the under stratum, calcareous sandrock and conglomerate rock, generate dissolution of groundwater.
其下部钙质砂（砾）岩在地下水作用下产生溶蚀现象。
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东营凹陷岩性油气藏主要为砂岩透镜体油气藏和砂岩上翘尖灭油气藏。
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sound shoot in course of sandrock failure at stope top and floor is of twin - peak character.
大姚铜矿采场顶底板砂岩在破坏过程中声发射具有双峰性，主破裂前存在声发射相对平静现象。
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二是配重材料可以就地取材，利用遍布各地的价廉的砂石。
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sand-sandrock vadose zone structure spreads widely in the north of the erods basin.
风积沙覆基岩型包气带结构在鄂尔多斯盆地北部分布面积最广。
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It passes mainly through the purple -- color soft sandrock and mudstone in Triassic or Dyas Systems.
隧道主要通过三迭系、二迭系 紫红色 软质砂岩、泥岩岩层.
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Sound shoot in course of sandrock failure at stope top and floor is of twin-peak character.
大姚铜矿采场顶底板砂岩在破坏过程中声发射具有双峰性,主破裂前存在声发射相对平静现象.
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The landslide mainly distributed in Cretacic sandrock area in Helong city.
和龙市地质灾害主要为泥石流,其次是崩滑灾害.
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