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中文摘要：
根据岭澳核电站二期工程基岩爆破现场进行的4组声波试验，并基于爆前爆后声波波速变化率确定的损伤门槛值得到了各次爆破岩体的损伤范围。研究结果表明，周围岩体在爆孔的装药区段深度范围内，损伤程度最大，而近地面和爆孔底部以下的岩体损伤则较小：距爆区越近，岩体损伤变量越大，爆孔底部以下的损伤深度也越大；爆破作用下岩体的损伤深度要小于水平方向的损伤范围，其比例大约为1：3；岩体的损伤范围随单孔药量增大的趋势咀显。
英文摘要：
Four groups of sonic wave tests have been performed in the bedrock blasting excavation at the Ling＇ao nuclear power station project of Guangdong Province, China. The changes of sonic wave speed before and after the detonation are obtained. Based on the relationship of sonic wave changing ratio and the critical damage parameter, the damage extention of each blast and sonic wave test is determined. It is found that surrounding rock in the depth of charging section is the most seriously damaged. In the area adjacent to the ground and beneath the bottom of the charge hole, the rock is less damaged under blasting. The damage parameters and depth under the bottom of charge holes increase clearly with the decreasing distance from the donation. It has also been observed that the horizontal damage distance of rock under explosion is approximate 3 times of the damage depth. The blast-induced damage extention distinctly increases with the single charge weight.
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