Because of these problems such as unstable ore bodies, moderately-stable wall rock, large work-out area, the design proposal of mining these ore bodies by filling-upmethod is presented.
The mining scheme and new technology of sublevel fillingmethod cemented by crushed stone and cement slurry, and the production linking up technique to transit from caving method to filling meth...
研究应用了分段碎石胶结充填采矿方法较好地解决了这一问题,介绍该采矿方案和碎?。
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Conclusion Contrast-enhanced ultrasonography of gastric filling is a simple and practicable ultrasound follow-upmethod after gastric ulcer.