中国岩溶
中國巖溶
중국암용
CARSOLOGICA SINICA
2015年
3期
292-297
,共6页
高密度电阻率法微测系统%电极距%岩溶管道深度%物理模拟试验
高密度電阻率法微測繫統%電極距%巖溶管道深度%物理模擬試驗
고밀도전조솔법미측계통%전겁거%암용관도심도%물리모의시험
high density electrical method micro-electrical measurement system%electrode spacing%depth of karst conduit%physical simulation experiment
高密度电法在岩溶区找水具有很好的效果，岩溶山区岩溶管道深度各异，为了探寻岩溶管道深度变化下高密度电阻率的响应规律，本文以高密度电阻率法原理为基础，采用高密度电阻率法微测系统，利用铜柱体模型，模拟均匀介质下不同深度岩溶管道的高密度电阻率响应特征。结果表明：当岩溶管道深度大于15倍电极距时，矩形 AMN 装置和滚动 MNB 装置未能探测到该深度的岩溶管道；当岩溶管道深度小于10~11倍电极距时，矩形 AMN 和滚动 MNB 装置联合能较精准地定位岩溶管道在平面上的投影位置；岩溶管道反演异常的横向宽度始终大于真实异常横向宽度，反演异常顶部埋深小于或等于真实异常顶部埋深，且岩溶管道深度越浅，反演异常体的形态、大小、埋深越接近真实异常；随岩溶管道深度的增加，岩溶管道的矩形 AMN 装置和滚动 MNB 装置异常反演形态由椭圆向半椭圆、弓形变化，直至消失。
高密度電法在巖溶區找水具有很好的效果，巖溶山區巖溶管道深度各異，為瞭探尋巖溶管道深度變化下高密度電阻率的響應規律，本文以高密度電阻率法原理為基礎，採用高密度電阻率法微測繫統，利用銅柱體模型，模擬均勻介質下不同深度巖溶管道的高密度電阻率響應特徵。結果錶明：噹巖溶管道深度大于15倍電極距時，矩形 AMN 裝置和滾動 MNB 裝置未能探測到該深度的巖溶管道；噹巖溶管道深度小于10~11倍電極距時，矩形 AMN 和滾動 MNB 裝置聯閤能較精準地定位巖溶管道在平麵上的投影位置；巖溶管道反縯異常的橫嚮寬度始終大于真實異常橫嚮寬度，反縯異常頂部埋深小于或等于真實異常頂部埋深，且巖溶管道深度越淺，反縯異常體的形態、大小、埋深越接近真實異常；隨巖溶管道深度的增加，巖溶管道的矩形 AMN 裝置和滾動 MNB 裝置異常反縯形態由橢圓嚮半橢圓、弓形變化，直至消失。
고밀도전법재암용구조수구유흔호적효과，암용산구암용관도심도각이，위료탐심암용관도심도변화하고밀도전조솔적향응규률，본문이고밀도전조솔법원리위기출，채용고밀도전조솔법미측계통，이용동주체모형，모의균균개질하불동심도암용관도적고밀도전조솔향응특정。결과표명：당암용관도심도대우15배전겁거시，구형 AMN 장치화곤동 MNB 장치미능탐측도해심도적암용관도；당암용관도심도소우10~11배전겁거시，구형 AMN 화곤동 MNB 장치연합능교정준지정위암용관도재평면상적투영위치；암용관도반연이상적횡향관도시종대우진실이상횡향관도，반연이상정부매심소우혹등우진실이상정부매심，차암용관도심도월천，반연이상체적형태、대소、매심월접근진실이상；수암용관도심도적증가，암용관도적구형 AMN 장치화곤동 MNB 장치이상반연형태유타원향반타원、궁형변화，직지소실。
The high-density resistivity method is effective in searching for water in karst areas.As karst con-duits in mountainous areas are at different depths,it is necessary to study the characteristics and rules of this method in such an environment.This work is based on the principle of the high-density electrical method. Using a high-density micro-electrical measurement system and the copper cylinder model,it simulates the re-sponse characteristics of the high-density resistivity method for different depths of karst conduits in a homo-geneous medium.The results indicate that when the depth of karst conduits exceeds 15 times of the electrode spacing,the AMN and the MNB device cannot detect these conduits.When the depth of karst conduits is less than 10 to1 1 times of the electrode spacing,the combination of the AMN device and MNB device can precisely locate the horizontal position of the karst conduits.The transverse width of karst conduit inversion anomalies are always greater than the transverse width of the true anomalies.The buried depth of inversion anomalies are less than or equal to the true ones.And the shallower of the karst conduits,the closer of the inversion of anomaly body shape,size,and depth to the true anomalies.With the increasing of the depth of karst conduits,the forms of AMN device and MNB device inversion anomalies change from ellipse to semi-el-lipse,then to bow till they disappear.
