Coal deposits, after all, are petrified peat swamps, and peat is made from decaying plants, which leave their imprints in mud and clay as it hardens into shale stone.
毕竟煤炭矿床本身就是石化的泥炭沼泽，而泥炭的成份是腐烂的植物。当粘土泥浆逐渐硬化成页岩石，腐烂的植物则在上面留下了它们的印记。
Through the alteration of water, material unload system and the fabric of filtration, the optimization for coal and mud water system is achieved, work efficiency is raised highly.
通过对过滤机的卸水系统、卸料系统及过滤机滤布的改造，实现了煤泥水系统的优化，大大地提高了过滤机的工作效率。
The coal quality of Xiangxi stage is not good and stable but the coal appears dark mud, well develops shale and has high evolution level, which is favorable to create coal derived gas.
香溪煤系煤质较差，极不稳定，但该煤系暗色泥、页岩发育，演化程度较高，有利于形成煤成气。
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