineering geological and measurement data of Changcun colliery, the surface final subsidence, the dynamic subsidence and final horizontal movement characteristics of 2113 panel were analyzed in detail. Moreover, the reason of surface deformation abnormality under the condition of deep mining with thick overburden conglomerate was researched by mechanics. Then from subsidence speed variation law of the maximum subsidence point alone strike and engineering geological information, the relation between surface deformation and underground rock burst was deduced, and the angle parameters attributing surface movement and deformation was determined. The results show that through a whole surveying period the surface is in the state of gradual subsidence due to key-stratum. Furthermore, a subsidence mutational-point is no existing during surface subsidence. Therefore, the increase of surface subsidence speed could be dangerous prediction information for rock burst; the movement of overburden thick conglomerate is one of main powers which may cause colliery earthquake.

Keyword：deep mining;conglomerate;mining subsidence;subsidence law;rock burst;