摘要
为了研究岩石加压过程的三维破裂图象和它的动力学性质,特研制了岩石破裂实验数据采集分析系统.它用了8通道实时记录加压岩样从出现微破裂直至最后主破裂过程中所激发的完整波形,这些数据以数字形式存储在 IBM 个人计算机(或286,386型个人计算机)的硬盘中,也可以用软盘保存.每一道采样率高达10MHz.该系统对加压岩样中每一声发射事件用8个通道采集数据,并通过对均匀各向异性岩样中声发射事件走时的数学建模,将位置的三个分量和速度的三个分量作为未知量,建立方程组作联合反演,以对声发射事件作三维定位和动态速度求解,从而为全面地研究岩石破裂动态过程打下基础.
We have made the data collection and analysis system for recording microcracks in rock to study the three dimensional pattern of fracture and the dynamic properties of rock during pressurization. This system,with 8 channel data detection, records in real-time, from the initial microcracks to the final vibration waveform excited by the master fracture. The detected data are recorded by digital theharddiskofan IBM personal computerfor 286,386 personal computer ) as well as transmitted to the disk. The sampling rate for each channel is 10 MHz.Collecting every acoustic emission events in the loaded rock sample with 8 channels by this system, mathematically modelling the AE event travel time, and taking the coordinates of the AE event hypocenter and the three components of P wave velocity as unknown parameters, we set up a set of residual equations for joint inversion, so that the three dimensional localization of AE event hypocenters can be completed under variable velocities, which will lay foundations for the research on rock fracture clearly.
出处
《地震学报》
CSCD
北大核心
1991年第4期489-495,共7页
Acta Seismologica Sinica
基金
地震科学联合基金会资助
