煤矿井下巷道槽波的频散特性研究

Study on the dispersion characteristics of groove in underground roadway of coal mine

为了分析实际接收的槽波信息,真实反演地质条件,采用Matlab数学模拟软件,对影响煤矿井下槽波频散特性影响因素,底板岩层横波速度、煤层横波速度、煤的密度、顶底板岩层密度、煤层厚度等对频散曲线的影响程度进行了研究。研究得出:煤层的横波速度对煤矿井下槽波频散特性的影响最大,埃里相位的速度与煤层的横波速度密切相关,煤层的横波速度越高,埃里相位的速度也越高;围岩和煤层密度对勒夫型槽波的频散特性影响最低,因此在实际探测时,可以忽略围岩和煤层密度对频散特性的影响,为煤矿安全掘进回采提供科学依据,确保矿井的安全生产。

In order to analyze the actual received trough wave information,the real ground conditions were simulated and Matlab simulation software was used to analyze the influencing factors of the trough wave dispersion characteristics,the shear wave velocity,the coal seam shear rate,the density of coal,and the influence of the thickness of coal seam on the dispersion curve is studied.It was concluded that the shear wave velocity of the coal seam has the greatest influence on the wave-wave dispersion characteristics of the coal mine.The velocity of the phase was closely related to the shear wave velocity of the coal seam.The higher the shear wave velocity,the higher the velocity of the Erie phase;the surrounding rock and the coal seam density have the least effect on the dispersion characteristics of the Loew-type groove wave.Therefore,in the actual detection,the surrounding rock and coal density can be neglected.The impact of coal mine safety excavation to provide a scientific basis to ensure that the mine production safety.