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煤层中夹石层(夹矸)形状比较复杂,就岩性来说是多种多样的,常见的是粘土岩、炭质泥岩或粉砂岩,有时为石灰岩、硅质岩、油页岩、细砂岩甚至砾岩。一般认为,煤层夹矸是沉积过程中的夹层。是植物遗体堆积速度和沼泽水面上升速度之间出现“不足补偿”造成的,即“当沼泽水面上升速度大于植物遗体堆积速度时”,“沼泽水
In the coal seam, the gravel layer (clip gangue) is rather complex in shape and is varied in terms of lithology. Commonly, clay rock, carbonaceous mudstone or siltstone, sometimes limestone, silicalite, oil shale, fine Sandstone and even conglomerate. It is generally believed that coal seams are the interlayer during the deposition. Is the result of “inadequate compensation” between the accumulation rate of plant remains and the rising speed of the marsh water, that is, “when the rising speed of the marsh water is greater than the deposition rate of the remains of the plant,” "