【摘要】 为研究煤层频谱特征与煤层瓦斯地质参数间相关关系,选取几个典型矿区的主采煤层,采用矿井震波探测技术进行原位煤体震波波谱探测实验.试验结果表明,煤体波谱特征反映了煤层本身的物理力学性质,同一结构的煤层在其5倍厚度的距离内煤壁的主频值相对稳定,主频的变化反应了煤体结构的特征,结构破坏主频明显低移;不同的煤层具有不同的主频,突出煤层具有低主频特征.煤层瓦斯含量与煤层固有主频成较好的线性相关,煤层固有主频值越低,相应煤层瓦斯含量越高.研究结果可为煤与瓦斯突出预测提供新的方法.更多还原

【Abstract】 In order to study the relations between seismic wave spectrum and geologiacl parameters of coal seam and gas,Several typical main coal seams under mines are selected,and the spot seismic is made to wave prospect experiments under the condition of the invariable mechanic seismic sources.The result indicates that the seismic spectrum characteristics reflect the physical mechanic property of coal seams.The dominant frequency keeps relative stability within the five times distance of the depth of the coal layer in the same structure.The variance in dominant frequency of coal seams reflects structural change of them,which is mostly lower than that of non-gas-burst ones.There is a good linear relativity between the seam gas content and the dominant frequency,which gas content and its dominant frequency go conversely.The result offers a method for coal and gas outbrust forecast.更多还原