Browsing by Author "Garimella, G.R."

Now showing 1 - 3 of 3

An approach to tap electrical energy from ground vibrations
(American Institute of Physics Inc. subs@aip.org, 2018) Garimella, G.R.; Sastry, V.R.
Electrical Energy Generation has become an important aspect in Power Systems because of incremental demands from citizenry in Electrical Distribution System. Electrical power generation using piezo sensors can efficiently convert unwanted vibrations into direct electricity as a renewable energy source. Blasting operations in mines and quarries always result in ground vibrations, which are of major environmental concern. Studies were carried out in three different limestone mines and two different sandstone formations of coal mines, situated in Southern India, to assess and analyze the seismic energy resulting from the blast induced ground vibrations. In addition, Piezo generator circuits were developed and used in addition to the seismographs at different distances, from short to long range, in all mining locations, to tap the ground vibrations. In total, Electrical energy was tapped from 66 blast induced ground vibrations in limestone formation and 41 blast induced ground vibrations in sandstone formation, using piezo sensor based piezo generators developed. The range of voltage tapped from ground vibrations is up to 4531.42mV in limestone formation and 4277.51mV in sandstone formation. Â© 2018 Author(s).
Assessment of seismic energy obtained from blast induced ground vibrations using signal processing computation techniques
(Institute of Electrical and Electronics Engineers Inc., 2017) Sastry, V.R.; Garimella, G.R.
Enhanced demand for coal and minerals in the country has developed an interest on the environmental problems, which may have potential harm and cause disturbance. Ground vibrations generated due to blasting operations in mines and quarries are very important environmental aspect to be looked into by the researchers. It is clear that a small amount of total explosive energy is being utilized in blasting for breakage of rock mass while the rest is being wasted. The amount of energy which is wasted causes various environmental issues such as ground vibrations, air over pressure and fly rock. Ground vibrations caused by blasting cannot be totally eliminated, yet they can be minimized as far as possible through a suitable blasting methodology. Considerable amount of work has been done to identify ground vibrations and assess the blast performance in terms of the intensity of ground vibrations. However, not much research has gone into the seismic energy and utilizing this energy in understanding performance of blast rounds. In this paper, an attempt was made for the estimation of seismic energy dissipated at different distances from the blast site using Signal Processing Techniques with the help of DADiSP and Advanced Blastware software in three different formations, viz. Limestone, Sandstone and Underground Coal Mine. In total, 116 blast vibration events from Limestone Mines, 96 blast vibration events from Underground Coal Mine and 43 blast vibration events from Sandstone Mines were collected using ground vibration monitors for Signal Processing Analysis of Seismic Energy. Blast induced ground vibrations were recorded in three orthogonal directions collecting 2100-2500 particle motion samples for each. Â© 2016 IEEE.
Signal processing computation based seismic energy estimation of blast induced ground vibration waves
(Institute of Electrical and Electronics Engineers Inc., 2016) Sastry, V.R.; Garimella, G.R.
Study of ground vibrations resulted from blasting operations in mines and quarries is significant ecological aspect. In general, very lesser amount of explosive energy will be utilized in blasting process for breakage and creation of fragmentation, however the remaining will be squandered in the form of shock waves. Shock waves resulted from blasting operations cannot be entirely abolished, nonetheless can be lessened to the extent possible using an appropriate blasting methodology. Substantial work has been performed to detect ground vibrations for assessing the blast performance using the intensity of ground vibrations. Nevertheless, not much research has carried in the estimation of seismic energy and utilizing this energy for assessing the performance of blast rounds. In this paper, a Signal Processing based technique for the estimation of seismic energy dissipated at various distances is proposed. In total, 116 blast vibration events from Limestone Mines, 96 blast vibration events from Underground Coal Mine and 43 blast vibration events from Sandstone Mines were collected and respective signal processing analysis was carried out using Advanced Blastware and DADiSP software. Each vibration event in one direction carries about 2500 particle motion samples. Â© 2016 IEEE.