Experimental device and experimental method for simulating burst type debris flow river blocking

The invention belongs to an experimental device for simulating river blocking by debris flow, and particularly relates to an experimental device and an experimental method for simulating main stream blocking by burst type debris flow. Comprising a reservoir, main and branch water tanks connected with the reservoir, a support and a fixed boundary. Wherein the gradient and the width of the main and branch water tanks are adjustable, the flow and the intersection angle of the main and branch water tanks are adjustable, and the number, the volume and the shape of the barrage bodies in the branch water tanks are controllable, so that the barrage body outburst, the debris flow movement evolution formed by the barrage body outburst and the main flow blocking process under different main and branch water tank conditions and different branch barrage body scenes can be more accurately simulated; the formation mechanism and the dynamic evolution mechanism of the burst type debris flow river-blocking disaster chain, espe