天然裂隙 meaning in English

intrinsic fracture

Application of gaussian curvature method in forecasting natural fracture zones in coal seam
运用高斯曲率法预测煤层天然裂隙发育区
The way and principle of gaussian curvature method for forecasting natural fracture zones in coal seam are discussed
摘要论述了高斯曲率法预测煤层天然裂隙发育区的基本原理和方法。
According to the criteria , natural fracture zones of no . 3 coal seam are divided into four grades and then the permeability distribution of no . 3 coal seam is preestimated
依据该标准将3号煤层天然裂隙划分为4级发育区，进而预测出3号煤层渗透率的分布概况。
It is concluded that the gaussian curvature method can reflect the shape variation of coal seam curvature , and the method is effective to forecast natural fracture zones in coal seam
分析表明，高斯曲率法可相对真实地反映煤层曲面形态变化，用该方法预测煤层天然裂隙发育区是切实可行的。