Based on the similar simulation model experiment, the three forms of the bridge arch, semi_arch and pillar on the top coal caving and drawing characteristics are put forward.

  • 运用相似材料模型试验,提出了顶煤冒放的桥拱式、半拱式和柱式3种结构特征;

  • 互联网摘选 2025-01-20 00:03:19

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