Publications international blasting consultants blast. The tunnel route will run below the alps with a maximum cover of 1,600 m. There have been significant efficiency gains and cost savings on site. The tunneling industry is abuzz about the upcoming brenner base tunnel project. Whether supplied as an independent service or integrated in a global blasting service, drilling and blasting is a fundamental link in the production chain. Blasting for underwater rock excavation explosives engineering handbook roberts, r. Lecture 4 drifting, drilling, blasting and scaling. In the case of a tunnel blast, the first requirement is to create a void into which rock broken by the blast can expand. Drill and blast tunneling practices ctt consulting. Iblast 7 software provides a professional editing document system. Optimised drill and blast operations result in good fragmentation and excellent heave needed f or easy digging of muckpiles, loading, conveying and ore processing operations. The size of the mast and drill steels carried by the rig are important considerations in drilling efficiency. Drill and blast is one of the first processes to happen in an operation and can determine the effectiveness of subsequent activities, ensure it is done right by utilising the drill and blast module to store, compare and report design versus actual, qaqc and blast consumables. Share what you know and love through presentations, infographics, documents and more.
Rapid plotting from preconfigured layouts, direct export to drill rig guidance. Drilling and blasting powerpoint 2003 linkedin slideshare. Construct hole templates with design parameters such as fixed or variable collar or toe spacing, angle changes and variable toe horizons. Initial rock support consists of 9footlong swellex friction bolts and shotcrete in most areas, with 15footlong swellex bolts being used in the soilrock interface and turn under areas.
Blast design essential tool kit in terms of ring design, the key design tools that also in uence the choice of the design parameters are drilling equipment, range of explosive types and initiation systems. Blastmap tm iii is a software tool for designing blast timing for use with axxis tm. Examples of work conducted throughout the world including the indian subcontinent, australia, and sweden amongst others are discussed. Ugdb ensures that communicating the plan is just as easy. Books international society of explosives engineers.
Drilling and blasting is the controlled use of explosives and other methods such as gas pressure blasting pyrotechnics, to break rock for excavation. Safety management systems were developed in consultation with mac drill and blast, as a governing tool. Improvement plan identify new or modified procedures to ensure blast design parameters are implemented. Bcm are the worlds largest user of the atlas copco coprod system on their fleet of drill and blast rigs.
Moreover when safety could be affected by a misreading information, iblast software offers a seamless way to produce clear professional blast design and simulation report. It is practiced most often in mining, quarrying and civil engineering such as dam, tunnel or road construction. Buffer hole radial damage is defined by a practical damage limit applied to the rock lying between the buffer holes and the perimeter. Drilling and blasting an overview sciencedirect topics. Since the introduction of the uni tronic system the.
Training courses advanced mining production systems. This paper discusses the actual use of this program for blast designs. Plan a blasting development program to meet stakeholder objectives. Tunnelling in rock by drilling and blasting presents the latest developments in the excavation of tunnels using the drilling and blasting method.
Underground drilling and blasting training dvd acg youtube. Blast hole drilling refers to the activity of drilling holes of a predetermined depth in a particular spot within a particular pattern with the objective of allowing explosive charges to. Unique single reference supports functional and costefficient designs of blast resistant buildings now theres a single reference to which architects, designers, and engineers can turn for guidance on all the key elements of the design of blast resistant buildings that satisfy the new asce standard for blast protection of buildings as well as other asce, aci, and aisc codes. If a quarry plans to use 30foot bench heights with 7 feet of sub drill, a drill rig. The new blast design concept applies the understanding of radial damage that is caused by the buffer hole column charge. Primary tunneling equipment included a drill jumbo and tunnel muckers. The blast evaluation study by orica mining services gave practical values and guidelines to the consortium on what levels of vibration to expect from tunnel blasting in the brisbane city region. Drilled with a jackleg and a design template, identical replications of the cut were tested.
Drill and blast tunneling practices gerhard girmscheid1 and cliff schexnayder, f. Define blast pattern with primers, explosives and timing sequences to produce detailed blast designs and solids. Rotary drilling and blasting in large surface mines. When underground blasting operations are close to occupied or otherwise. Blasting for underwater rock excavation explosives. The system is a valuable tool for the initial blast design calculations carried out for feasibility studies for the development of new ore bodies, or proposed modifications to existing blast designs. Our fleet of drill rigs allows us to drill holes from 64270mm holes. Thus, for a blaster, valuable tool is the file of blast reports that he builds as he gains experience. Pdf automation of drill and blast design researchgate. Not only do these provide evidence of the quality of his work, but they also. Results of blast monitoring will typicall y be available before the next blast, usually immediately following a blast.
