چکیده مقاله
The present paper mainly deals with the prediction of blast induced ground vibration level in Bakhtiary formation at intake of waterway system in Gotvand dam, Iran For this research the ground vibration components were recorded carefully by means of 3 sets of vibration monitors for 32 blasts during bench blasting in front of tunnels Then, the data pairs of scaled distance and particle velocity were analyzed by using the USBM equation At the end of the statistical evaluations, a relationship between peak particle velocity and scaled distance for this site was established with good correlation Again, other data measurements during tunnel excavation near concrete structures were used to validate the predicted PPV and optimize the blasting patterns to omit the effects of resonance and vibration in USBM RI 8507 standard Based on the vibration tests done in Bakhtiary conglomerate, ground vibration induced by underground blasting is at least 3times greater than vibration induced by bench blasting in the same rock, so constant dynamic factors of the rock mass Bakhtiary conglomerate which are related to vibration velocity are changed between 350 420 and 1 63 0 955
کلیدواژهها
نویسندگان
Reza Nateghi
Rock Mechanic Engineer Technical Department of Upper Gotvand Dam –Sepasad Engineering Co
شیوه ارجاع
Nateghi, Reza,1390,Minimizing Negative Effects of Blasting on underground Structures,09th Iranian Tunneling Conference,Tehran
ارائهشده در
مجموعه مقالات نهمین همایش ملی تونل10 آبان 1390 · تهران