The results, including a actual sample introduced at the end of the paper, indicate that the position of stop line has a significant influence on the safety of support withdrawing work.

  • 结果表明,当工作面位于周期来压期间时,会给支架回撤带来很不安全隐患;

  • 互联网摘选 2025-01-20 13:04:51

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