成庄矿煤岩破坏电磁辐射特性及其应用研究

利用电磁辐射信号采集试验系统,研究了晋煤集团成庄矿煤岩在单轴压缩、拉伸、剪切破坏条件下的电磁辐射和声发射特性。试验结果表明,煤岩变形破坏过程中有电磁辐射信号产生,受载煤岩产生的电磁辐射与变形破裂过程紧密相关,基本成正比关系;经过与同步测试的声发射信号相比,发现电磁辐射信号更丰富。现场利用煤岩破坏的电磁辐射监测技术可以定量研究工作面推进基本顶来压、顶板周期来压的动态变化规律。

Research on electric magnetic radiation features of coal and rock failure in Chengzhuang Mine and application

With the electric magnetic radiation signal collection test system,the paper studied the electric magnetic radiation and sound transmission features of coal and rock under the axial compression,tension and shearing failure conditions.The test results showed that there are electric magnetic radiation signals occurred during the coal and rock deformation period.The electric magnetic radiation from the loaded coal and rock had a closed relationship with the deformation failure process.There is a direct ratio relationship between the two.In comparison with the sound transmission signals,the signals of the electric magnetic radiation are more rich.The application of the electric magnetic radiation monitoring and measurement technology at the mine site can punitively study dynamic varied law of the pressure on basic roof and the periodical pressures of the mining face.