(28.56701.236.7261.7285.7419)
煤矿-煤矿是人类在开掘富含有煤炭的地质层时所挖掘的合理空间,通常包括巷道,井峒和采掘面等等。煤是最主要的固体燃料，是可燃性有机岩的一种。当煤层距地表的距离很近时，一般选择直接剥离地表土层挖掘煤炭，此为露天煤-meikuang</br> generated by yvsou girl
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(28.56701.236.7261.7285.7419)
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(28.56701.236.7261.7285.7419)