Hydraulic fracture tester and method for simulating permeable liquid of suddenly-heightened water head

Abstract

The invention discloses a hydraulic fracture tester and a method for simulating a permeable liquid of a suddenly-heightened water head. The device is provided with a pressure chamber consists of a top cover, a cylinder and a base, wherein a cylindrical test piece is fixedly arranged on the base; a test piece axial force applying device is arranged on the top cover in a penetrating manner; two ends of a test piece are respectively connected with a water outlet pipe and a first water inlet pipe for providing fracture water pressure; the pressure chamber is connected with a second water inlet pipe for providing confining pressure; an impermeable membrane is spaced between the first water inlet pipe and the hole wall of a drilling test piece; resistance wires are attached to the impermeable membrane; an acoustic emission sensor is arranged on the cylinder. The method comprises the following steps: producing the test piece; setting up the tester; loading the test piece; analyzing a failure process, and the like. The invention fills up the blank of a hydraulic fracture failure testing device and the method for the permeable liquid of the sudden heightened water head, and provides test conditions for deeply researching a hydraulic fracture mechanism.

Description

technical field [0001] The invention relates to a hydraulic splitting tester for simulating sudden addition of a high water head permeability liquid and a test method thereof, belonging to the field of hydraulic test devices. Background technique [0002] Hydraulic fracturing of rock mass is an aspect of rock mass seepage-stress coupling research, which refers to the physical phenomenon of micro-crack initiation, expansion, and penetration of rock mass under the action of water pressure, until the final macro-cracks lead to instability and destruction. It reflects the effect of seepage water pressure on rock mass structure. On December 2, 1959, the Malpasset arch dam in France collapsed when it first impounded water. This is a typical engineering accident example caused by hydraulic splitting. People began to realize the importance of studying hydraulic fracturing from two aspects of basic theory and engineering application. Hydraulic fracturing is the theoretical basis fo...

AI Technical Summary

Problems solved by technology

[0005] Purpose of the invention: In view of the defect that the existing hydraulic splitting test device cannot simulate the hydraulic splitting damage of the sudden increase of the high water head seepage liquid, the present invention provides a hydraulic splitting tester for simulating the sudden increase of the high water head permeability liquid and its The test method provides experimental conditions for further research on the mechanism of hydraulic fracturing

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