爆破振动对岩质边坡累积损伤影响实验研究
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摘要
通过观测同一地点岩体多次爆破前、后岩体的声速以及爆破振动速度峰值变化规律,由声速测试结合爆破振动测试数据结果计算出岩体损伤系数,实测数据的对比和计算结果表明:在多次爆破振动损伤累积的条件下,爆破振速随岩体的声速呈指数关系衰减。并由声速测试结果确定了边坡在爆破振动作用下的损伤阈值。
Through the observation on change rules of sound speed and blasting vibration peak velocity in the same point before and after blasts,the damage coefficience of rock mass was calculated by combining the sound speed and the monitored results of blasting vibration.The monitored and calculated results show that on the condition of the cumulative damage of blasts,the blasting vibration attenuated exponentialy along with the sound speed of rock mass.And the damage threshold of rock slope under blasting vibration was defined by the results of sound speed measuring.
Through the observation on change rules of sound speed and blasting vibration peak velocity in the same point before and after blasts,the damage coefficience of rock mass was calculated by combining the sound speed and the monitored results of blasting vibration.The monitored and calculated results show that on the condition of the cumulative damage of blasts,the blasting vibration attenuated exponentialy along with the sound speed of rock mass.And the damage threshold of rock slope under blasting vibration was defined by the results of sound speed measuring.
引文
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[3]朱传云,喻胜春.爆破引起岩体损伤的判别方法研究[J].工程爆破,2001,7(1):12-16.
[4]孟吉复,惠鸿斌.爆破测试技术[M].北京:冶金工业出版社,1992.
[5]闫长斌.爆破作用下岩体累积损伤效应及其稳定性研究[D].中南大学博士论文,2006.
[6]朱传云,卢文波,董振华.岩质边坡爆破振动安全判据综述[J].爆破,1997,14(4):13-17.
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