| 岩石切削机理模型分析及实验研究 |
| 投稿时间：2014-06-16 修订日期：2014-06-24 点此下载全文 |
| 引用本文：何录忠,周琴,李斌斌,等.岩石切削机理模型分析及实验研究[J].钻探工程,2014,41(9):85-88.HE Lu-zhong,ZHOU Qin,LI Bin-bin,et al. Analysis on Rock Cutting Mechanism Model and the Experimental Study[J]. Drilling Engineering, 2014,41(9):85-88. |
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| 基金项目:月球钻探取样项目“单齿碎岩机理研究”（53200959613） |
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| 中文摘要:切削机理模型是研究岩石钻进切削过程中的切削力以及切削热的基础。在分析岩石切削机理模型的基础上，基于摩尔理论和裂纹扩展理论，分析中硬岩石切削状态，认为在中硬岩石切削过程中岩石存在着脆性切削和延展性切削2种方式，在此基础上得到新的中硬岩石切削机理模型。以砂岩、大理岩和花岗岩为钻进对象，开展微钻实验研究。结果表明：切削过程为岩石在刀具的扭矩和推进力作用下发生破坏，导致小岩屑、大切屑不断循环产生的过程，小大切屑形成主要源于岩石挤压变形和裂纹生成扩展。实验结果与岩石切削机理表现出较好的一致性。 |
| 中文关键词:岩石切削 切削机理模型 切屑 实验研究 |
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| Analysis on Rock Cutting Mechanism Model and the Experimental Study |
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| Abstract:Cutting mechanism model is the foundation of analysis on rock drilling cutting force and cutting heat. The article reveals a new mechanism in medium hardness rock cutting model which based on a molar theory and the theory of crack propagation. The brittleness and ductility cutting exist in medium hardness rock cutting process. Take sandstone, marble and granite for drilling targets, micro-drilling experiments study is carried out. The results show that the rock cutting process means the rock damage taking place under the cutter torque and pushing force and resulting in small debris and large cuttings generated during continuous drilling cycle. Cuttings formation is mainly due to the extrusion deformation and crack generation expansion of rock. The experimental results and the rock cutting mechanism model display good consistency. |
| keywords:rock cutting cutting mechanism model cuttings experimental study |
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