| 小秦岭北矿带厚覆盖层钻探技术研究 |
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| 引用本文： | 张青海.小秦岭北矿带厚覆盖层钻探技术研究[J].探矿工程,2019,46(10):53-57. |
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| 作者姓名： | 张青海 |
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| 作者单位： | 河南省地质矿产勘查开发局第三地质勘查院 |
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| 摘 要： | 小秦岭北矿带上部覆盖层为第四系沉积物，其厚度700～950 m，钻探施工中经常出现卡钻、埋钻、塌孔等恶性事故，甚至造成钻孔报废，严重制约钻探效率，造成钻探成本过高。针对这些技术难点开展技术分析和研究，通过优化钻孔结构，采用适宜该矿区厚覆盖层的绳索取心钻进方法，合理选择护壁性能好的冲洗液等技术措施解决了厚覆盖层钻进难题，提高了钻探施工效率和质量，降低了工程成本。
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| 关 键 词： | 厚覆盖层 钻孔结构 绳索取心钻进 冲洗液 |
| 收稿时间： | 2019/5/28 0:00:00 |
| 修稿时间： | 2019/9/29 0:00:00 |
Drilling technology for thick overburden in the northern mining belt of Xiaoqinling |
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| ZHANG Qinghai.Drilling technology for thick overburden in the northern mining belt of Xiaoqinling[J].Exploration Engineering(Drilling & Tunneling),2019,46(10):53-57. |
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| Authors: | ZHANG Qinghai |
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| Institution: | No.3 Geological Exploration Institute, Henan Brueau of Geo-exploration and Mineral Development |
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| Abstract: | The upper overburden in the northern mining belt of Xiaoqinling is quaternary sediments with thickness from 700 to 950m. Malignant incidents such as bit sticking, bit burial, hole caving often happen in drilling, and even result in the scrapping of the drilling hole, which seriously restricts drilling efficiency, leading to high drilling cost. In view of these technical difficulties, technical analysis and research were carried out. Through optimizing the borehole structure, adopting the wireline core drilling method suitable for the thick overburden in the mining area, properly choosing the drilling fluid with good borehole wall protection, and other technical measures, the difficulty in drilling the thick overburden was solved; meanwhile, the drilling efficiency and quality were improved, and the drilling cost was reduced. |
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| Keywords: | thick overburden borehole structure wire-line core drilling drilling fluid |
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