隧道超前地质预报中人工地震反射法的应用

Application of Seismic Reflection Method in Tunnel Geological Forecast

介绍了TSP203系统的基本工作原理,并通过该系统在新且午瓦斯隧道的应用实例,说明其在复杂地质条件下的具体应用情况。结合多年现场实际施工经验,着重分析了预报误差产生的主要原因:客观上由于岩性和构造面本身的复杂性及TSP203系统的局限性,该系统探测与隧道轴向大角度相交的近平面状的结构面较适合,小角度或者平行结构面则不适合,探测溶洞和地下水有一定难度;主观上与操作人员的运用水平密切相关。提出了提高数据采集精度以及结合实际地质情况和其他物探方法,提高对反射体解释能力的建议。

In this paper,basic working principles of TSP system are introduced,together with actual application of this system in complicated geological conditions,that is,the application of this system in Xinqiewu Gas Tunnel.Combined with several years＇ on-site experience,main reasons for forecast errors are analyzed：objectively,due to the complication of rock and structural surface themselves,and the limitation of TSP203 system,the structural surface formed by this system＇ s detection and tunnel axial direction with a big angle is suitable,and those with a small angle or parallel structure are not suitable,so it is of difficulty to detect solution cave and underground water;subjectively,operation ability of the personnel will affect the result.The proposal of increasing data collection accuracy and the explanatory ability of reflector combined with actual geological condition and other geophysical prospecting methods is made.