極細砂巖 的英文怎麼說
中文拼音 [jíxìshāyán]
極細砂巖
英文
hone-
The test results show that the drawing interval of 1. 5 m is helpful for controlling dead - unconsolidated thin sandstone of coal seam roof and reduce sand ratio of drawn top - coal
試驗結果表明，放煤步距採用三采一放有利於控制頂板極鬆散細砂巖，降低放出頂煤的含砂率。Thus it became well - known for frequent geologic - disaster and landslide in the stratum area. xigeda soft rock is made up from minute sandstone, mud siltstone, siltstone mud and mudstone. it is inland fluviolacustrine phase deposit rock with rhythm - cyclic character of depositional geology
昔格達組極軟巖屬內陸靜水河湖相沉積，主要由粉細砂巖、泥質粉砂巖、粉砂質泥巖和泥巖組成，具有明顯的沉積韻律特徵。In order to optimize the parameters of running top coal under different coal and gangue fragmental size, on the basis of measuring and analyzing the distribution character of top - coal fragmental size, running top coal was studied for the coal seam with dead - unconsolidated thin sandstone roof by loose medium model experiment
摘要為了優化不同煤矸塊度條件下的放煤工藝參數，在實測分析頂煤破斷塊度分佈特點的基礎上，採用散體模型試驗的方法對煤層頂板為極鬆散細砂巖條件下的放煤工藝進行了研究。
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