| 组合切削具产生的预破碎区对钻进效果的影响 |
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| 引用本文： | 鄢泰宁,段隆臣,Р.К.波格丹诺夫,И.А.斯维什尼科夫. 组合切削具产生的预破碎区对钻进效果的影响[J]. 探矿工程, 2010, 37(12): 5-8 |
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| 作者姓名： | 鄢泰宁 段隆臣 Р.К.波格丹诺夫 И.А.斯维什尼科夫 |
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| 作者单位： | [1]教育部岩土钻掘工程中心,湖北武汉430074 [2]中国地质大学武汉工程学院,湖北武汉430074 [3]乌克兰国家科学院超硬材料研究所,乌克兰基辅04074 |
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| 基金项目： | 科技部中乌国际科技合作项目（项目编号：2008DFR70510） |
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| 摘 要： | 从组合切削具将在岩石中产生预破碎区的论点出发,通过实验定量研究了预破碎区深度与掏槽刃切入深度的关系,得出了预破碎区有利于降低岩石强度及岩石破碎能耗的结论,并用生产试验结果进行了验证。提出了孕镶金刚石钻头钻进Ⅶ～Ⅷ级硬岩时仍存在预破碎区和切削、微切削破岩方式,以及预破碎区并非越大越好的学术观点。
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| 关 键 词： | 预破碎区 组合切削具 岩石破碎机理 钻进效果 |
| 收稿时间： | 2010-07-14 |
| 修稿时间： | 2010-07-14 |
Influence of Pre-break Zone Generated by the Combination of Cutting Tools to Drilling Effect |
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| Affiliation: | YAN Tai-ning,DUAN Long-chen,Bogdanof P.K,Cveshikov И.А(1.Engineering Research Center of Rock-Soil Drilling ＆ Excavation and Protection,Ministry of Education of the People＇s Republic of China,Wuhan Hubei 430074,China;2.Faculty of Engineering,China University of Geosciences,Wuhan Hubei 430074,China;3.National Academy of Sciences of Ukraine,Science and Technology Diamond Concern,Kiev 04074,Ukraine) |
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| Abstract: | Based on the view that the combination of cutting tools can produce pre-break zone in rock,this paper quantitatively studies the relationship between the depth of pre-break zone and the cut depth of cutting edge.The results show that the pre-break zone can contribute to reduce rock strength and rock fragmentation energy,which is also verified by the field test results.It gets the following two academic views： there are still pre-break zone,cutting and micro-cutting rock breaking modes when drilling Ⅶ～Ⅷ-class hard rock with the impregnated diamond bit;the view ＂the bigger of pre-break zone,the better of drilling effect＂ is not correct. |
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| Keywords: | pre-break zone combination of cutting tools rock fragmentation mechanism drilling effect |
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