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。
Results indicate that the residual stress is useful to form the cracks between the shot-holes for smooth blasting, but not for pre-split blasting.
结果为：原岩应力的存在有利于光面爆破的炮孔间贯通裂纹的形成，不利于预裂爆破的炮孔间贯通裂纹的形成。
Results indicate that the residual stress is useful to form the cracks between the shot-holes for smooth blasting, but not for pre-split blasting.
结果为：原岩应力的存在有利于光面爆破的炮孔间贯通裂纹的形成，不利于预裂爆破的炮孔间贯通裂纹的形成。
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