首页/ 题库 / [填空题]煤层被采动后,各种巷道和工作面周围岩体内的答案

煤层被采动后,各种巷道和工作面周围岩体内将发生应力重新分布,其应力集中系数一般可达 ______ 或 ______ 。

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2021-09-02 15:22
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2~3@#@ 4~5

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煤层被采动后,各种巷道和工作面周围岩体内将发生应力重新分布,其应力集中系数一般可达 ______ 或 ______ 。
采空区上方一部分岩层重量将由工作面前方和采空区周围的未采煤体承担,从而引起采空区周围岩体内的应力重新分布,在煤体内形成()。
巷道开掘后,地下岩体的原始应力被破坏,形成了(),如果集中应力大于围岩强度,就需要靠()来提高围岩强度和控制()。
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Masters are()solely responsible for all damages or accidents of whatever kind resulting from the navigating or handling of their vessels by day or by night.
采动后采空空间上方的岩层一般都将发生移动,形成3个带是()。
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翻译:With Average or With Particular Average(WA or WPA)()
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