模拟矿井下的电磁辐射干扰信号的特征规律研究

Study on Characteristic Law of Electromagnetic Radiation Interference Signals in Simulated Mine

建立了电磁辐射干扰模拟实验系统,用风机的转动作为煤岩破裂模拟的背景值。通过改变振动台的振幅和频率来改变电磁干扰的强度和频率,模拟测试了煤矿井下电磁干扰信号特征规律。实验结果表明:在振幅保持不变时,随着频率增大,电磁辐射强度呈现先增加后保持不变的变化规律;在频率保持不变时,随着振幅增大,电磁辐射强度则呈现先增加后减小然后保持不变的变化规律;随着探头位置变大,电磁辐射能量呈现逐渐降低的变化规律。

The simulation experiment system of electromagnetic radiation interference was established, and the rotation of the fan was used as the background value of coal rock rupture simulation. By changing the amplitude and frequency of the vibration table to change the intensity and frequency of electromagnetic interference, the characteristics of electromagnetic interference signal in coal mine were simulated and tested. The experimental results show that the electromagnetic radiation intensity increases with the increase of the frequency when the amplitude is constant. When the frequency remains constant, the intensity of the electromagnetic radiation increases with the increase of the amplitude increase and then decrease and then keep the same change law. With the change of the position of the probe, the electromagnetic radiation energy is gradually decreasing.