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The entire field of construction-induced vibrations - including advances in earthquake engineering, nuclear blast protective design, and construction and mine blasting - is covered in this work. Frequency of vibration and strain form the foundation for the presentation of the material.
Several underground mines are being worked at a depth of 30-150 m from operating surface mines. Under such conditions, ground vibration from surface blasting may be a potential threat to the stability of adjacent underground mines. The book deals with a new innovative concept of classifying the blast induced damage to underground workings and structures due to surface blasts as 'Severe', 'Moderate' and 'No damage' by measuring the blast induced vibration. Predictor equations have been discussed to estimate ground vibration accurately and reliably. The advantages of the site-specific scaling law are discussed. The prediction efficacy of statistical tool has been compared with that of artificial network techniques. 144 finite element models of underground workings and structures using ANSYS-ANSA-LS_DYNA combined software have been developed and analysed. A new approach is proposed to classify blasting damage using the concept of ' Blast Damage Factor' and linear discriminant functions. Site-specific charts between weight and distance have been developed so that blasting at a surface mine can be conducted without causing damage to adjacent underground mine workings and structures.
This book presents the principles and practices of rock blasting for underground hard rock mining. It covers a theoretical background of the rock blasting technology and comprehensive case studies on different stages of rock blasting for underground metalliferous mining. It includes the discussions on burn-cut face blasting pattern, slot raise excavation methodology, and ring blasting methods. It further discusses different practical challenges associated with underground blasting, viz. ore dilution, ground vibration, wall instability, etc., and their possible solutions. The book also covers the recent advancements in methodologies to predict blasting outcomes and instrumentations for monitoring rock blasting operations. The book is a useful reference for rock blasting practitioners, mining engineers, professionals, and researchers. It is also a valuable reference for undergraduate and postgraduate students.
Rock Blasting and Explosives Engineering covers the practical engineering aspects of many different kinds of rock blasting. It includes a thorough analysis of the cost of the entire process of tunneling by drilling and blasting in comparison with full-face boring. Also covered are the fundamental sciences of rock mass and material strength, the thermal decomposition, burning, shock initiation, and detonation behavior of commercial and military explosives, and systems for charging explosives into drillholes. Functional descriptions of all current detonators and initiation systems are provided. The book includes chapters on flyrock, toxic fumes, the safety of explosives, and even explosives applied in metal working as a fine art. Fundamental in its approach, the text is based on the practical industrial experience of its authors. It is supported by an abundance of tables, diagrams, and figures. This combined textbook and handbook provides students, practitioners, and researchers in mining, mechanical, building construction, geological, and petroleum engineering with a source from which to gain a thorough understanding of the constructive use of explosives.