基于能量原理的岩石声发射伪Kaiser点修正

发布时间：2018-04-22 00:17

本文选题：岩石声发射 + Kaiser点　；参考：《煤炭学报》2017年05期

【摘要】：通过岩石声发射试验,得到试验Kaiser点,但此点可能并不是真实的Kaiser点。根据岩石声发射真实Kaiser点能量分布与非Kaiser点能量分布存在很大差别的特征,经过理论推导得到能量E与声发射振铃计数、应力状态的函数关系,证明能量E随着频带振幅、声发射振铃计数增大而增大;随着阈值电压增大而减小。以此为基础,将伪Kaiser点应力与地应力理论值对比,根据漂移应力比值计算电压阈值,压力曲线逆向寻点,重新获取Kaiser点等步骤对试验中的伪Kaiser点进行能量修正,找到真实Kaiser点,并通过能谱分析和RFPA仿真验证能量修正方法的有效性。
[Abstract]:The Kaiser point of rock acoustic emission test is obtained, but this point may not be the real Kaiser point. According to the fact that the energy distribution of the true Kaiser point of rock acoustic emission is quite different from that of the non- point energy distribution, the functional relationship between energy E and the counting of acoustic emission ring bell and stress state is obtained by theoretical derivation, and it is proved that energy E varies with the amplitude of frequency band. The number of acoustic emission ring rings increases and decreases with the increase of threshold voltage. On this basis, the pseudo- point stress is compared with the in-situ stress theoretical value, the voltage threshold is calculated according to the drift stress ratio, the pressure curve reverse seeking point is obtained, and the pseudo- point in the experiment is reacquired by energy correction, and the real Kaiser point is found. The effectiveness of the energy correction method is verified by energy spectrum analysis and RFPA simulation.
【作者单位】：重庆大学土木工程学院;重庆大学山地城镇建设与新技术教育部重点实验室;
【基金】：国家自然科学基金资助项目(51008319,51478065) 中央高校基本科研业务费项目(CDJZRPY14200001)
【分类号】：TD315

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