老顶初次来压步距与老顶岩层的 ______ 、 ______ 、 ______ 有关。 -题库考试答案搜索网

老顶初次来压步距与老顶岩层的、、 __ 有关。

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2021-09-02 15:22

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力学性质@#@ 厚度@#@ 破断岩块之间相互咬合的条件

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标签：联大河南理工大学矿山测量学

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