孔深 [
kǒng shēn]
hole depth
- 栈道石孔多呈四方形,孔径20厘米见方,孔深30厘米左右,孔距130—200厘米。
Plank road-square-Duocheng, diameter 20 cm square, about 30 cm deep hole, Kongju 130-200 cm . - 根据实测的不同深度的曲线变化,确定了替代的测试孔深及突出临界值。
Through the utilization of actual data curve variation of differing hole depths, the critical value of the testing depth and inrush can be determined. - 运用气举反循环钻进,在满足一定条件下适当增加双壁钻具长度即可得到较大钻进孔深。
Apply air reverse circulation drilling, appropriate increase length of twofold wall drill tools under certain conditions, may be drilling much deeper.
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