论文部分内容阅读
岩溶、裂隙及岩石破碎发育带是碳酸盐岩地区隧道施工安全隐患,本文将高分辨率电磁波CT技术成功应用到某隧道已钻孔之间的不良地质现象的勘察,在发射孔中的不同位置上发射高频电磁波,同时在接收孔中测量各发射点发射的电磁波穿透孔间介质后的电磁波射线强度,应用迭代收敛性较好、收敛速度较快的SIRT算法,进行电磁波视吸收系数成像,并结合工程钻探取芯结果,较为准确地推断出了4个孔之间的岩溶、裂隙及岩石破碎发育带分布。
Karst fractures and rock crushing development zone are potential safety problems in the construction of tunnels in carbonate rock area. In this paper, the high resolution electromagnetic wave CT technique is successfully applied to the survey of adverse geological phenomena that have been drilled in a tunnel. Frequency electromagnetic wave is emitted at the same time, and the electromagnetic wave intensity of the electromagnetic wave transmitted through each transmitting point is measured in the receiving hole. The SIRT algorithm with better iterative convergence and faster convergence rate is adopted to measure the electromagnetic absorption coefficient Based on the results of engineering drilling and coring, the distribution of karst, fractures and rock crustal development zones between 4 holes is deduced more accurately.