Dynamic crack leaking stoppage evaluation experiment device and experiment method

A dynamic crack leaking stoppage evaluation experiment device, characterized in that, the device comprises a crack simulation experiment instrument (1), a fluid reservoir tank (3), a recycle pool (4), a hydraulic pump (5), and a hand pump (6), a fluid weighting electronic balance (7), an inlet pressure gauge (8), an outlet pressure gauge (9), a first back pressure valve (10), and a second back pressure valve (400),

• an upper part of the crack simulation instrument (1) is provided with a fluid inlet (31) and a fluid outlet (32), and a bottom of the crack simulation instrument (1) is provided with a fluid seepage port (36);
• a fluid outlet of the fluid reservoir tank (3) is communicated with a fluid inlet of the hydraulic pump (5) through a pipeline, and a fluid outlet of the hydraulic pump (5) is communicated with a fluid inlet of the crack simulation instrument (1) through an input pipeline (310);
• the inlet pressure gauge (8) is provided on the input pipeline (310);
• a fluid outlet (32) of the crack simulation experiment instrument (1) is connected to upright an upper part of the recycle pool (4) through an output pipeline (320), and a fluid outlet end of the output pipeline (320) is provided with the first back pressure valve (10);
• the outlet pressure gauge (9) is provided on the output pipeline (320);
• the fluid seepage port (36) is provided with a drain pipe, on which the second back pressure valve (400) is provided;
• the fluid weighing electronic balance (7) is provided with a fluid weighing container which is arranged upright below an outlet of the drain pipe;
• the hand pump (6) is communicated with an air inlet (38) provided on a side wall of a cylinder body (21);
• when the hand pump (6) supplies a pressure to a annular space formed between a rubber sleeve (27) and the cylinder body (21), due to deformability of the rubber sleeve (27), the pressure input by the hand pump (6) can smoothly transfer to a rock-mass sample (11) to enable a radial pressure to be applied on the rock-mass sample (11).