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The underwater test is now being used routinely to characterise explosives and initiators. However, several outstanding issues regarding the role of confinement and the usefulness of the test results in predicting expected blasting performance require further elucidation. This paper reviews the underlying principles governing the test, and highlights its relative advantages and disadvantages in product development and applications. It deals with topics of energy release, energy partitioning, confinement and efficiency, supported by illustrative examples from tests with various products and geometries. The results are analysed in terms of both the detonation parameters measured and their extension to predicting blasting performance in the field. It is emphasised, that just as with other performance tests, the results and conclusions are only valid under the particular test conditions employed, and over-generalisation of these results can lead to erroneous conclusions.

Jan 1, 1999

The Australian bulk explosives industry has matured significantly over the last five years and it would appear that the rest of the world is following suit. This maturity is characterised by the technical sophistication of modem bulk explosives, an increase in the technical competence of the explosives consumer and a greater openness in the debate on the quality and performance of explosives. The principal mechanism by which these advances have been made is undoubtedly commercial competition in the market place although a new element, technical competition between manufacturers and independent professionals, has and will continue to play an important role in the development of the industry. The relationship between the explosives manufacturer and consumer is necessarily both complementary and competitive. This paper identifies the need for the consumer to take a more prominent role in the critical analysis of the performance of explosives and to use his commercial influence to direct explosives manufacturers at least in the direction required for the future technical development of the industry.

Jan 1, 1990

By P D. Katsabanis

According to Persson(1) steady state detonation along a cylindrical charge can be regarded as a self propagating process in which the axial compressive effect of the shock front discontinuity changes the state of the explosive so that exothermic reaction sets in with the requisite velocity.

Jan 1, 1990

By Joseph A. Meyers

NYC has always been a high-profile target for both foreign and domestic terrorists. Explosives have always been the go-to tool for terrorists to bring about serious physical injury, death, and property damage in our society. Today with the anti-police movement gaining traction in the United States and anarchists groups using homemade explosives against law enforcement and municipalities, it is the responsibility of the explosives industry to ensure that every explosive product on a blasting site is secure. We must prevent the theft of these energetic materials used on projects and sold by vendors so they are not used by these terrorists. We have learned many lessons here in NYC which began with the theft of explosives used for blasting projects in NYC to supply the IRA (Irish Republican Army) 50 years ago. The liability is too significant to take short cuts in securing energetic materials. Over the years through cooperation with all agencies and the industry we in NYC have developed certain proven protocol and procedures we would like to share with the industry. An efficient and effective security plan for the logistic movement of explosives, as well as for the blast site is imperative to keeping the good name of the industry from negative repercussions and possible additional bureaucratic oversight of an industry that is highly regulated and still recovering from the pandemic. Communication, security assessments and transparency with all stakeholders and the Authority Having Jurisdiction (AHJ) will greatly improve the overall security for the blasting project. This SOP (standard operating procedure) will allow the AHJ to become a proactive partner in the security of the blasting project. If the AHJ is not a law enforcement agency, the law enforcement agency specialty unit must be notified and included in all phases of the project. The security for a blasting project with AHJ and law enforcement input starts at the inception of the project when the memorandum of understanding (MOU) is obtained, and involves the AHJ through all steps of the approval process. This includes threat assessments on new and existing structures. SME’s (Subject Matter Experts) must be present at all stages. The blasting industry and regulators must work collaboratively to improve safety, security, and create a dialogue with law enforcement and the AHJ. Relationships are built through trust, teamwork, transparency, and communication and greatly improve the safety of our great country.

Jan 21, 2025

By I Testrow, M Wiggin

Scrutiny of the whole explosives industry has increased as a result of the terrorist attacks on the World Trade Centre and the Pentagon on 11 September 2001 and the bombings in Indonesia, including the Bali bombings last year. This has been highlighted in specific press releases from governing bodies, like the Department of Mineral and Petroleum Resources û Western Australia, on the necessity of being in compliance with regulations for storage of explosives. As a result, audits by inspectors to assess compliance are to be expected. In a proactive move, DynoConsult has assisted several customers through benchmarking current practices, in order to identify any areas of non-compliance to the statutory requirements for explosive storage and security. This paper discusses the outcomes of supplier discussions and customer audits and highlights the implications for the industry.

