矿业安全与环保
礦業安全與環保
광업안전여배보
MINING SAFETY & ENVIRONMENTAL PROTECTION
2015年
1期
76-79
,共4页
三维高密度电法%有限差分%圆滑约束最小二乘法%积水采空区
三維高密度電法%有限差分%圓滑約束最小二乘法%積水採空區
삼유고밀도전법%유한차분%원활약속최소이승법%적수채공구
3D high-density electrical method%finite-difference method%smooth constrained least square method%water-accumulated gob
对点源三维地电场的有限差分计算方法进行了讨论，推导出三极装置在多层水平地层的视电阻率计算表达式。以3层水平地层为例，根据地层厚度和视电阻率的变化得到不同类型曲线。分析了以圆滑约束最小二乘法为核心的反演程序，并通过实例验证了三维高密度电法正、反演计算方法的正确性、准确性，三维立体成图的直观性。该方法提高了对矿井老空区分布范围及富水性的探测能力，为控制矿井突水事故提供了科学的技术手段。
對點源三維地電場的有限差分計算方法進行瞭討論，推導齣三極裝置在多層水平地層的視電阻率計算錶達式。以3層水平地層為例，根據地層厚度和視電阻率的變化得到不同類型麯線。分析瞭以圓滑約束最小二乘法為覈心的反縯程序，併通過實例驗證瞭三維高密度電法正、反縯計算方法的正確性、準確性，三維立體成圖的直觀性。該方法提高瞭對礦井老空區分佈範圍及富水性的探測能力，為控製礦井突水事故提供瞭科學的技術手段。
대점원삼유지전장적유한차분계산방법진행료토론，추도출삼겁장치재다층수평지층적시전조솔계산표체식。이3층수평지층위례，근거지층후도화시전조솔적변화득도불동류형곡선。분석료이원활약속최소이승법위핵심적반연정서，병통과실례험증료삼유고밀도전법정、반연계산방법적정학성、준학성，삼유입체성도적직관성。해방법제고료대광정로공구분포범위급부수성적탐측능력，위공제광정돌수사고제공료과학적기술수단。
In this paper,the finite-difference computation of the three-dimensional geo-electric field of the point source was discussed,and the apparent resistivity calculation expression of the tripolar device in multiple horizontal strata was derived. By taking three horizontal strata as the example,different types of curves were obtained according to the change of the thickness and the apparent resistivity of the strata. The inversion program which takes the smooth constrained least square method as the core was analyzed,the correctness and accuracy of the forward and inversion calculation of 3D high-density electrical method and the visualization of the 3D mapping were verified by examples. This method improved the detection ability of the distribution scope and water enrichment of the old gobs and provided technical means for the control of mine water inrush.
