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实验条件采用高温高压三轴(固体传压介质)实验装置。实验的最大围压7.5kb,最高温度800℃,轴向应变率为4.4×10~(-6)/sec,最大轴向应变约为10—15％;升温实验时,预热约1—1.5小时。试件直径10mm,高度20mm,矿物颗粒平均粒度约0.72mm;试件自然干燥。测试项目包括轴向应力和应变、围压以及声发射幅度的相对变化。试验后,沿试件纵剖面切片(垂直于主破裂面)作光学显微镜观测。
Experimental conditions using high temperature and pressure triaxial (solid pressure transfer media) experimental device. Experimental maximum confining pressure 7.5kb, the maximum temperature of 800 ℃, the axial strain rate of 4.4 × 10 -6 / sec, the maximum axial strain of about 10-15%; heating experiment, preheating about 1-1.5 hour. Test piece diameter 10mm, height 20mm, the average particle size of mineral particles of about 0.72mm; specimens naturally dry. Test items include axial stress and strain, confining pressure, and relative changes in acoustic emission amplitude. After the test, a longitudinal section of the specimen (perpendicular to the main rupture plane) was taken for optical microscopy.