Jan 1, 2003

By Paul Muehl, Roger Lawrence

The massive sculpture taking place on Crazy Horse Mountain in the Black Hills of South Dakota, may Be the most unique application of precision blasting techniques in the world today, It is certainly the largest sculpture in history. And it is being carved not by the usual artist implements, but by engineering of explosives. This paper presents a review of the blastingasting techniques and challenges of blast earring the largest sculpture in the world,

Jan 1, 1991

By Q Liu, P D. Katsabanis

Dust explosions in underground sulphide and oil shale mines result from the detonation of explosives in the blasting operations. Explosive composition, oxygen balance, priming and ideality of detonation were examined theoretically and experimentally in the presence of reactive sulphide dust. It was found that the temperature as well as the chemical composition of the gaseous products of detonation are the controlling parameters related to the explosive. Non aluminized, oxygen balanced emulsion explosives were proven to be relatively safe, while explosives creating combustible products were proven to be extremely dangerous due to the secondary flame they generate. Since a large number of dusty orebodies are often very friable, low density emulsion explosives are also examined for application in production blasting.

Jan 1, 1991

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Jan 1, 1938

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Jan 1, 1938

By Fred C. Drury

The Explosives Engineer's concern for personnel training in the safe, efficient and effective use of explosives materials has grown in recent years. Available training options have also grown. Today's options include off-site training seminars and in-house training departments, both of which represent significant cost to the smaller producer.

Jan 1, 1981

By M. Gaula

"Gold bearing deposits of the Witwatersrand basin are generally less than 2m thick and require conventional narrow-reef mining methods for extraction and employ explosives as a means of rock breaking. Optimal utilization of explosives is dependent on the overall design of the blast. The under-utilization of explosives arises when shot-holes are drilled inconsistently, overcharged, and when tamping is absent. This can be rectified by emphasizing the importance of good drilling practices as part of induction programmes and refresher courses. The project was aimed at determining whether or not explosives are being optimally utilized at project site. This was investigated through a study of the properties of explosives, mine standards, and recommendations for usage. Underground observations were made to determine whether or not mine standards were being adhered to. Historic data was obtained to establish the historic relationship existing between the quantity of explosives used (kg) and the production output (m2). This was then compared to the quantity of explosives the mine expects to use per unit of production. The results obtained were analysed to determine the presence and extent of over- or under-utilization. It was found that explosives are being under-utilized at the mine. More explosives are ordered than expected per unit of production. The explosives’ properties are not thoroughly exploited during blasting, thereby requiring the use of more explosives than prescribed. Paper written on project work carried out in partial fulfilment of BSc. (Mining Engineering)"

Jan 1, 2015

By Ingvar Bergqvist

El presente texto describe el uso de los explosivos desde el siglo XVII hasta la actualidad, así como los factores a considerar dentro de la minería. Entre estos tenemos la velocidad de detonación, potencia, seguridad en el manejo, estabilidad de detonación, calidades de manejo, densidad, resistencia al agua, congelación y los aspectos médicos. Asimismo, los tipos de explosivos se dividen en los basados en nitroglicerina y los libres de ello, ANFO y slurry.

Jul 1, 1977

By E. Muñiz H

El presente texto describe los explosivos utilizados en la minería subterránea desde la fase de desarrollo hasta la actualidad. Así, el primer explosivo usado para el arranque de rocas en minería fue la pólvora negra. Posteriormente sus aplicaciones se limitan a las actividades lúdicas y bélicas. Luego, se volvió a utlizar la polvóra en la minería hasta mediados del siglo XIX y actualmente las dinamitas sustituyeron a la pólvora negra, reduciendo costos y generando nuevas vías de comunicación

Sep 1, 1984

By Heraldo Artemio Menendez Flores

El presente trabajo describe la aplicación del método de explotación con cámaras paralelas en la Mina El Cofre -en tanto recupera todos los pilares naturales con leyes económicamente explotables que restaban durante la explotación con cámaras y pilares del cuerpo, sacando todo el block mineralizado y levantando el volumen de mineral y la ley promedio mensual.

