公路下磷矿开采位移沉降规律分析

Analysis of subsidence rule in the phosphate rock mining area under the highway

贵州省开磷集团用沙坝矿的部分矿体位于金阳公路下,为保护公路而保留的保安矿柱矿石量约2262万t,为矿区储量的50%。采用留竖向矿柱的房柱式分层充填法开采使金阳公路的位移沉降量仅为48.5mm,为公路下矿体开采提供了一种矿石损失率小,位移沉降量小的开采方法。

The part of the ore body of Yongshaba mine,Guizhou province Kailin Group Corporation,occurs under JinYang highway,which is about 22.62 million ton with 50% of the reserves in the mine,used as safety pillar to protect the highway.For the reason,room-pillar slicing-and-filling with vertical pillar mining process was adopted,which makes vertical displacement of the highway being only 48.5 mm.It is for similar mines a reference with small loss rate of ores,displacement small settlement.