| 黄启霖,尹努寻,杨武,杨德智,金少荣,宋顺昌,陈先童,吕天江,宋启文.一种改进的电法勘探技术在探测隐伏溶洞的应用[J].贵州地质,2020,37(2):199-208 |
| 一种改进的电法勘探技术在探测隐伏溶洞的应用 |
| Application of An Improved Electrical Prospecting Technique in Site Selection and Disposal of Engineering in Karst Area |
| 投稿时间：2019-11-28 |
| DOI： |
| 中文关键词: 岩溶地质 测深技术 改进的方法 电法 贵州 |
| 英文关键词:Karst geology Sounding technique Improved methods Electrical method Guizhou |
| 基金项目:贵州省地矿局地质科研项目(黔地矿科合(2018)14号)；贵州省地矿局青年地质科研项目(黔地矿科合(2018)38号)。 |
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| 中文摘要: |
| 贵州岩溶地貌分布广泛，地质情况非常复杂，严重影响重大工程建设和地下水安全，文章提出一种改进的电法勘探技术，对不良地质体勘查取得了成功应用。以直流电法理论为基础，该方法是根据视电阻率微分统计原理，由电流密度分布规律与供电电极AB两极分布总存在着一定的对应关系，在野外同一供电测线(剖面)上，通过不断加密改变供电极距AB的位置，观测测量电极MN之间的电性参数变化，求取剖面相应纵向空间上，较大深度的(近地表的)近似连续视电阻率地电断面异常。此方法在深300 m以浅的岩溶区隐患排查中取得较好勘查效果，对煤矿钻孔及页岩气钻孔的选址探测误差能够控制在7%以内，值得进一步探索实践。 |
| 英文摘要: |
| Karst landforms are widely distributed in Guizhou, and the geological conditions are very complicated, which can seriously affect the construction of major projects and the safety of groundwater, etc. This paper proposes an improved electric exploration technique, which has been successfully applied to the exploration of undesirable geological bodies. Based on the theory of direct current method, this method is according to the principle of apparent resistivity differential statistics, the current density distribution and the total power supply electrode AB the poles distribution, there is a certain relation between the same power supply line (section) in the field, through continuous encryption to change the location of the power supply polar distance AB, observation measurement between the electrical parameters of the electrode MN section to calculate the corresponding longitudinal space, large depth of approximate continuous (near) on the surface of the earth apparent resistivity abnormal electrical section. This method has achieved good exploration results in the investigation of potential hazards in the karst region with a depth of 300m and a depth of less than 300m, and the site selection detection error of coal mine boreholes and shale gas boreholes can be controlled within 7%, which is worthy of further exploration and practice. |
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