| 全风化花岗岩地层岩芯钻探孔壁稳定性分析 |
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| 引用本文： | 张细才,段隆臣,王红波. 全风化花岗岩地层岩芯钻探孔壁稳定性分析[J]. 工程勘察, 2010, 38(2): 30-32 |
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| 作者姓名： | 张细才 段隆臣 王红波 |
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| 作者单位： | 中国地质大学工程学院(武汉),武汉,430074;广东省工程勘察院,广州,510510;中国地质大学工程学院(武汉),武汉,430074 |
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| 摘 要： | 使用回转钻探取芯工艺的地质勘探中,在遇到全风化花岗岩地层时,易产生塌孔埋钻事故,导致取芯失败。本文对孔壁被水浸泡和未被浸泡两种状态进行了受力分析,探讨了影响孔壁稳定性的一些因素。然后从钻井液、钻具及施工操作三方面提出了使全风化花岗岩孔壁稳定性的措施。通过上述分析,对全风化岩层这些特殊类岩土的钻探工作提供了参考,有利于取芯钻进的顺利进行。
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| 关 键 词： | 全风化花岗岩 岩芯钻探 孔壁稳定性 受力分析 |
Analysis on the stability of borehole wall for core drilling in completely decomposed granite formation |
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| Zhang Xicai,Duan Longchen,Wang Hongbo. Analysis on the stability of borehole wall for core drilling in completely decomposed granite formation[J]. Geotechnical Investigation & Surveying, 2010, 38(2): 30-32 |
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| Authors: | Zhang Xicai Duan Longchen Wang Hongbo |
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| Affiliation: | 1;2;1.Engineering Faculty;China University of Geosciences;Wuhan 430074;China;2.Engineering Investigation Institute of Guangdong Province;Guangzhou 510510;China |
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| Abstract: | When the rotary drilling technique is used in the geological exploration for the completely decomposed granite formation,it is easy to lead the accidents with the wall collapse and burying the drilling tools,which result in the failure of core drilling.The stress analysis under the two states where the borehole wall is immersed in water or not immersed in water is carried out,and some factors to affect the stability of the borehole wall are discussed.Some measures in the aspects of the drilling fluid,the dr... |
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| Keywords: | completely decomposed granite core drilling stability of borehole wall stress analysis |
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