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通过对米溪梁隧道超前地质预报过程及原理的描述,结合预报围岩情况及实际围岩对比,揭示了TSP法的准确程度。TSP方法属于多波多分量高分辨率地震反射法。地震波在设计的震源点用小量炸药激发产生。当地震波遇到岩石波阻抗差异界面,一部分地震信号反射回来,一部分信号透射进入前方介质,反射的地震信号将被高灵敏度的地震检波器接收,通过处理,了解隧道工作面前方的地质体性质。
Through the description of advance geological forecast process and principle of Mici-liang tunnel, the accuracy of TSP method is revealed by combining the prediction of surrounding rock and the actual surrounding rock. The TSP method belongs to the multi-wave and multi-component high-resolution seismic reflection method. Seismic waves in the design of the source point with a small amount of explosives generated. When the seismic wave encounters the rock impedance difference interface, some of the seismic signals are reflected back and some of the signals are transmitted into the front medium. The reflected seismic signals are received by the high-sensitivity seismic geophones and processed to understand the geological body in front of the tunnel working face.