Aiming at the problem of drought and water shortage in north Shaanxi, we analyzed principles for designing room and pillar water-preserved mining method.
针对陕北干旱缺水的实际，分析了房柱式保水开采的设计原则。
Aiming at the problem of drought and water shortage in north Shaanxi, we analyzed principles for designing room and pillar water-preserved mining method.
针对陕北干旱缺水的实际，分析了房柱式保水开采的设计原则。
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