rock stratum

基本解釋

An aquifer is a water-bearing rock stratum such as sandstone and chalk.
地下蓄水層是一些有水的巖石層，如沙巖和白堊巖。
Grouting is a rock-stratum strengthening method that fill up the voids and fractures with cement or other materials.
注漿是將水泥或其它材料注入巖土躰縫隙中的一種巖層加固方法。
According to the difference of water-bearing rock stratum, sectional pumping testing is adopted, and permeability coefficients are calculated in different burying depth section.
隧道設計與施工，查明圍巖巖層的透水性十分必要，該深埋隧道勘探工程，根據(jù)含水巖層的差異，採取分段抽水試騐方法，計算出不同埋深段的巖層滲透系數(shù)。