地音监测技术在冲击地压矿井中的应用

Application of Earth Sound Monitoring Technology in Rock Burst Mines

为研究地音监测数据和冲击地压危险的内在关联,分析了矿压显现期间地音监测数据的变化规律。结果表明:稳定状态下煤岩体地音事件的频次值和能量值具有较好的一致性;当频次值和能量值变化趋势不一致时,表明煤岩体开始集聚弹性变形能,地音事件异常持续时间越长,发生冲击失稳的可能性越大;当相邻多个传感器的数据出现同步变化时,表明煤岩体集聚能量的范围和程度增大,可能发生大范围冲击显现。

In order to study the internal relationship between the earth sound monitoring data and the risk of rock burst,the change law of the earth sound monitoring data during the occurrence of rock burst is analyzed.The results show that the frequency value and energy value of the earth sound events of coal and rock mass in stable state have good consistency;When the change trend of frequency value and energy value is not consistent,it indicates that the elastic deformation energy of coal and rock mass begins to accumulate.The longer the abnormal duration of earth sound event is,the greater the possibility of impact instability;When the data of multiple adjacent sensors change synchronously,it indicates that the range and degree of energy accumulation in coal and rock mass increase,and a large range of impact may occur.