A considerable amount of energy is released in the form of shock wave from explosive charge detonation. Shock wave energy is responsible for the creation of crushing and fracture zone around the blast hole. The rest of the shock wave energy is transferred to rock mass as ground vibration. Ground vibration is conveyed to the adjacent structures by body and surface waves. Geological structures li...

Rockburst events have been a serious problem for many years in mines worldwide, and particular at El Teniente mine Chile. is the largest copper world, located Andes Cordillera where high stress levels are present due to intensing mining activity addition complex geology. Consequently, study management of rockburst threat necessary. In this work, case Diablo Regimiento (DR) within studied. The e...

Ground vibration induced by rock blasting is an unavoidable effect that may generate severe damages to structures and living communities. Peak particle velocity (PPV) the key predictor for ground vibration. This study aims develop a model predict PPV in opencast mines. Two machine-learning techniques, including multivariate adaptive regression splines (MARS) classification tree (CART), which ar...

Loosening of rockmass during its excavation in an infrastructure project is carried by rock blasting. The blast-induced ground vibrations pose a major challenge to the blasting engineers, whose main objective control their potential cause any damage buildings vicinity. research reported this paper explains how error prediction Peak Particle Velocity (PPV) United States Bureau Mines (USBM)-based...

The blast-induced vibration during excavation by the drilling and blasting method has an important impact on surrounding buildings/structures auxiliary equipment. In particular, with development of tunnel engineering, construction attracted extensive attention. Based literature data statistics, this paper first explored performance several commonly used empirical equations in predicting propaga...

Peak particle velocity (PPV) caused by blasting is an unfavorable environmental issue that can damage neighboring structures or equipment. Hence, a reliable prediction and minimization of PPV are essential for site. To estimate tunnel blasting, this paper proposes two neuro-based metaheuristic models: neuro-imperialism neuro-swarm. The was made based on extensive observation data collecting fro...

Exploring a pipeline’s response to blast vibration during tunnel excavation is critical for ensuring the safety of pipeline. In this paper, monitoring and numerical simulation methods are used evaluate dynamic ground soil pipelines blasts. The attenuation law peak particle velocity (PPV) distribution characteristics effective stress (PES) in pipe sections under different working conditions stud...

In the context of conjugated polymers, especially those of the poly (phenylenevinylene) (PPV) family, which are promising candidates as emission material in light emitting devices such as LEDs, field effect transistors and photovoltaic devices, we have, in the present study, prepared MEH-PPV [Poly [2- methoxy-5-(2’-ethyl-hexyloxy)-1,4-phenylen-evinylene] of low molecular weight and low polydisp...

in blasting operations different proportions of the energy released are consumed in fragmenting the rock mass, heating up the surrounding and some portion of it is used in propagating blast waves, causing vibration of the particles in the nearby environment. however, reflections, transmissions and absorptions lead the attenuation of these waves. the influence of the extent of rock-mass disconti...

The blasting vibration has an impact on the rock and soil around hole nearby structures. vibration-isolating slot is one of methods to reduce damage vibration. In this paper, influences depth position isolation PPV (peak particle velocity) attenuation characteristics ground damping effect at different measuring points are studied systematically by LS-DYNA numerical models. results show that rea...