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(一) 鑽進中,軸心壓力掌握的是否合適,對於提高鑽進效率有很大关系。單位面積壓力小(指仍大於岩石臨界抗壓强度),合金壓進岩石淺,效率不高;而單位面積壓力等於或小於岩石臨界抗壓强度的時候,便不能進尺。因此,在這兩種情況下都不能提高效率。從理論上來说,軸心壓力越大、效率越高。但是,由於機器和工具的限制又不能無限制地加大壓力。因為,壓力過大固然合金壓進岩石深,但可能损壞機器和工具,同時也容易造成過度的孔彎。所以若想從軸
(A) drilling, axial pressure control is appropriate for improving the drilling efficiency has a lot to do. The pressure per unit area is small (still greater than the critical compressive strength of the rock), alloy shallow pressure into the rock, the efficiency is not high; and the unit area pressure is equal to or less than the critical compressive strength of the rock, they can not footage. Therefore, efficiency can not be improved in either case. In theory, the greater the axial pressure, the higher the efficiency. However, pressure can not be unlimitedly limited due to the limitations of machines and tools. Because, the pressure is too high Although the alloy into the rock deep, but it may damage the machines and tools, but also easily lead to excessive bending. So if you want from the shaft