The practice pointed out that the method of destressing at roof is superior to reinforcement methods in both technique and economics, it has opened up a new way to maintain large chambers in soft stratum.

  • 实践表明:顶部卸压法无论在技术上还是在经济上都优于加固法,它为软岩大断面峒室的维护开辟了一条新的途径。

  • 互联网摘选 2025-01-19 22:19:56

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