Indoor stimulation test system for carbon dioxide blast cracking of hot dry rock

摘要

#$%^&*AU2020100250A420200326.pdf#####ABSTRACT The present invention provides an indoor stimulation test system for carbon dioxide blast cracking of a hot dry rock. The system includes a carbon dioxide pressurizing and filling 5 module, an acoustic emission module and a physical blasting module. The carbon dioxide pressurizing and filling module includes a carbon dioxide storage tank, a gas compressor and a pressurizing pump which are successively connected; the acoustic emission module includes a plurality of acoustic emission probes; the physical blasting module includes a carbon dioxide liquid storage tube, an activator, a shearing piece and a sample placing room; the 0 acoustic emission probes are arranged in the sample placing room; samples are placed in the sample placing room; one end of the carbon dioxide liquid storage tube is connected with the pressurizing pump and the other end thereof is connected with the sample placing room; the carbon dioxide liquid storage tube stores carbon dioxide liquid, and the activator is arranged in the carbon dioxide liquid storage tube; the shearing piece is arranged in the carbon dioxide 5 liquid storage tube; and the carbon dioxide liquid absorbs thermal energy and then rapidly gasifies, with a volume expanded to generate a high pressure to break the shearing piece, and after the shearing piece is broken, high-energy carbon dioxide gas acts on the samples, so that the samples generate cracks.4 9 17 63 61 8 62 1 64 Fig. I 10 62 Fig. 2