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| WAVEFORM CHARACTERISTICS OF GPR GROUND FISSURE EXPLORATION |
| LI Yuan-qiang |
| Beijing Institute of Geology, Beijing 100120, China |
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Abstract As ground fissures are characterized by varied geneses, small width and special distribution, the utilization of Ground Penetrating Radar (GPR) for ground fissure exploration can hardly attain ideal exploration result. Exemplified by relatively good waveform images obtained in GPR exploration of ground fissures of three different geneses (underground mining-out, active faults and groundwater over-exploitation), this paper describes the working procedure from antenna arrangement, survey line deployment to data processing and image interpretation, and sums up GPR waveform characteristics of ground fissures of different genetic types. Drilling and trench verification shows that the exploration results of GPR are accurate. The GPR exploration can accurately reflect the development situation of ground fissures in depth and detect new ground fissures, thus providing scientific basis for analyzing the genesis and mechanism of the ground fissure.
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Received: 28 February 2011
Published: 10 August 2012
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