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Vibration Analysis Basicsrefuge Chambers In Underground Mines

an analytical study of blasting vibration using deep,firstly, the sadov’s formula has been applied to analyzing the monitoring results of the mining roadway, and thus the value of its excavation blasting vibration attenuation index k and (alpha ) and its corresponding regression formula were attained; then, the appropriate regression formula was used to calculate the maximum explosive charge which could ensure the safety of the principal chambers underground the and safety evaluation on chamber blasting of mined,1) according to current situation of the exploitation in paomaping ore, the morphology in mined area and the environment condition surrounding the mined area, the selection of chamber blasting has controlled and reduced the hazard to the buildings and structures on and under the mine brought by blasting in underground hard rock mines,vibrations induced by nearby blasting. hence, old rockbolts which have clearly lost all their tension are frequently seen in underground mines. another problem relates to rusting of the bolts in rock masses with aggressive groundwater, for example, in massive sulphides. sometimes, the life of an unprotected bolt may be less than one.derrick j. chambers -,instrumentation and networks. measure ground vibration •ensure ground support system can handle expected dynamic loads •determine design parameters for nearby surface structures (eg dumps, mills, offices) •enforce ground motion limits for sensitive structures.

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