| 李旭庆.几内亚某超大型铝土矿含水地层钻探取样技术[J].地质与勘探,2012,48(2):374-378 |
| 几内亚某超大型铝土矿含水地层钻探取样技术 |
| Sampling Technique of Drilling in Aquiferous Strata at a Super-Large Bauxite Deposit in Guinea |
| 投稿时间：2011-07-26 修订日期：2011-12-26 |
| DOI： |
| 中文关键词: 钻探取样 含水地层 铝土矿 几内亚 |
| 英文关键词: sampling in drilling,aquiferous strata,bauxite deposit,Guinea |
| 基金项目:中国电力投资集团公司铝土矿勘探项目(编号:CPG-GN-20090301、CPG-GN-20090305)资助 |
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| 中文摘要: |
| [摘 要] 为解决在几内亚某特大型铝土矿矿区部分含水区域中钻探施工中出现的取样困难的问题,通过对含水钻孔地层的地质特征分析,将其分为三种类型,并据此研制和试验了两种不同的取样钻具:护带型螺旋钻具和可启闭防抽吸钻具。经过现场实验证明,护带型螺旋钻具适宜于第一种地质特征的钻孔,可启闭防抽吸钻具适宜于第二、三类地质特征的钻孔。在施工应用中,解决了在该矿区这类地层中钻探取样问题。 |
| 英文摘要: |
| Abstract:Geological characteristics of the drilled aquiferous strata at a super-large Guinean bauxite deposit were investigated to address the sampling
problems encountered during the drilling process. The aquiferous strata of this area can be classified into three categories,based on which,two different
sampling devices were developed and tested,i. e. ,spiral drilling tool with ring quard and drilling tool of anti-suction with switchable mouth downside. The site tests indicate that the spiral drilling tool with ring quard is fit for the boreholes with the first category of geological features,while the drilling tool of anti-suction with switchable mouth downside is fit for the boreholes with the second and third category of geological features. These drilling tools have tackled difficulties in sampling of such strata in this deposit area. |
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