The theory of differentia gives us the cut-through explanation to the juvenile crime in Macao.

差异接触理论最能解释澳门的青少年犯罪问题。

One time blasting of deep and medium holes was applied for the cut through raise and smooth surface blasting was used for the stope periphery and upper wall to ensure the stope safety.

采场切割井用中深孔一次爆破技术 ，采场周边及上盘则采用光面爆破技术 ，确保采场稳定。