问题
单项选择题
光面爆破的质量标准说法中错误的是（）。
A.围岩面上留下均匀眼痕的周边眼数应不少于其总数的50％
B.超挖尺寸不得大于150mm，欠挖不得超过质量标准规定
C.围岩面上不应有明显的炮震裂缝
D.爆破应采用直眼掏槽，以提高爆破效率
答案
参考答案：D
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光面爆破的质量标准说法中错误的是（）。
A.围岩面上留下均匀眼痕的周边眼数应不少于其总数的50％
B.超挖尺寸不得大于150mm，欠挖不得超过质量标准规定
C.围岩面上不应有明显的炮震裂缝
D.爆破应采用直眼掏槽，以提高爆破效率
参考答案：D
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