The effect of a blasting vibration from an excavating tunnel on adjacent excavated is great importance for the stability and security twin tunnels. Due to relatively small distance between face concrete lining tunnel, impact could be significant should considered in practical project. In order control scales during excavation one minimize one, research based field-blasting tests performed tunne...

In the process of tunnel excavation, blasting technology is one commonly used excavation methods. The mainly divided into smooth and presplitting blasting. blasting, in order to prevent excessive damage caused by explosive often carried out means uncoupled charging. previous studies, blast hole were placed concentrically, while actual engineering, charge exists form eccentricity. this study, LS...

Blasting operations are the most conventional and frequently used rock breakage approach in field of Civil Mining Engineering. However, side effects induced by blasting may cause severe damages to surrounding areas. Air-overpressure (AOp) is one operations, which defined as air pressure wave generated operation that exceeds normal atmospheric pressure. It can result potential structural damage ...

Blasting lumpiness prediction is one of the most important research contents in engineering blasting. Although traditional KUZ-RAM model widely used, it often overestimates size Therefore, was updated or corrected this paper by simplifying difficult problem statistical burst fragmentation LS-DYNA. Based on theory area measurement method, fitting mechanism machine learning used to study simulati...

Rockfall in open pit mining using explosives is the most method of operation. Also, addition to technical and economic advantages, this extraction produces effects that can have a negative impact area near quarry. The blasting are such as seismic waves produce vibrations, air overpressure (noise), rock throws toxic gases. If intensity extent these not properly anticipated assessed, serious cons...

Supercritical CO2 phase change fracturing technology has been widely used in rock engineering. However, the surface vibration characteristics induced by breaking have not sufficiently studied. In this paper, a model for calculating velocity supercritical was established based on time-domain recursive method, and reliability of verified using LS-DYNA nonlinear finite element software; blasting e...