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Abstract:Due to the constraints of construction period and site conditions, it is necessary to study the influence of construction of underlying tunnel on the surrounding rock of the existing tunnel-type anchorages. Through static excavation and dynamic blasting, this paper systematically analyzes the influence of underpass tunnel construction on the surrounding rock of the tunnel-type anchorages from the aspects of stress, deformation, plastic zone, velocity and loose circle of the surroundingdoi:10.1179/1432891715z.0000000001890 fatcat:cc7qjweieraopatvhaso76qw5a