短工作面陷落柱无线电波透视探测研究及应用

为了准确查明回采工作面的隐伏地质构造,采用无线电波探测基本理论和层析成像方法,结合霍尔辛赫回采工作面的构造特点,建立了典型陷落柱正演模型,并基于SIRT算法对模型进行反演,研究其综合曲线变化特征与衰减系数变化规律特征;结合霍尔辛赫实际探测资料,准确预测了工作面内的隐伏陷落柱。研究结果表明:在场强、测点编号曲线平面图中,在均匀煤层中,场强值呈上凸圆弧形中心对称分布;当电磁波穿透陷落柱时,场强值会以陷落柱为中心,呈"V"型下凹对称分布;在相对衰减系数成果图中,陷落柱形成的异常区呈条带状分布,陷落柱呈条带状分布,通过横向、纵向交叉准确定位异常;当工作面较短时,可优化观测系统,加密观测可提高无线电波透视探测的纵向分辨率。

Research and application of radio wave perspective detection of sinking column in short working face

In order to accurately identify the hidden geological structure of the mining face，the basic theory of radio wave detection and tomography method,combined with the structure characteristics of the mining face of Huoerxinhe,established a typical forward model of the collapse column and based on the SIRT algorithm.The model was inversed to study the characteristics of its comprehensive curve change and attenuation coefficient change law；combined with the actual detection data of Huoerxinhe,the concealed collapse column in the working face was accurately predicted.The results of the study showed that:in the plan view of the field strength and measuring point numbering curve,in a uniform coal layer,the field strength values were symmetrically distributed in the center of an upward convex arc；when the electromagnetic wave penetrates the sink column,the field strength value would be centered on the sink column，with a "V" shaped concave and symmetrical distribution；in the relative attenuation coefficient results graph,the abnormal area formed by the collapse column was distributed in a strip shape and the collapse column was distributed in a strip shape，and the anomaly was accurately located through horizontal and vertical intersections；when working When the surface was short,the observation system could be optimized and encrypted observation could improve the longitudinal resolution of radio wave perspective detection.