Sep 14, 2009

By Alejandro Freyre B.

"El presente texto señala el proceso de explotación de la veta Shiusha situada en el distrito de las minas de Huarón. La veta es de origen hidrotermal, cuyo rumbo aproximado es E-W, y su buzamiento varía de 75º N en el Estea 85º N al Oeste, uniformizándose en los niveles inferiores en 85º :N. El eje mayor probable del depósito ( plano Nº. 1 '), tiene una inclinación de 25 º E. El depósito se extiende sobre una longitud de 1100 m, entrelas coordenadas 4600 - 57 00 E., pero la calidad y cantidad del mineral son variables en las tres dimensiones. Asimismo, se describe la prospección, preparación para corte y relleno, arranque, intermedias de los tres compartimientos y la aplicación de gradines descendentes vacíos."

Aug 20, 1963

By K. Vaajoensuu

En los últimos años, la tendencia de la industria finlandesa se basa en concentrar las actividades mineras sobre yacimientos mineralógicos de grandes a pequeños con una disminución continua de la ley. Por ello, la planificación de las operaciones como la técnica usada conllevan requerimiento exigentes con el fin de hacer rentable la mina. En ese sentido, el presente texto señala la importancia de la experiencia de Finlandia en su propia industria minera obliga donde se busca continuar todavía más con el desarrollo de métodos económicos, técnicos y métodos de la organización.

Nov 1, 1981

By Eleuterio Alvino Gutarra

El presente trabajo señala la aplicación del sistema de explotación mecanizada en la mina Baúl de la compañía minera Pativilca. Para ello, se implementó la perforación con anillos para obtener mejores resultados en producción, productividad y costos. Asimismo se describe una reseña geológica, el uso de dicho método, la perforación distribuida en anillos, la voladura, acarreo, extracción, productividad y costos en las minas de tajo abierto.

Nov 8, 1982

By Hans Svensson

El presente texto señala la explotación mecanizada en labores angostas a través de las aplicaciones de la empresa Linden Alimak AB. En 1957. Dicha empresa introdujo el método Alimak para excavación de las chimeneas con su plataforma trepadora, la cual comprende la perforación circular desde la plataforma Alimak para el ensanche de chimeneas, la explotación en vetas Angostas - Vein Mining y preparación de galerías ( jumbos con martillos neumáticos e hidráulicos. Posteriormente se compra una variedad de equipos para jumbos, winches, soldadoras neumáticas, etc., para la minería.

Sep 1, 1977

By Mario Santillán

El objetivo del texto es señalar el aprovechamiento de zonas mineralizadas, cuya explotación por métodos convencionales no tuvo resultados económicos, sino solo a través de un sistema racionalizado de minería sin rieles. En este sentido, la explotación de los block mineralizados se realiza a un nivel mínimo de producción de 150 a 160 T.C.S diarias, donde las rampas de acceso para la explotación de otras vetas se constituyen en una forma integral de explotación. Asimismo se considera el planeamiento operacional a corto, medio y largo plazo, se evalúan las condiciones operacionales, la explotación, método de minado, cargui, extracción, sostenimiento, relleno, las necesidades de personal y selección de equipos y los costos de producción e inversión.

Nov 20, 1978

By Basilio Ponce Pío

La industria minera busca reducir los costos de operación y optimizar la producción a través de una modernización de las operaciones minero metalúrgicas. Bajo esta premisa, la mina Uchuccahua utiliza un nuevo método de explotación denominado "explotación por subniveles con taladros largos". En este sentido, el presente texto señala la aplicación del método a través del block mineralizado de plata llamado "Claudia", cuya explotación alcanza también a las vetas que sean mayores de dos metros. Así también revisa la recuperación de un block mineralizado en la veta Irma Viviana, la cual estuvo abandonada por derrumbes al inicio de la explotación.

Apr 1, 1991