缓倾斜破碎矿体高效进路充填采矿方法研究与应用
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Research and Application of High-efficiency Drift Backfill Mining Method in Gently Inclined Broken Orebody
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图4. 圆木隔挡施工图(a)和胶结充填体挡墙(b) |
Fig.4. Construction drawing round timber block and cemented filling retaining wall |
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