... stratification ratio 成层比 rock stratification 岩层层理 ; 岩石层理 gradational stratification 渐变成层 ; 非递变成层 ...
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... stratification ratio 成层比 rock stratification 岩层层理 ; 岩石层理 gradational stratification 渐变成层 ; 非递变成层 ...
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... indirect stratification 次级层理 rock stratification 岩层,岩石层理... density stratification 密度分层作用...
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Most rock roof of roadway is sediment rock, so its intensity is low, the stratification is a common rock mass structure in coal mines.
煤巷顶板多数是岩体强度较低的沉积岩，层状岩体结构是沉积岩的主要特征之一。
Based on theory of composite rock beam, a function and a formula for stratification plane gliding was deducted.
根据复合岩梁理论，推出了开采沉陷中层面滑移函数和层面滑移判断式。
According to the problems above, the waste rock fill mining method with the upward slitting stratification is put forward.
针对上述主要问题，提出采用上向分条分层废石充填采矿法。
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