... 煤矿 coal mine 煤砾 coal pebble 煤岩学；煤相学 coal petrography ...
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煤砾岩 coal breccia
砾煤 [矿物] pebble coal
泥煤角砾岩 peat breccia ; peat slime
煤角砾岩 [地质] coal breccia
煤炭沙砾河床 coal outcrop
·2,447,543篇论文数据，部分数据来源于NoteExpress
第四纪底砾层直接覆盖在谢桥煤矿煤系地层之上，其隔水性能影响到防水煤柱的合理留设。
The main target coal seam of Xieqiao Mine is directly covered with the Quaternary bottom gravels, whose impermeability affects the reasonable retainment of waterproof pillar.
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