巨型深层岩质滑坡综合物探勘察模式探讨  

Discussion on Comprehensive Geophysical Exploration Model of Giant Deep Rock Landslides

作　　者：孙红林[1] 化希瑞[1] 赵晋乾[1] SUN Honglin;HUA Xirui;ZHAO Jinqian(China Railway Siyuan Survey and Design Group Co.Ltd,Wuhan,Hubei 430063,China)

机构地区：[1]中铁第四勘察设计院集团有限公司,武汉430063

出　　处：《铁道工程学报》2022年第8期6-11,共6页Journal of Railway Engineering Society

摘　　要：研究目的:巨型深层岩质滑坡具有成因复杂、规模大、勘察与处治难度大的特点,受地形地质条件和物探方法适用性的限制,单一物探方法往往不能完全有效揭示滑坡的范围、滑面的空间形态。本文以下个寮巨型深层凝灰岩滑坡勘察为例,从地质条件、勘探目的、探查方法等因素出发,研究适用于巨型复杂岩质滑坡综合物探的勘探模式。研究结论:(1)复杂深层岩质滑坡采用在地质调查基础上“综合物探先行”勘察程序是十分有益的,物探测线应沿主轴和垂直坡向呈网布设;(2)高频大地电磁法、高密度电法、浅层地震反射波法结合钻孔电视综合物探勘探模式具有多物性、多尺度探测优势,可有效探测滑坡空间分布形态、周界和滑带特征;(3)物探解译成果较为可靠地反映了滑面(带)的空间展布形态和规律,可作为指导钻探布置和滑坡稳定性分析的重要依据;(4)本研究结论可为巨型深层滑坡勘察提供借鉴。Research purposes:Giant deep rock landslides have the characteristics of complex genesis,large scale,and difficulties in investigation and processing.Due to the limitations of topographic and geological conditions and the applicability of geophysical methods,a single geophysical method often can′t fully and effectively reveal the scope of landslides and the spatial form of sliding surface.In this paper,the exploration of the giant deep tuff landslide in Xiageliao was taken as an example.Based on factors such as geological conditions,exploration purposes,and exploration methods,the exploration model suitable for comprehensive geophysical exploration of giant complex rock landslides was studied.Research conclusions:(1)It is very beneficial to adopt the"comprehensive geophysical prospecting first"survey procedure based on geological surveys for complex deep rock landslides.The physical detection line shall be laid out in a mesh along the main axis and the vertical slope.(2)High-frequency magnetotelluric method,high-density electrical method,shallow seismic reflection method and borehole TV comprehensive geophysical exploration have the advantages of multi-physical and multi-scale detection,and can effectively detect the spatial distribution shape,perimeter and sliding zone characteristics of landslides.(3)The results of geophysical exploration and interpretation more reliably reflect the spatial distribution pattern and law of the sliding surface,which can be used as an important basis for guiding drilling layout and landslide stability analysis.(4)The research conclusions are applicable to the investigation of giant deep landslides.

关 键 词：岩质滑坡 高频大地电磁法 高密度电法 浅层地震反射波法 

分 类 号：P631[天文地球—地质矿产勘探] P642.22[天文地球—地质学]