被动震源进行地震勘探的可行性研究

为研究冲击钻机、打桩机、打夯机以及筑路机等设备工作时产生的震源，对开展工程地震勘探时的利用价值，在东庞矿2093工作面治水钻孔冲击钻进过程中进行了该项实验工作。试验采用WF-1006遥测数字地震仪及CGS-40型加速度检波器，接收排列之间方位角间隔20。，接收道数24道，道距5m，采样率1ms，记录长度2s。最近检波器距钻孔7m。利用SCHRAMM钻机产生的强大振动为被动震源，进行了250m、257m、183m、263m等不同钻井深度，以及与此相对应不同方位角（250°、250°、230°275°）的地震波接收试验。通过分析其地震记录，判定引发东庞矿矿井突水的陷落柱中心位于治水钻孔西南方向。该结论与三维地震勘探确定的陷落柱位置一致，可见通过选择合理的接收方式及参数，被动震源也能够用于地震勘探。

Feasibility Study of Seismic Prospecting Carried out through Passive Sources

To study the value in seismic prospecting use of sources induced by percussion machine, pile driver, ram engine and road builder, for this reason carried out experiment in a water controlling percussion drilling in No.2093 working face, Dongpang coalmine. The WF-1006 telemetering digital seismograph and CGS-40 acceleration detector were used in the experiment, receiving spread position angle interval 20°, receiving channel 24, group interval 5m, sampling rate lms, recording length 2s, nearest distance from geophone to drilling hole 7m. Strong vibration from SCHRAMM rig was the passive source, carried out 250m, 257m, 183m and 263m different depth drillings, and relevant position angle （250°, 250°, 230° and 275°） seismic wave receiving tests. Through seismic recording analysis, determined the subsided column center that initiated Dongpang coalmine water bursting is situated at southwest to the water controlling borehole. The conclusion is the same as the 3D seismic prospecting determined subsided column location, it is thus clear that passive sources also can be used in seismic prospecting if reasonable receiving patterns and parameters have selected.