Search Results - "Sanchidrián, J.A."

A review of development of better prediction equations for blast fragmentation by F. Ouchterlony, J.A. Sanchidrián

“…The paper reviews the development of prediction formulas for the fragmentation from bench blasting. Much attention has been paid to the Kuz-Ram model, its…”
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Detection of potential overbreak zones in tunnel blasting from MWD data by Navarro, J., Sanchidrián, J.A., Segarra, P., Castedo, R., Costamagna, E., López, L.M.

“…•A new methodology is developed to calculate the area excavated on the contour perimeter by blasting effect.•A normalization procedure of the MWD data is…”
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Near-field frequency attenuation of vibrations from blasting using a full-field solution by Gómez, S., Sanchidrián, J.A., Segarra, P.

“…This study analyses the frequency content of vibrations from blasting in the near field using a vibration prediction model called full-field solution (FFS)…”
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The influence of some blasting techniques on the probability of ignition of firedamp by permissible explosives by Sanchidrián, J.A., López, L.M., Segarra, P.

“…The ignition of firedamp by permissible explosives is assessed by means of gallery testing conducted by the Bruceton up-and-down method. Six test series were…”
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A full-field solution to predict vibrations in the presence of a free surface by Gómez, S., Sanchidrián, J.A., Segarra, P.

“…Blasting is a common activity in mining that can cause significant damage in the remaining rock mass. The most commonly used method for predicting vibrations…”
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Full-field solution from an oblique shock to estimate ground motion from blasting by Gómez, S., Sanchidrián, J.A., Segarra, P.

“…The full-field solution (FFS) of the seismic radiation from a blasthole is refined with the use of a source function consistent with the shock physics on the…”
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Estimation of Jones-Wilkins-Lee parameters of emulsion explosives using cylinder tests and their numerical validation by Castedo, R., Natale, M., López, L.M., Sanchidrián, J.A., Santos, A.P., Navarro, J., Segarra, P.

“…A microspheres-sensitized emulsion explosive, to be used in rock blasting tests, is characterized by means of the cylinder test. This test measures the…”
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Assessment of drilling deviations in underground operations by Navarro, J., Segarra, P., Sanchidrián, J.A., Castedo, R., López, L.M.

“…At present, modern jumbos equipped with MWD (Measure While Drilling) provide the position of the blastholes collar and, from the drill length and the azimuth…”
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Coupling of blasting seismographs to rock and its effectiveness for horizontal ground motion by Segarra, P., Sanchidrián, J.A., Castedo, R., del Castillo, I.

“…In order to clarify the requirements for satisfactory coupling on rock, six methods to monitor vibrations with blasting seismographs are investigated in the…”
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Performance of some coupling methods for blast vibration monitoring by Segarra, P., Sanchidrián, J.A., Castedo, R., López, L.M., del Castillo, I.

“…Field guidelines and recommendations for blasting vibration monitoring on a hard surface, suggest that the geophone mount should be coupled to the ground in a…”
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Prediction of near field overpressure from quarry blasting by Segarra, P., Domingo, J.F., López, L.M., Sanchidrián, J.A., Ortega, M.F.

“…This paper investigates the propagation of airblast or pressure waves in air produced by bench blasting (i.e. detonation of the explosive in a row of…”
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On the accuracy of fragment size measurement by image analysis in combination with some distribution functions by Sanchidrián, J. A., Segarra, P., Ouchterlony, F., López, L. M.

“…Summary Size distributions of fragments of crushed rock in conveyor belts and of blasted rock in a muckpile obtained by sieving are compared with the size…”
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Air blast resistance of full-scale slabs with different compositions: Numerical modeling and field validation by Castedo, R., Segarra, P., Alañon, A., Lopez, L.M., Santos, A.P., Sanchidrian, J.A.

“…This paper investigates the advantages and accuracy of a finite element simulation of a blast loaded full-scale slab by validating the results with the…”
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Energy components in rock blasting by Sanchidrián, José A., Segarra, Pablo, López, Lina M.

“…Ten production blasts and one single-hole confined blast have been monitored in two quarries in order to assess the measurable forms of energy in which the…”
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On the mutual relations of drill monitoring variables and the drill control system in tunneling operations by Navarro, J., Sanchidrian, J.A., Segarra, P., Castedo, R., Paredes, C., Lopez, L.M.

“…•The performance of the rig control system for jumbos with percussive-rotary drilling is studied.•More than 65,000 MWD signals for 11 different working…”
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On the prediction of mucking rates in metal ore blasting by Segarra, P, Sanchidrián, J. A, López, L. M, Querol, E

“…A model for the calculation of the productivity of cyclic excavators is developed. The production rate results as a product of an ideal, maximum, productivity…”
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