... 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
煤角砾岩 [地质] coal breccia
·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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