Akademik Veri Yönetim Sistemi
22nd International Mining Congress and Exhibition of Turkey, IMCET 2011, Ankara, Türkiye, 11 - 13 Mayıs 2011, ss.117-126
The amount of energy spent in mine blasts to just demolish the rocks is not clearly known. In this work, we propose a technique to obtain the plastic to elastic energy ratio, directly available from the seismic field data. We developed a novel approach to define the plasticity and elasticity of the rocks. In other words, we can determine the plastic energy used for fragmentation of the rock and elastic energy spent as vibration, air blast, etc. We extracted the input wavelet from the real data. We convolved (linear-process) this wavelet with the time series containing time-delayed spikes corresponding to each blast in the group, to obtain a synthetic time-series representing the linear behavior, hence the elasticity. The plasticity, on the other hand, is represented by the actual field data. The energy may simply be defined by the sum of the squares of the amplitudes in a time series. Therefore, the ratio of the energies related to the plasticity and elasticity provides the partition of the energy in a mine blast. The ratio so obtained is deduced from the seismic signals. Therefore, this ratio is a measure of the elasticity. The plasticity, on the other hand, is considered as the complementary of the elasticity. A field example of the plastic / elastic ratio (P/E ratio) values is given and the results are discussed.