Shale bedding interface shear stiffness testing system and testing method

• Main Authors: SHI XIAOZHI, ZHU JUHUI, ZHOU WENGAO, WANG SUBING, ZHENG YUNCHUAN, CHEN MINGZHONG, GENG ZHOUMEI, YIN SHENG, YIN CONGBIN, WU XIAORONG
• Format: Patent
• Language: Chinese; English
• Published: 06.07.2021
• Subjects: INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIRCHEMICAL OR PHYSICAL PROPERTIES; MEASURING; PHYSICS; TESTING

The invention provides a shale bedding interface shear stiffness test system and a test method, the test system comprises a pressurization module, a measurement module and an interface stiffness calculation module, the pressurization module can apply a load to a rock core test piece to make the test piece undergo shear failure along a prefabricated crack; the measuring module can shoot a digital image of the surface of the test piece in the load applying process, and calculates and outputs position coordinates of specified calculation points at different moments; and the interface shear stiffness calculation module can calculate and output the interface shear stiffness according to an interface shear stiffness formula algorithm. The testing method comprises the following steps: processing or preparing a rock core test piece containing a prefabricated crack; applying a load to the test piece by using the test system, and recording the whole fracture process of the test piece; and calculating according to an in