Dams, mine tunnel, shaft, tunnel, River Cross Harbor Tunnel, subway excavation of underground works such as the use of anti-seepage curtain grouting;
水坝、矿山巷道、竖井、隧洞、江河海底隧道、地铁等地下工程开挖时采用注浆防渗帷幕；
It means to the underground mine that the stability to the excavation and support of the roadway is the precondition for the safe production in mine.
对地下矿山开采而言，保证巷道开挖与支护稳定是矿山安全生产的前提。
It means to the underground mine that the stability to the excavation and support of the roadway is the precondition for the safe production in mine.
对地下矿山开采而言，保证巷道开挖与支护稳定是矿山安全生产的前提。
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