残留煤柱的英文

abandoned coal pillar

residual pillar

• 残留:    remain; be left ov ...
• 煤:    coal
• 残留煤:    liptobiotic coal

例句与用法

1. Practice of mining remained pillars in working area
   采区残留煤柱的开采实践
2. Mine ground pressure appearance and roof control of residual pillaring in upper layer in the mining of lower layer
   上层残留煤柱在下层开采中的矿压显现与顶板控制