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将4×4×8厘米的岩石标本抽真空浸水,使之水饱和,沿长轴方向加压,用JC-A型电子自动补偿电测仪测电位(平行电位V_a,横向电位V_b,对穿电位V_c),用Y5D-2型动态应变仪测标本的纵横向应变ε_1和ε_2以及压力F,用压电晶体测标本的微破裂,全部七个量由SC-16型光线示波记录仪自动记录,详见文献[1]、[2]。 文献[1]曾指出:(1)凡有引起压力降的破裂发生,同时就有电极间电位差(以下简称电位)的突变;在这样的破裂发生之前,几乎所有标本至少在一个方向上出现电位变化
The 4 × 4 × 8 cm rock specimens were immersed in water, saturated with water, and pressurized along the long axis. The measured potentials (parallel potential V_a, lateral potential V_b, Potential V_c), with Y5D-2 type dynamic strain gauge measured vertical and horizontal strain ε_1 and ε_2 and pressure F, with a piezoelectric crystal micro-fracture test, all seven by the SC-16 type optical oscilloscope automatic Record, see the literature [1], [2]. It has been pointed out in [1] that: (1) Where there is a rupture that causes a pressure drop, there is a sudden change in potential difference between the electrodes (hereinafter referred to as potential); almost all specimens appear in at least one direction before such rupture occurs Potential changes