关键词: 声发射源, 水压致裂, 室内模拟实验, 破裂压力, 时间曲线, 最大水平主应力, 平均幅度, 辐射强度, 破裂面, 压裂压力

Abstract: This paper presents the observational results of the acoustic emission from an in-house hydrofracturing simulation experiment. It points out that propagation of the hydrofracturing crack is not continuous. Source of microfracturing and the distribution of macroc-cracks coincide generally, they all occur in the orientation of maximum horizontal principal stress. Amplitude of acoustic emission is bigger along a direction normal to the linear fracturing source. The amplitude of S wave is bigger in the observed signals. Obvious acoustic emission usually occurs at a fracturing of an integral rock, However, the amplitude of acoustic emission has not on obvious relation to fracturing pressure. These experimental results may be used as a reference to the actual field observations.