三峡库区巫峡段高陡峡谷区危岩裂隙带探地雷达探测

doi:10.11720/wtyht.2020.1259

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摘要

三峡库岸岩石受构造、风化及消落带水位影响裂隙发育,本文利用有限差分正演算法程序模拟计算危岩裂隙的探地雷达响应特征,结果表明:不同形态下的裂缝有不同的探地雷达响应特征,通过模型与模拟计算结果建立的对应关系可从野外实测数据中识别岩体裂缝。以重庆巫峡板壁岩危岩带探地雷达探测为例,对探地雷达野外实测数据进行推断解释危岩裂隙带,并以钻孔高清摄像及波速测试验证推断解释的准确性,为防治、监测方案的制定提供科学依据。该案例可为其他库岸高陡峡谷区危岩裂隙带探测提供借鉴。

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	高阳
	彭明涛
	杨培胜
	王恒
	王平
	李海

关键词 ：三峡库区, 高陡峡谷区, 消落带, 裂隙探测, 探地雷达

Abstract：

Rocks along the Three Gorges reservoir area are cracked due to the influence of structure,weathering and water-level-fluctuation area.In this paper,the finite difference forward algorithm program was used to simulate and calculate the radar response characteristics of the fractures of dangerous rock body.The results show that different inclined fractures have different GPR response characteristics.According to the corresponding relationship between model and simulation results,fractures can be identified from field measured data.Taking the geological radar detection of Banbiyan dangerous rock zone in Chongqing as a study case,the authors successfully identified the fractures of dangerous rock bodies by inferring and interpreting the field measured data of ground penetrating radar.The case study itself can be used as a reference for the detection of the fractures of the dangerous rock body in other water-level-fluctuation areas.

Key words： Three Gorges reservoir bank high-steep gorge area water-level-fluctuation area fractures of dangerous rock body geological radar detection

收稿日期: 2019-05-10 出版日期: 2020-04-22

P631.4

基金资助:重庆市国土资源和房屋管理局项目(渝国土房管(2017)522号文批准)

作者简介: 高阳(1987-),男,物探工程师,硕士研究生,从事工程、水文、地灾地球物理勘探及工程检测工作。Email: gaoyang2580@126.com

引用本文:

高阳, 彭明涛, 杨培胜, 王恒, 王平, 李海. 三峡库区巫峡段高陡峡谷区危岩裂隙带探地雷达探测[J]. 物探与化探, 2020, 44(2): 441-448.
Yang GAO, Ming-Tao PENG, Pei-Sheng YANG, Heng WANG, Ping WANG, Hai LI. Geological radar detection for the fractures of dangerous rock body in the high-steep gorge area of Wuxia section in the Three Gorges reservoir area. Geophysical and Geochemical Exploration, 2020, 44(2): 441-448.

链接本文:

https://www.wutanyuhuatan.com/CN/10.11720/wtyht.2020.1259 或 https://www.wutanyuhuatan.com/CN/Y2020/V44/I2/441

Fig.1 裂缝模型探地雷达正演模拟效果
a—垂直裂缝模型及模拟结果;b—倾斜裂缝模型及模拟结果;c—垂直倾斜组合裂缝模型及模拟结果;d—组合裂缝模型及模拟结果;e—分离的空洞模型及模拟结果;f—合并的空洞模型及模拟结果

Fig.2 板壁岩危岩带危岩分布立面图

Fig.3 探地雷达测线平面示意

Fig.4 146 m高程线探地雷达图像

Fig.5 156 m高程线探地雷达图像

Fig.6 176 m高程线探地雷达图像

Fig.7 XK1钻孔孔内高清摄像图像

Fig.8 XK4钻孔孔内高清摄像图像

Fig.9 XK2钻孔波速测试成果

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