Drilling And Blasting Of Rocks Jimeno Pdf

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Drilling and blasting of rocks

This work has been totally financed by the Geornining Technological Institute of Spain under contract with the E. Cornpany Estudios y Proyectos Mineros, S. Authorization to photocopy iterns for internal or personal use, or the internal or personal use of specific clients, is granted by A. For those organizations that have been granted a photocopy license by CCC, a separate systern of payrnent has been arranged.

Balkerna, PO. Drilling parameters 4. V11 Characteristics of the joint systems V During the past two decades, there have been numerous technical contributions which have brought a better understanding of rock fragmentation with explosives, an improvement in drilling equipment and a noticeable evolution in the development of new explosives and blasting accessones.

The Geomining Technological Institute of Spain ITGE , aware of this Progress and of the importance which the breakage process has acquired in mining and civil engineering projects, has considered the publication of a 'Rock Drilling and Blasting Handbook' of great interest.

This handbook was conceived with integration in mind, as the Systems and machines of drilling, the types and characteristics of explosives and the methods for calculating the blasts are treated together, without ever forgetting that these breakage operations form part of a.

At the Same time, the objectives and contents of this handbook contribute to improved safety in mining. There are very few similar works in other languages, and certainly none other in Spanish. We sincerely hope that this handbook, which brings together practical and theoretical aspects, will be of use to all engineers who work with drilling and blasting as a rock breakage method. Rock breakage with explosives has existed since the XVII century when black powder came into use in mining, rapidly becoming one of the most popular methods.

The important historical events which have marked an era were the invention of dynamite by Alfred Nobel in , the use of ANFO starting in , the development of slumes from the late fifties on and, lastly, the preparation of blasting agents such as emulsions, heavy ANFO, etc.

At the Same time, blasthole drilling progressed with such decisive events as the the use of compressed air as the source of energy in rotary percussive rigs in , the use of large rotary drills and of down-the-hole hammers in the fifties and the development of hydraulic hammers in the late seventies. However, rock blasting was always considered, until recently, as an art bom from the skill and experience of the blasters.

Now it has become a technique based on scientific principles derived from knowledge of the action of explosives, the mechanisms of breakage and the geomechanic properties of the rock masses. The purpose of this handbook is to give basic knowledge of the drilling Systems, the types of available explosives and accessaries and the Parameters that intervene in blast designing, whether controllable or not.

The handbook is primarily meant for students of the Technical Schools, to be useq as a textbook, and for all professionals who are involved with explosives in mining operations and civil engineenng projects. Carlos and Emilio Lopez Jimeno. Company Estudios y Proyectos Mineros, S. The authors wish to express their most sincere gratitude to the following experts, companies and official organisms for their collaboration and release of technical material as well as permission to reproduce certain data and figures.

Knotts Amos L. Dolby Co. Petrunyak App1ex:S. Olofsson Atlas Copco S. Sterner, L. Miller Atlas Powder International: J. Bauer T Bill Lane Inc. Ludwiczak Bucyrys Erie Co. Rekoske Bendesanstalt fr Geowissenschaften und Rohstdffe: R.

Ldeling Canmet: G. Larocque Ci1 Inc. Chung, B. Mohanty, K. Joyce, PR. Day, W. Webster, D. Dayphinais, I. Sharpe Cominco Ltd. Reipas David, S. Davenport Dupont Canada: D. Tansey E. Porter, B. Glenn, J. Andrews Entrecanales y Tavora, S. Ucar Golder Associates: T. Hagan, E. Castells Hydro-Quebec: F Lacomte! Iberduero, S. Harries, J. Paine Ilmeg: S. Mathews Kaiser Engineers, Inc. Medearis Kometa Oy: R. Ikola Kontinitro A. Lang Lewis L. Oriard, Inc. Hermansson Martin Marietta Laboratories: D. Winzer McGill University: R.

E Favreau, R. MacLachlan, W. Leighton Michigan Technological University: F. Konon Nitro Consult, A. Larsson, PA. Persson, M. Cobeiia Precision Blasting Services: C. Konya Queen's University: P N. Calder Reed Mining Tools, Inc. Suiirez Richard L. Ash Rietspruit Mining Co. Macdonald Societa Esplosivi Industriali S. Berta Strornrne: A. Heltzen Thermex Energy Corporation: R. Paddock T Peal, S. Arnaiz Union Espaiiola de Explosivos: R.

