孔内多点源直流电阻率三维正演研究
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P319

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中国国家铁路集团重大课题(K2018G015)、中国铁路设计集团科技开发计划(721811)


Direct Resistivity 3D Forward Modeling of Multi-point Source in Borehole
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Major project of China Railway Group (k2018g015), science and technology development plan of China Railway Design Group (721811)

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    摘要:

    为验证孔内多点源地面三维观测方法的有效性,通过孔内多点源地表电位场理论公式推导、有限差分数值计算研究了多种地电模型的地表响应。结果表明:钻孔内多点源直流电阻率三维观测思路可行,能够很好的识别地下异常体的平面位置及电阻率高低。可见在工程勘察中,可以在钻孔内布置多个点电源地表三维观测,判定钻孔附近地下岩土层结构及含水区分布情况,为钻孔周围的勘察空白区提供补充,丰富工程勘察资料。

    Abstract:

    In order to verify the effectiveness of the three-dimensional ground observation method with multi-point sources in the borehole, the surface response of various geoelectric models was studied by theoretical formula derivation and finite difference numerical calculation. The results show that the three-dimensional observation idea of multi-point source DC resistivity in borehole is feasible, and it can identify the plane position and resistivity of underground abnormal body well. It can be seen that in the engineering investigation, three-dimensional observation of the ground surface with multiple power sources can be arranged in the borehole to determine the distribution of underground rock and soil layer structure and water bearing area near the borehole, so as to provide supplement for the blank area around the borehole and enrich the engineering investigation data.

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赵广茂,张福彬. 孔内多点源直流电阻率三维正演研究[J]. 科学技术与工程, 2021, 21(2): 447-452.
Zhao Guangmao, Zhang Fubin. Direct Resistivity 3D Forward Modeling of Multi-point Source in Borehole[J]. Science Technology and Engineering,2021,21(2):447-452.

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  • 收稿日期:2020-04-10
  • 最后修改日期:2020-10-27
  • 录用日期:2020-06-22
  • 在线发布日期: 2021-02-07
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