论文部分内容阅读
选用球型压头和十字型压头在RMT-150C岩石力学试验机上对花岗岩分别进行不同加载速率的岩石破碎实验,采用KBD5电磁辐射数据采集系统对岩石破碎过程中产生的电磁辐射信号进行采集处理,应用分形理论分析电磁辐射脉冲数的分形特征.实验结果表明:试件在受载过程中电磁辐射脉冲数与时间具有明显的分形特征,并随加载速率增大电磁辐射信号强度增大,分形维数D也增大,具有很好的相关性;在相同速率的岩石加载破碎条件下,十字型压头电磁辐射分形维数D比球型压头的大,与电磁辐射脉冲信号的强度变化呈相同的规律,利用电磁辐射脉冲信号和分形维数D的相同规律可以更全面地反映岩石的真实破裂过程.
The ball crusher and cruciform pressure head were used to test the granite rock crushing experiment under different loading rates on the RMT-150C rock mechanics testing machine. The KBD5 electromagnetic radiation data acquisition system was used to collect and process the electromagnetic radiation signals generated during the rock crushing process , Fractal theory is used to analyze the fractal characteristics of electromagnetic radiation pulse number.The experimental results show that the electromagnetic pulse pulse number and time has obvious fractal characteristics during loading and the signal intensity of electromagnetic radiation increases with the increase of loading rate.The fractal The dimension D also increases and has a good correlation. Under the same rock loading and crushing conditions, the fractal dimension D of the crosshead electromagnetic radiation is larger than that of the spherical head, and the intensity of the pulse signal of the electromagnetic radiation The same law, the same rule of the pulse signal of electromagnetic radiation and the fractal dimension D can more completely reflect the true rupture process of rock.