CAJ | 학술논문

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。
절삭궤리모형시연구암석찬진절삭과정중적절삭력이급절삭열적기출。재분석암석절삭궤리모형적기출상，기우마이이론화렬문확전이론，분석중경암석절삭상태，인위재중경암석절삭과정중암석존재착취성절삭화연전성절삭2충방식，재차기출상득도신적중경암석절삭궤리모형。이사암、대리암화화강암위찬진대상，개전미찬실험연구。결과표명：절삭과정위암석재도구적뉴구화추진력작용하발생파배，도치소암설、대절설불단순배산생적과정，소대절설형성주요원우암석제압변형화렬문생성확전。실험결과여암석절삭궤리표현출교호적일치성。
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.