Abstract: In order to reveal the combined effects of ice coating and ground deformation on mining area transmission line system, a study on the unbalanced tension, vertical reaction force, rod stress of transmission tower under ice coating and ground deformation is carried out by the finite element model based on the law of ground deformation in subsidence trough. When the system is under 20mm ice coating, the results show that (1) with the value of maximum subsidence increasing, distal vertical reaction force increases, proximal vertical reaction force become into rally from pressure; (2) with the value of maximum subsidence increasing, the bottom main rod stress change more obvious than upper main rod; (3) when the tower is at the maximum tilt point, the system is under the most unfavorable condition.

Key words: subsidence trough, ground deformation, power transmission tower, ice coating