煤田地质与勘探
煤田地質與勘探
매전지질여감탐
COAL GEOLOGY & EXPLORATION
2015年
1期
86-90
,共5页
李彬%庹先国%汪楷洋%张赓
李彬%庹先國%汪楷洋%張賡
리빈%탁선국%왕해양%장갱
高密度电法%三电位电极系%断层%基岩面%地下空洞
高密度電法%三電位電極繫%斷層%基巖麵%地下空洞
고밀도전법%삼전위전겁계%단층%기암면%지하공동
high density resistivity tomography%tri-potential electrode%fault%bedrock surface%underground hollow
为了对比分析高密度电法三电位电极系α、β和γ排列针对工程中常见的基岩面、充水断层以及充填型地下空洞等类型地质体适用性的差异,首先建立相关地电模型进行正演模拟计算,并对计算电阻率进行加噪二维反演,再以工程应用实例进行验证和进一步讨论。正演与实例对比结果表明:β排列在地形等干扰条件较小时对充水断层以及充填型地下空洞分辨能力较强;α排列为基岩面探测最理想装置,而当存在一定地形等干扰条件时,α、γ排列应分别为地下空洞和近直立断层勘探的最佳装置。
為瞭對比分析高密度電法三電位電極繫α、β和γ排列針對工程中常見的基巖麵、充水斷層以及充填型地下空洞等類型地質體適用性的差異,首先建立相關地電模型進行正縯模擬計算,併對計算電阻率進行加譟二維反縯,再以工程應用實例進行驗證和進一步討論。正縯與實例對比結果錶明:β排列在地形等榦擾條件較小時對充水斷層以及充填型地下空洞分辨能力較彊;α排列為基巖麵探測最理想裝置,而噹存在一定地形等榦擾條件時,α、γ排列應分彆為地下空洞和近直立斷層勘探的最佳裝置。
위료대비분석고밀도전법삼전위전겁계α、β화γ배렬침대공정중상견적기암면、충수단층이급충전형지하공동등류형지질체괄용성적차이,수선건립상관지전모형진행정연모의계산,병대계산전조솔진행가조이유반연,재이공정응용실례진행험증화진일보토론。정연여실례대비결과표명:β배렬재지형등간우조건교소시대충수단층이급충전형지하공동분변능력교강;α배렬위기암면탐측최이상장치,이당존재일정지형등간우조건시,α、γ배렬응분별위지하공동화근직립단층감탐적최가장치。
In order to comparatively analyze the applicability of theα,βandγarrays of high density resistivity with tri-potential electrode in prospecting several kinds of common geological bodies, such as the bedrock surface, the wa-ter-bearing fault and the filled underground hollow, first, the authors built some pertinent resistivity geologic models to calculate their resistivity and then add noise to execute two dimensional resistivity inversion, then some engineering application instances have been used to verify the forward simulation results and do further analysis. The analysis re-sults of the forward simulation and application instances show that theβarray has the best resolution in detecting the water-bearing fault and the filled underground void when there is almost no topography and other interferential condi-tions, theαarray is the ideal device of exploring the bedrock surface, but when there exist some topography interfer-ence, theαandγarrays will be the best device to detect the underground void and nearly vertical fault respectively.