Abstract：For structural features of tilt layered roof in coal tunnel,it was established a mechanical model of simply supported beam from the tilt roof,and it was derived the roof deflection curve formula and the maximum subsidence location in the roof. The results show that tilt layered roof maximum subsidence location is not at the center line of the tunnel,but offsets to the tunnel lower side; the influence factors of roof deflection curve mainly include roof strata elastic modulus,bed thickness,roof key stratum position,tunnel width and roof tilt angle.The elastic modulus and bed thickness simply affect the roof subsidence,but hardly affect the maximum subsidence location. However,roof key stratum position,tunnel width and roof tilt angle have influences upon the roof subsidence and the maximum subsidence location. With the distance increasing between critical strata and the roof,the maximum subsidence location offsets to the center line of the tunnel. With the increasing of the tunnel width and roof tilt angle,the maximum subsidence location moves to the tunnel lower side. The theoretical results are validated by the measured results from the industrial test. In order to achieve a better roof deformation control,it is recommend that the central roof anchors location overall offset to the tunnel lower side 10 ~ 30 cm.

Keyword：coal tunnel;tilt roof;roof subsidence;the maximum subsidence location;