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论述了南芬铁矿胶带运输系统硐室的绘松动圈测试过程,分析了测试成果。并根据松动圈支护理论进行了支护设计
Discusses the test of the loose ring of the chamber in the nanfen iron belt transportation system and analyzes the test results. According to loose ring support theory, the support design was carried out