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岩层分层
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  “岩层分层”译为未确定词的双语例句
     The gradient layer composite board mechanical model of thin base rock shallow seam is advanced in this paper based on the rock structure and mechanical character of the roof. The gradient layer composite board is constituted by all the layers of thin base rock,and the mechanical parameters correspond with the layer,the mechanical character varieties along the thickness direction,and key stratum is composed with the adjacent layers where τ j max
     依据典型薄基岩浅埋煤层覆岩结构及其力学特征,建立薄基岩浅埋煤层覆岩力学模型,弹性基础上的梯度复合板模型,梯度复合板由组成薄基岩的所有分层组成,各层力学参数取对应分层参数,其力学性质沿厚度方向变化,满足τjmax岩层分层,共同组成薄基岩的关键层。
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     METHOD OF DELAMINATED DECOMPACTION CORRECTION
     碎屑岩层分层去压实校正方法
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     social stratification
     社会分层
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     STRATIFIED FUNCTOR
     分层函子
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     Precise computation for random earthquake wave propagation in stratified materials
     分层岩层介质中平稳随机地震波传播的精细解法
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     Strata Mechanics in Coal Mining
     煤矿岩层力学
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A detail introduction of a computer program for calculating the true thichness of different layers of the rock formations drilled and the program flow diagram are given in this paper. It is very helpful for drill logging.

文中对计算岩层分层真厚度的编程过程作了详细的介绍,并给出了程序流程图,以供持各种不同型号的程序型计算器的钻探编录人员使用.

The ages of igneous rocks from North Qinling Fold Belt, measured by the methods of K-Ar, Rb-Sr, U-Ph, (40)Ar-(39)Ar and Sin-Nd, reveal that the magmatism in this region took place in the following five geological periods: about 2000 Ma, 1210~920 Ma, 822~794 Ma, 464~ 360 Ma (O-C1), 195~105Ma(J1-K). In addition, there five groups of metavolcanic-metasadimentary rock s in this region were appropriately distinquished, these are Qinling Group (> about 1700Ma),Kuangpin Group (about 1100Ma),Elangping Group (about...

The ages of igneous rocks from North Qinling Fold Belt, measured by the methods of K-Ar, Rb-Sr, U-Ph, (40)Ar-(39)Ar and Sin-Nd, reveal that the magmatism in this region took place in the following five geological periods: about 2000 Ma, 1210~920 Ma, 822~794 Ma, 464~ 360 Ma (O-C1), 195~105Ma(J1-K). In addition, there five groups of metavolcanic-metasadimentary rock s in this region were appropriately distinquished, these are Qinling Group (> about 1700Ma),Kuangpin Group (about 1100Ma),Elangping Group (about 800Ma), Caotangou or Danfen Group (about 450Ma), the Group of Mesozoic age (abount 200Ma ).

本文通过展示截止1994年北秦岭地区岩浆岩的K-Ar、(40)Ar-(39)Ar、Rb-Sr、Sin-Nd、U-Pb谐和图、单颗粒锆石逐级蒸发(207)Pb-(206)Pb等方法同位素年龄结果,进行综合对比讨论,从而确定这一地区岩浆活动,在早元古末期以后多次发生,直至中生代。它们包括大约2000Ma、1210~920Ma、822~794Ma、464~360Ma(奥陶纪-早石炭世)、195~105Ma(早侏罗世-白垩纪)等五个地质时期。另外,根据北秦岭地区岩浆活动对确定变质岩层分层时限的制约的观点,提出该地区变质岩层划分的五个岩群的时序,首先是秦岭群(大于1700Ma)、然后是宽坪群(1100Ma前后)、二郎坪群(800Ma前后)、草滩沟群或丹凤群(450Ma前后)、中生代岩群(200Ma前后)等等。它们是在不同时期,伴随着某一构造运动旋回形成的变质岩层。所展示的年龄资料同时为读者了解各种同位素年代测定方法的适应性,以及了解在复杂地质构造区域,如何有效开展同位素年代学研究,提供有益经验。

Using bedded medium theory for estimating the surface subsidence in partial extraction. this paper given the major factors of surface subsidence in partial extraction, based on the sensitivity analysis. such as the slice height within several tens m near coal seam and its slice elastic modulus. the width of mined and retained strips, and the length and width of mining area when the size of mining area is small.

本文利用条带开采地表沉陷预计的层状介质理论。在敏感性分析的基础上,给出了条带开采地表沉陷预计的主控因素为:煤层附近几十米岩层的分层厚度和分层弹性模量、采出条带宽度和保留条带宽度,当采区尺寸较小时,还有采区的长度和宽度

 
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