True-triaxial integrated experimental system for fracturing due to flowing pressure, slotting, seepage and gas driving

The invention relates to the field of coal mining and in particular to a true-triaxial integrated experimental system for fracturing due to flowing pressure, slotting, seepage and gas driving. The true-triaxial integrated experimental system comprises a true-triaxial experimental framework, a loading system and a monitoring system. Under a true-triaxial stress condition, an experiment with a maximal test block dimension of 500*500*500 mm can be realized. Fracturing due to flowing pressure can be simultaneously and independently controlled by at most five drill holes, and the water pressure for fracturing due to drilling can reach 60 MPa. Influence of gas in a coal body can be considered. A high-seepage-pressure seepage and fluid-solid coupling test with a maximal test block dimension of 400*400*400 mm can be realized. A true-triaxial mechanical deformation test of coal and soft rocks can be performed. The true-triaxial integrated experimental system is provided with a high-pressure pump experimental table for coal mine with the flow rate of 70 L/min and the water pressure of 70 MPa, so that tests of drilling, slotting, high-pressure water and the like can be performed. With adoption of the system, a hydraulic fracturing process of a coal and rock layer can be systematically and accurately researched and judged, so that the construction effect and the safety are improved.