A mechanics simulation test system of a roadway support under combined dynamic and static loads and a method therefor, the system comprising a similar material laying system (1), a hydraulic loading system (2), a power system (3), a monitoring system (4) and a control system (5); the similar material laying system (1) comprises a connection frame, a laying platform (12) and a reserved anchor bolt model (13); the laying platform (12) is placed at the interior of the connection frame, and the laying platform (12) is provided thereon with a coal and rock-like layer (14); the coal and rock-like layer (14) is composed of coal and rock-like materials that are laid in sequence in separate layers, and the reserved anchor bolt model (13) is disposed at a middle position of the coal and rock-like layer (14). The test system simultaneously applies a static load and dynamic load having an adjustable size to the coal and rock-like layer (14) such that the stress on rock surrounding the roadway and a support is consistent with actual on-site stress conditions, thereby enabling test results to be more accurate. Meanwhile, operation is simple, stable and reliable, and the test system has great significance in the supportive design of deep mines, tunnels and the like.
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