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首页> 外文会议>International Symposium on Coal Gas Control Technology >Theoretical Study of Electromagnetic Radiation Response of Coal and Gas Outburst Prevention with Water Infusion in Coal Seam
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Theoretical Study of Electromagnetic Radiation Response of Coal and Gas Outburst Prevention with Water Infusion in Coal Seam

机译：煤层煤与煤气突出防治电磁辐射响应的理论研究

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The electromagnetic radiation (EMR) signal was experimentally tested during the deformation and fracture process of natural raw coal and coalsample with different moisture,and the effect of water on generation and propagation of EMR was studied.Results indicate that the time distributioncharacteristic of EMR signal changed during the deformation and fracture process of coal,and the EMR signal of the watered raw coal is obviously abundantthan that of the natural raw coal before the peak value of the loading stress,but the intensity of EMR signal is lower than that of natural raw coal.And the largerthe moisture is,the lower the coal electrical resistivity is,and the lower the skin depth of EMR in coal seam.Results show that the effect of water on thegeneration and propagation of EMR is obvious.Finally,the EMR was measured before,during and after the water infusion process at working face.Studiesshow that the EMR intensity is higher during water infusion,which indicate that the coal seam was wedged offby high pressure injected water and fracturedviolently;while the EMR intensity after the water infusion was lower than that before the water infusion,which shows that the high-pressure water wedgecreate plenty of crevices in coal seam along with the infusion and the coal is moistened which causes the intensity of EMR and the electrical resistivity of coalseam decrease.In addition,the decrease of coal seam electrical resistivity also leads to a significant attenuation of EMR propagation in coal seam.The uppertwo reasons make the intensity of the received EMR decrease.The effect of water infusion in coal seam for coal and gas outburst prevention can be checked bythe measuring of EMR intensity before and after the water infusion.
机译：在天然原料煤的变形和断裂过程中进行了实验测试了电磁辐射（EMR）信号，并研究了水对EMR的产生和传播的影响。结果表明EMR信号的时间分配变化在煤的变形和断裂过程中，浇水原煤的EMR信号显然是自然原煤的加载应力峰值，但EMR信号的强度低于天然原煤的强度。较大的水分是，煤电阻率越低，煤层中EMR的皮肤深度越低。结果表明，水对EMR的产生和传播显而易见的。最后，以前测量EMR ，在工作面的水输液过程中和之后。在水输注过程中，EMR强度较高，这表明煤层被楔入的高压注入水和骨折的植物;虽然水输注后的EMR强度低于水输注前的EMR强度，这表明高压水与煤层中的大量裂缝以及煤中的裂缝以及煤润湿，导致EMR的强度和煤焦芯片的电阻率降低。此外，煤层电阻率的降低也导致煤层中EMR传播的显着衰减。较高的原因使接收的EMR的强度降低。通过在水输注前后的EMR强度测量，可以检查水输液在煤层中的煤层突出预防效果。

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