La presente invención proporciona una composición explosiva que comprende entre aproximadamente 2... more La presente invención proporciona una composición explosiva que comprende entre aproximadamente 2 y aproximadamente 25 % p/p de peróxido de hidrógeno, desde más de 0 y hasta aproximadamente 90 % p/p de uno o más oxidantes. La presente invención también proporciona un método para preparar una composición explosiva junto con el uso de dicha composición explosiva de la invención para romper y mover tierra, por ejemplo, en el contexto de operaciones mineras
Field Instrumentation To Measure The Performance Of Low Density (Low Shock) ExplosivesField Instrumentation To Measure The Performance Of Low Density (Low Shock) ExplosivesField Instrumentation To Measure The Performance Of Low Density (Low Shock) Explosives
Composição de explosivo, método para preparar uma composição de explosivo, e, uso de uma composição de explosivo
A presente invenção provê uma composição de explosivo compreendendo de cerca de 2 a cerca de 25% ... more A presente invenção provê uma composição de explosivo compreendendo de cerca de 2 a cerca de 25% em peso/peso de peróxido de hidrogênio, mais que 0 e até cerca de 90% em peso/peso de um ou mais de outros oxidantes. a presente invenção também provê um método de preparar uma composição de explosivo e uso da composição de explosivo da invenção para quebrar e mover solo, tal como em operações de mineração
The present invention provides an explosive composition comprising from about 2 to about 25 % w/w... more The present invention provides an explosive composition comprising from about 2 to about 25 % w/w hydrogen peroxide, from greater than 0 and up to about 90 % w/w of one or more of other oxidisers. The present invention also provides a method of 5 preparing an explosive composition and use of the explosive composition of the invention to break and move ground, such as in mining operations
Geotechnical data collection, core logging and face mapping
JKMRC, May 1, 1999
This report was compiled to provide technical information to practicing engineers and contractors... more This report was compiled to provide technical information to practicing engineers and contractors involved in the collection, management and analysis of geotechnical data. This report also aimed at highlighting the importance of sampling (both quantity and quality) for the development of robust geotechnical models for rock mass characterization purposes.The report was divided into six chapters covering core drilling systems, orientation methods, core recovery, core logging and face mapping, comparison of methods; and borehole logging and related software and hardware
Implementation of leading practice in geotechnical and blasting performance evaluations at the Centinela sulphide mine
Mining Technology, 2016
The Centinela sulphide mine (formerly known as Esperanza Mine) is an open pit sulphide deposit lo... more The Centinela sulphide mine (formerly known as Esperanza Mine) is an open pit sulphide deposit located in Chile's Antofagasta Region, 1350 km North of Santiago. One of the strategic objectives of the mine is to implement productivity improvement projects that can be monitored, adequately quantified and adhere to strict geotechnical requirements. This paper describes the implementation of leading practices to evaluate geotechnical and blasting performance. An approach based on direct measurements was developed and implemented at the mine site. The process involved measurements of near-field accelerations and gas penetration behind pre-split-lines; run of mine (ROM) fragmentation analysis and geotechnical evaluations based on the reconciliation of key geotechnical design parameters, such as bench face angle, berm width, inter-ramp angles and final slope characteristics. A geotechnical evaluation matrix was introduced to rank final results at each monitored location. From a geotechnical perspective, the best results were obtained with some of the lowest powder factor blasts monitored. Fragmentation assessment results showed that plant requirements were still being achieved at these lower powder factors. This helped confirm that in the rock mass domains of interest, reduced powder factors in production rows were more appropriate in order to maintain higher standards of quality in wall control practices.
Engineering Tools for Design, Analysis and Information Management Applied to Underground Drilling and Blasting
Fragblast, 2002
In underground mining, the often unpredictable variability in ground conditions may lead to the a... more In underground mining, the often unpredictable variability in ground conditions may lead to the application of suboptimal drilling and blasting patterns, resulting in poor performance. Experience and pertinent information to develop and implement improved drilling and blasting strategies can be easily lost due to the lack of means to help engineers store, access and manage this information. The Julius Kruttschnitt Mineral Research Centre (JKMRC) through a series of industry funded applied research projects has been developing a system that can facilitate the drill and blast design, analysis, auditing, documentation and data management processes. The system is a hybrid between an information management software module called BMS (Blast Management System) and two design and analysis modules, 2DRing for underground production blasting activities and 2DFace for development blasting activities. A concise description of the software tools and its applications are given in this paper. Opportunities to further develop the software are also highlighted, they include options to integrate these tools to existing drilling and blasting automation systems and portable computing technology to facilitate the design, implementation and continuous improvement processes.
A Fragmentation Modelling Framework for Underground Ring Blasting Applications
Fragblast, 2004
... a fines uniformity index and a characteristic size for the fines region is derived from the f... more ... a fines uniformity index and a characteristic size for the fines region is derived from the fines inflection point and the post blast mean fragment size x50. ... The analysis demonstrates the relative impact of rock mass characteristics on fragmentation (ie, degree of fracturing). ...
Blast Induced Damage and Dynamic Behaviour of Hangingwalls in Bench Stoping
Fragblast, 2004
... Table 1. The effect of the explosive type on measured vibrations. Burden (m) Explosive type K... more ... Table 1. The effect of the explosive type on measured vibrations. Burden (m) Explosive type K α No. ... The damage caused by any particular blasting event can be determined by comparing the pre-blast and post-blast wall conditions within the observation holes. ...
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Papers by Italo Onederra