CAJ | 학술논문

在瞬变电磁实际探测中仅以探测深度作为唯一条件，来片面衡量瞬变电磁仪器对目标水体的探测能力，具有一定的局限性。分析了判断瞬变电磁系统对目标体探测能力的必要条件，提出根据仪器参数、目标水体参数，采用三维有限差分方法计算出目标水体大地、背景大地二次感应电压；结合背景噪声，计算出有效探测时间；再通过比较有效探测时间内仪器分辨率与感应电压绝对差的大小，判断能否分辨出目标水体。采用该方法分析了EMRS-3型瞬变电磁仪对含水陷落柱、含水巷道、含水采空区、含水层模型的探测能力，验证了方法的正确性。
재순변전자실제탐측중부이탐측심도작위유일조건，래편면형량순변전자의기대목표수체적탐측능력，구유일정적국한성。분석료판단순변전자계통대목표체탐측능력적필요조건，제출근거의기삼수、목표수체삼수，채용삼유유한차분방법계산출목표수체대지、배경대지이차감응전압；결합배경조성，계산출유효탐측시간；재통과비교유효탐측시간내의기분변솔여감응전압절대차적대소，판단능부분변출목표수체。채용해방법분석료EMRS-3형순변전자의대함수함락주、함수항도、함수채공구、함수층모형적탐측능력，험증료방법적정학성。
In the actual transient electromagnetic detection, it has a certain limitation to take the detection depth as an only condition for measuring the detection ability of the transient electromagnetic instrument to the objective water body. This paper analyzed the necessary conditions for judging the detection ability of the transient electromagnetic system, and calculated out the secondary induction voltage of the earth-contained and no earth-contained objective water bodies according to parameters of the instrument and the objective water body and with the three-dimensional finite difference method; in combination with the background noise, it calculated out the effective detection time; through the comparison of the magnitude of the instrument ’ s resolution and the absolute difference of induced voltage in the effective detection time, the judgment can be made whether or not the instrument could differentiate the objective water body. Analysis was made with this method on the detection ability of EMRS-3 transient electromagnetic instrument to the models of water-filled collapse column, roadway, gob and strata, and the correctness of this method was verified.