煤巷多点电流源双频激电法超前扫描探测技术

发布时间：2018-05-02 20:27

本文选题：多点电流源双频激电法 + 超前扫描探测技术　；参考：《煤田地质与勘探》2017年04期

【摘要】：在掘进工作面上设计多点电流源双频激电法探测电极布置方式,根据稳定电流场性质,建立多点电流源电场线微分方程,基于变步长四阶五级Runge-Kutta-Felhberg算法,对微分方程组进行求解。定义探测电场空间立体角和电场线边界角概念,分析探测电场平均电流密度随主屏流比系数及距掘进断面距离变化规律,确定聚焦效应探测时主屏流比系的取值范围。同时改变约束屏流比系数和主屏流比系数,分析探测电场偏转角的变化规律及对其影响的主要因素,确定偏转效应探测时约束屏流比系数的取值范围。工业性试验表明:利用该方法进行超前扫描探测,根据视幅频率和视电阻率异常激电效应参量变化规律,能够有效识别工作面前方围岩地质构造特征及低阻含水异常体的方向,但含水异常体距工作面的准确距离和含水量的大小尚需进一步研究。
[Abstract]:The multi-point current source dual-frequency IP method is designed to detect the electrode arrangement in the heading face. According to the properties of the steady current field, the differential equation of the electric field line of the multi-point current source is established. Based on the four-order five-stage Runge-Kutta-Felhberg algorithm of variable step size, the differential equations are solved. The concepts of the spatial solid angle and the boundary angle of the electric field are defined, the variation of the average current density of the detecting electric field with the ratio coefficient of the main screen current and the distance from the tunneling section is analyzed, and the range of the ratio system of the main screen current in the detection of the focusing effect is determined. At the same time, the ratio coefficient of constrained screen flow and the ratio coefficient of main screen flow are changed, and the law of the deflection angle of detecting electric field and the main factors affecting it are analyzed, and the range of the ratio coefficient of constrained screen flow is determined when the deflection effect is detected. The industrial test shows that the method can effectively identify the geological structure characteristics of surrounding rock and the direction of low resistivity abnormal body in front of the face according to the variation law of amplitude frequency and apparent resistivity abnormal induced electric effect parameter. However, the exact distance and water content between the abnormal body and the working face need to be further studied.
【作者单位】：河北工程大学机械与装备工程学院;华北科技学院机电工程学院;中国矿业大学(北京)机电与信息工程学院;
【基金】：国家高技术研究发展计划(863计划)项目(2012AA06A405) 河北省自然科学基金项目(D2017402158)~~
【分类号】：P631.3;TD166

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