- 1. There is some trouble in the borehole. Don't leave the rig floor.
- 井下出现复杂情况, 不要离开钻台.
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- 2. Borehole hydromining is a kind of safe and efficient new mining method.
- 钻孔水力采煤是一种既安全、又能极大地提高资源利用率的新的采矿方法.
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- 3. But the research on borehole deviation control is very few.
- 但在井斜控制方面的研究还很欠缺.
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- 4. Shear failure is a basic failure mode of borehole rock.
- 井眼剪切破坏是井眼岩石基本破坏形式之一.
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- 5. Horizontal well borehole stability is discussed by experiments in the paper.
- 用物理实验方法来确定井壁稳定性即井壁缩径可能性.
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