| 基于弹性波CT技术的岩体破裂探测方法 |
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| 引用本文： | 李高,郑旭辉,张宝君,宋亚新,相爱芹,初娜.基于弹性波CT技术的岩体破裂探测方法[J].CT理论与应用研究,2015,24(5):681-688. |
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| 作者姓名： | 李高 郑旭辉 张宝君 宋亚新 相爱芹 初娜 |
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| 作者单位： | 1. 有色金属矿产地质调查中心, 北京 100012; |
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| 摘 要： | 弹性波层析成像技术简称“弹性波CT扫描”,是在不损坏物体的前提下,利用弹性波射线穿透地层时,其走时及振幅与地层内部的某些物理参数存在线性积分关系的这一关键特征,反演地层内部三维速度结构或衰减特性的方法。本文基于弹性波CT技术,通过孔间岩体慢度反演,综合钻孔编录及工程现场情况,对承德市半壁山危岩体中破裂发育情况进行综合解译,测定岩体破裂发育的位置和规模。实践证明,采用弹性波CT方法探测得到的破裂位置与钻孔揭露的情况吻合,为危岩体的整治提供了依据。
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| 关 键 词： | 弹性波CT 岩体破裂探测 慢度反演 解译 |
| 收稿时间： | 2015-07-21 |
A Detecting Method for Rock Mass Fracture Based on Elastic Wave CT Technique |
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| Institution: | 1. China Non-ferrous Metals Resource Geological Survey, Beijing 100012, China;2. China University of Geosciences, School of Engineering and Technology, Beiing 100083, China;3. No.4 Geological Brigade Hebei Bureau of Geology and Mineral Exploration, Chengde 067000, China |
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| Abstract: | Elastic wave tomography technique, short for "elastic wave CT scanning". As is known, there is a linear integral relationship between the travel time and amplitude of the elastic wave ray propagating through stratum and some physical parameters of the stratum. By using this key characteristics, elastic wave CT scanning can retrieve 3d velocity structure and attenuation characteristics of strata on the premise of no damage to the object. In this paper, based on the elastic wave CT technique, through the inversion of the rock mass slowness between holes and synthesizing the drill core record and engineering site situation, fractures development of Banbi Mountain in Chengde City was interpreted, the location and size of the risk rock mass fractures were determined. It is proved that fractures position detected by the elastic wave CT technique is consistent with the situation in the field after drilling, which provides basis for the comprehensive improvement of the risk rock mass. |
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| Keywords: | elastic wave CT rock mass fracture detecting slowness inversion interpret |
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