An experimental device for testing rock fracture toughness under pore pressure conditions
A technology of pore pressure and fracture toughness, which is applied to measuring devices, using stable tension/pressure to test the strength and strength characteristics of materials, etc. It can solve the problem that the pore pressure is not considered, the real situation of the formation cannot be reflected, and the fracture toughness test results cannot be obtained. Accurate results and other issues, to achieve the effect of simple structure, accurate fracture toughness and strong practicability
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[0038] In order to have a clearer understanding of the technical features, purposes and effects of the present invention, the specific implementation of a preferred embodiment of the present invention will now be described with reference to the accompanying drawings.
[0039] Figure 1-Figure 6 Shown is an experimental device for testing rock fracture toughness under pore pressure conditions, which includes a testing machine, a confining pressure chamber and a clamping fixture. The testing machine includes testing machine rigid frame 1, rigid frame pressure head 2, trolley 7, slide rail 8, hydraulic shaft 9, hydraulic cylinder 10, rigid frame pressure head 2 is installed on the upper end of testing machine rigid frame 1, and rigid frame pressure head 2 is installed on the lower end of testing machine rigid frame 1. Hydraulic cylinder 10, there is a hydraulic shaft 9 inside the hydraulic cylinder 10, the trolley 7 is located on the platform of the rigid frame 1 of the testing m...
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