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Personne àcontacter Ms. wendy
2#,Xiti, Chengde, Sichuan
Excavating in the hard rock at fractured zone with growing joints, it may cause loosing of fractured rocks and reducing of friction between rocks, resulting in loosing of surrounding rocks in larger area. Finally the stability of surrounding rock is lost and collapsing occurs. In this case, pre-stressed grouted anchor bar is recommended be used to keep its stability by applying enough pre-stress.
