Karst pipeline filling medium high-pressure seepage instability failure test simulation device and method

The invention discloses a karst pipeline filling medium high-pressure seepage instability failure test simulation device and method.The karst pipeline filling medium high-pressure seepage instability failure test simulation device comprises a test cavity, an axial pressure loading device, a water pressure loading device, an information collecting and monitoring device and a muddy water protrusion collecting device, and a karst pipeline, filling medium and surrounding rock medium space is built in the test cavity; an upper flange plate is detachably connected to the top end of the test cavity, a through hole is formed in the position, facing the lower end of the karst pipeline, of the bottom of the test cavity, and a lower flange plate is detachably connected and covers the through hole of the test cavity in a sealing mode; and the muddy water protrusion collecting device is positioned below the through hole of the test cavity. The device is small in size, easy and convenient to operate and accurate in measure