In addition, collapses within the mines had to be guarded against, as well as the effect on the lungs of dust from excavation with explosives and drilling, "recalls Chang, who retired from Taiwan Metal Mining Company in 1986 and suffers from mild pneumoconiosis.
此外還要防範坑內土石崩落，以及爆破鑽孔的灰塵對肺部的影響，」1986 年從台金公司退休，罹患輕微塵肺病的張高用，語帶感慨地回顧那段歲月。