Device and method for clay core wall hydraulic fracturing experiments

• Main Authors: GAN LEI, XU LIQUN, WANG RUI, TAO XIAOHU, ZHONG LIANG, SHEN ZHENZHONG
• Format: Patent
• Language: Chinese; English
• Published: 13.11.2013
• Subjects: INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIRCHEMICAL OR PHYSICAL PROPERTIES; MEASURING; PHYSICS; TESTING

The invention relates to a device and a method for clay core wall hydraulic fracturing experiments under simulated coupling conditions. The method is characterized in that two semi-cylindrical molds are specially made and assembled into a sample mold which is easy to assemble and disassemble; the internal temperature of a pressure chamber is controlled through changing the temperature and amount of water in a copper water pipe; internal water pressure is applied to a sample by a water flow passing through a base of the pressure chamber, a permeable plate, coarse sand and finally a blowhole; and hydraulic fracturing features of the clay sample under different conditions are studied through changing the water temperature and loading schemes of the fracturing water pressure, the axial pressure and the confining pressure, etc. The method overcomes the defects of hydraulic fracturing experiments in the prior art on core walls of earth and rock-fill dams, simulates features, force conditions, influencing factors an