... 岩石嵌入砂子的强度：RES 岩石破碎效率：rock-breaking efficiency 岩石破碎力学：rock breaking mechanics ...
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This article research has an important practical project significance to develop micro hole well drilling technology, and it is advantageous in raising micro hole rock-breaking efficiency and drilling speed.
本文的研究对提高微小井眼钻头的破岩效率,提高微小井眼钻速,发展微小井眼钻井技术具有重要的工程实际意义。
参考来源 - 提高微小井眼钻头破岩效率的研究·2,447,543篇论文数据，部分数据来源于NoteExpress
Experiment shows the rock breaking efficiency of jet flow impact pressure is enhanced.
实验表明，提高了射流冲击压力的破碎岩石效率。
Through the theoretical and experimental study on rock breaking by submerged water jetting, taking rock breaking efficiency as goal function, the optimum jetting pressure was acquired to break rock.
本文通过对淹没射流破碎岩石的理论及实验研究，以破岩效率作为目标函数，得到射流破岩的最优压力条件。
It is special important meaning that Deep - hole blasting With bottom Gap Charging is used to protect bottom rock from breaking, to decrease block ratio and to improve blasting efficiency.
深孔爆破孔底空隙装药在有效地保护底板岩层免遭破坏，减少大块率，提高爆破效率等方面均具有重要的意义。
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