无线电波反射法探测回采工作面断层技术应用

Reflection Method in Detecting Fault Technology of Stoping Face

为更快捷探明井下构造情况,采用无线电波反射法对工作面断层进行探测。对无线电波传播、反射原理进行分析,通过数值模拟掌握无线电波在空巷传播以及反射能量突变规律:整体上电磁波在无障碍空巷内传播时其H_(x)分量的场强值与距离大致呈线性关系;与无断层工作面相比,存在断层的工作面接收点会在相应位置发生突变,突变幅度随着断层距离增大而减小。在数值模拟基础上,开展12407工作面无线电波反射法勘探,结果证明:无线电波反射法可以对断层构造进行辅助探查,较大落差的断层更有助于反射电磁波的形成。

In order to explore the underground structure more quickly,the radio wave reflection method is used to detect the fault of the working face.The principle of radio wave propagation and reflection is analyzed,and the law of radio wave propagation and reflection energy mutation in open roadway is mastered by numerical simulation.As a whole,the field intensity of H_(x) component is roughly linear with distance when electromagnetic wave propagates in open roadway.Compared with the working face without fault,the receiving point of the working face with fault will have a sudden change in the corresponding position,and the amplitude of the sudden change will decrease with the increase of the fault distance.On the basis of numerical simulation,the radio wave reflection method of 12407 working face is carried out.The results show that the radio wave reflection method can assist the exploration of fault structure,and the fault with large drop is more conducive to the formation of reflected electromagnetic wave.