摘要:
在新疆戈壁地区年降雨量少,水分蒸发量大,地表长期处于干燥状态,易形成干燥薄层干质第四系堆积. 物探大功率激电勘探需要较高电流,在干燥的地表处埋设电极接地电阻往往较大,给供电造成较大困难. 为有效解决此类问题,实现大功率激电勘探的可行性,同时兼顾提高生产效率,在参考借鉴前人研究成果以及生产经验的基础上,总结并付诸应用了改善干燥薄层松散地表地区接地电阻的方法技术,即采用湿土掩埋多孔片状电极. 该方法的应用,不仅解决了该类型地区电极供电问题,同时极大提高了生产效率,野外勘探数据质量也大幅提高,取得了较好的应用效果.
Abstract:
In gobi region of Xinjiang, annual rainfall is rare, water evaporation is strong, surface is dry, and hence it is easy to form a thin layer of dry Quaternary matter accumulation. High-power induced polarization geophysical prospecting requires a higher current, and electrode grounding resistance is often buried in a dry surface and is often quite large, which causes great difficulty in power sup-ply. To effectively solve this problem and achieve the feasibility of high-power IP exploration, the authors took into account the increase of production efficiency, consulted the results of previous studies as well as production experience and, on such a basis, summed up and implemented a method for improving grounding resistivity in the dry thin-layer loose surface area, i.e., the use of wet soil buried porous sheet electrodes. The application of this method not only solves the problem of electrode power supply in such a region but also improves the efficiency of production. In addition, field exploration data quality is significantly improved and good effects can be a-chieved.
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