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ore pillar for mining
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ore pillar for mining
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工学
回采预留矿柱
释
ore pillar for mining
回采预留矿柱
为保护地表地貌、地面建(构)筑物和主要井巷,分隔采区或矿段,以及防水等而留设不采或暂时不采的部分矿体。煤矿中也称煤柱。
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quadratic magnitude term
quadratic map
quadratic mapping
quadratic mean
quadratic measure
quadratic module
quadratic non-residue
quadratic non-residue modulo m
quadratic optimization
quadratic performance index
quadratic phase array
quadratic polynomial
quadratic programming
quadratic programming problem
quadratic rate of convergence
quadratic rate of increase
quadratic reciprocity
quadratic reciprocity law
quadratic reciprocity theorem
quadratic recurrence equation
quadratic representation
quadratic residue
quadratic residue modulo m
quadratic residue symbol
quadratic residue theorem
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