In the residual coal mining, the retaining and non-mining pillars in the mined area in the past are for resumption of mining.
残煤开采是将过去已开采区留下的煤柱、不可采的煤柱，再进行复采。
The coal body around mining area can be divided into two parts: the elastic area and the non-elastic area, where the latter does not have water-resisting function.
采场附近煤体划分为弹性区和非弹性区，但非弹性区不具有隔水性能。
The coal body around mining area can be divided into two parts: the elastic area and the non-elastic area, where the latter does not have water-resisting function.
采场附近煤体划分为弹性区和非弹性区，但非弹性区不具有隔水性能。
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