Confining pressure hydrofracture experimental facility

The utility model discloses a confining pressure hydrofracture experimental facility, and relates to a sample. The confining pressure hydrofracture experimental facility comprises a confining pressure device and an acquisition device for acquiring information, relevant to an event, generated when the event of the sample occurs. The confining pressure device comprises a bearing shaft, an end cover, a cavity, an exhaust valve, a first water injection valve, a second water injection valve, a third water injection valve, a vacuum valve, a pressure transformer, a water pump and a water injection pipe, wherein the end cover and the cavity form sealing space. The acquisition device comprises a sound emission sensor, a sound receiver, a stress strain gage and a stress strain meter. The defect that cracks cannot be positioned in the prior art is overcome, and traditional man-made influences based on a continuous mechanics method are avoided; by the utilization of the sound emission principle, the stress effect and the strain effect, real parameters generated in the fracture process can be obtained, especially fracture positions can be positioned, a series of characteristics of waveforms, frequency and the like generated in the fracture release process are recorded, and hydrofracture relevant parameter change and fracture rules of different coal rock samples under different confining pressure conditions are simulated.