Supercritical carbon dioxide leaking stoppage fracturing test system and application

The invention discloses a supercritical carbon dioxide leaking stoppage fracturing test system and application. The system comprises a supercritical carbon dioxide injection module, an alkali liquor injection module, a leaking stoppage fracturing module and a data acquisition module, the supercritical carbon dioxide injection module comprises a CO2 gas cylinder, a liquid CO2 generation pipeline and a fluid injection pipeline; the alkali liquor injection module comprises an alkali liquor storage container, an alkali liquor injection pipeline and a fluid injection pipeline; the leaking stoppage fracturing module is used for clamping a coal sample, loading axial pressure and confining pressure on the coal sample, and simulating a coal rock crustal stress condition; the liquid CO2 generation pipeline and the alkali liquor injection module are connected with a fluid injection pipeline and then connected with the leaking stoppage and fracturing module; and the data acquisition module analyzes and processes test dat