Worsey, R. Smith U. Bureau of Mines Twin Cities. Research Center: L. Fletcher At the Same time we would also like to acknowledge the drawings and photography done by Jose Maria de Salas and the corrections made by Carlos Ramiro Visser.

The systems of rock drilling that have been developed and classified according to their order of present day applicability are: - Mechanical: Percussion, rotary, rotary-percussion. Even though there is an enormous variety of possible rock drilling systems, in mining and civil engineering drilling is presently canied out, almost exclusively, by mechanical energy. Therefore, in this handbook only the mechanical means will be discussed, reviewing the fundalmentals, tools and equipment for each of them.

The main components of a drilling system of this type are: the drilling rig which is the source of mechanical energy, the drill steel which is,the means of transmitting that energy, the bit which is the tool that exercises that energy upon the rock, and the flushing air that cleans out and evacuates the drilling cuttings and waste produced. This is canied out with light equipment that is hand held by the drillers.

It is used in small operations where, due to the size, other machinery cannot be used or its cost is not justified. The drilling equipment is mounted upon rigs with which the Operator can control all drilling Parameters from a comfortable position. These structures or chasis can themselves be mounted on wheels or tracks and either be self-propelled or towable. On the other hand, the types of work, in surface as well.

This is the best method for rock blasting as a free face is available for the projection of material and it allows work tobe systemized. It is used in surface projects as well as in underground operations, usually with vertical blastholes, although horizontal holes can be drilled on occasion.

An initial cavity or cut must be opened towards which the rest of the fragmented rock from the other charges is directed. Blasthole drilling can be carried out with hand held drills, but the trend is towards total mechanization, using jumbos with one or various booms. This term is used in rnining operations, fundamentally underground, to describe the labors of ore extraction.

The equipment and methods used v a q with the exploitation systems, having the common factor of little available space in the drifts for blasthole drilling. In many underground and civil engineering projects it is necessary to Open raises.

Drilling and Blasting of Rocks

Drilling and blasting is the controlled use of explosives and other methods such as gas pressure blasting pyrotechnics, to break rock for excavation. It is practiced most often in mining, quarrying and civil engineering such as dam, tunnel or road construction. The result of rock blasting is often known as a rock cut. Drilling and blasting currently utilizes many different varieties of explosives with different compositions and performance properties. Higher velocity explosives are used fo….

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This work has been totally financed by the Geornining Technological Institute of Spain under contract with the E. Cornpany Estudios y Proyectos Mineros, S. Authorization to photocopy iterns for internal or personal use, or the internal or personal use of specific clients, is granted by A. For those organizations that have been granted a photocopy license by CCC, a separate systern of payrnent has been arranged. Balkerna, PO. Drilling parameters 4. V11


The pre-splitting is one of the techniques for contour blasting that have been developed from the fifties and until now is one of the most useful in a series of cases, as in the blast vibrations attenuation and in cut a line to define and isolated a region to be broken. This consists in creating a joint or a fracture plane in the rock mass before firing the production blasting by means of a row of blastholes, usually of small diameter, and with decoupled explosive charges. The firing of the pre-splitting holes can be done simultaneously, to create a well defined line, but should be from 90 to ms in advance to the stope holes detonation. Thus, how to apply and when, it is not a secret in nowadays, but all the procedures have a very high level of experimental knowledge. The authors of this paper, based in the crater theory presented by W.

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This work explores rock fragmentation through drilling and explosives. Sections cover various characteristics, methods and types of equipment, including rotary percussive drilling, compressors, industrial explosives, blasting accessories, rock breakage, blasting for tunnels and drifts, underwater blasting, secondary fragmentation and special blasting, and structure and building demolition. Toggle navigation Menu. Availability: Find a library where document is available.

This work discusses the systems and machines of drilling, the types and characteristics of explosives and the methods for calculating blasts. Its objectives and contents contribute to improved safety in mining. Read more Please choose whether or not you want other users to be able to see on your profile that this library is a favorite of yours. Finding libraries that hold this item You may have already requested this item. Please select Ok if you would like to proceed with this request anyway.

Rock breakage with explosives has existed since the seventeenth century when black powder came into use in mining. Since then it has progressed from the in.

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