نتایج جستجو برای: rock phosphate
تعداد نتایج: 142334 فیلتر نتایج به سال:
Journal:
:Minerals
2021
Red shale is widely distributed among the deep mine areas of Kaiyang Phosphate Mine, which biggest underground phosphate China. Because effect various factors, such as high stress, ground water and so on, trackless transport roadways in were difficult to effectively support for a long time by using traditional supporting design methods. To deal with this problem, some innovative works carried o...
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