Doing the right impression the first time is key for business. Blast analysis analyse the blast to confirm function using an array of blaster friendly tools create holebyhole charge sheets. Enclosed is a sample of a typical blast report attachment 2. Exel drilling provides a comprehensive range of drilling and blasting services, from consultancy and drilling only to full rockonground delivery. The design engineer needs to have a thorough appreciation of the capabilities and limitations of each one of these enabling technologies.
Drill and blast method has been widely used as an effective excavation method for underground rock caverns or tunnels. Electronic timing module design electronic timing for the most complex blast geometries using simple graphical objects. Clearing the toe, and therefore contributing to a smoother floor, is a major asset to improve blast design. A case study examination of two blast rounds at a nevada. The available techniques for drill and blast design in underground mining. Diamond drills blast hole drills rotary drill consisting of steel pipe drill stem on bottom of which is roller bit that disintegrates the rock as it rotates over it. Highperformance drill and blast methods for tunnel construction require that each of the individual working elements that constitute the construction process are optimized and considered as a system of sequential and parallel activities. Pdf drilling and blasting as a tunnel excavation method. It is also advised in the book, to reverse prime the first hole of. We operate top hammer, down hole hammer and rotary drill rigs, offering a wide scope of drilling capabilities for holes from 89 mm to 270 mm in diameter. Drill and blast drilling and blasting miplan solutions. Underground stope drill and blast designs optimisation program, in proceedings 11th international symposium on rock fragmentation by blasting, pp 7148 the australasian institute of mining and metallurgy. Generating a drill and blast plan is only half the job and deswik.
Procdings of the twentieth intcrnlional symposium on the application of computers and malhematies in the mineral industries. The result of rock blasting is often known as a rock cut drilling and blasting currently utilizes many different varieties of. Mac drill and blast is a family business developed with the support of industry professionals. Drill and blast method is mostly used method for the excavation throughout the world. Drilling and blasting integrated onsite drilling and blasting services for about 25 years, epc groupes have proven their ability to take up the challenges of a profession in which performance is key to success. An assessment of rock material was carried out in this study to determine the wear resistances of drill bit due to physical properties of granite and old alluvium.
Compared with bored tunneling by tunnel boring machine, blasting generally results in higher. At frontierkemper we are skilled at conventional drillandblast excavation as well as the shotcrete method also known as the sequential excavation method or new austrian tunneling method highway tunnels are often large in crosssection and require conventional drillandblast excavation methods. A case study examination of two blast rounds at a nevada gold mine. To achieve a good blast design, an understanding on the rock dynamic response. The traditional drill and blast method remains the least expensive and most practical means of advancing. Pdf rock blasting in underground mining researchgate. Blasters training modules module 4 blasthole drilling. With the blasterincharge as the focus, the 18th edition blasters handbook third printing is divided into four parts emphasizing safety, security and. The role will provide technical support including the planning, design, scheduling, extraction sequencing, modelling, analysis, process improvement, reconciliation and reporting. Exel drilling understands that good blast design is vital to ensuring costefficient operations and output. This enabled drilling and blasting techniques to be fully evaluated against excavation by. The distance between the back row blastholes and the line of drill holes is between 50 and 75% of the normal burden distance. Premier drill and blast has built its reputation over the past 35 years by delivering highly efficient drilling and blasting services to the mining, quarrying and civil construction industries. Complete blast planning, design and analysis software.
Grade control the grade control process is highly dependent on accurate sample and data collection and. Reducing the cost of drill and blast through blast design. The correct design of a blast starts with the first hole to be detonated. Where drilling and blasting conditions are both severe, the operator should use premium explosives, at least in the bottom one third of the drill hole. We operate within ohs, quality and maintenance management systems, ensuring our works and services meet superior standards and strict compliance conditions. The result the uni tronic system has delivered a technical solution to mining issues encountered at northparkes mine. This tunneling method involves the use of explosives. In underground blasting, the pull of the initial cut is the limiting factor for the. Surveying and setup drilling charging blasting ventilation scaling mucking. Mining engineer, petroleum engineer, planning engineer and more on. The effects of these several parameters on blast design, the results of blasting and especially. The method can be used in all types of rocks and the initial cost is lower than the mechanical method like tbm. The term blast hole drilling may sound selfexplanatory to some but a working definition is still in order.
The quality of open cut blasting often called cut blasting in tunneling in either tunneling or underground mining greatly. Check the design powder factors for standard blasts and presplits. Lateral development includes the inclined headings ramps and declines between levels. The blasters handbook 18th edition, third printing this third printing improves upon the more than 1,000 pages of explosives knowledge with updated content, equations and formulas. Blasting for underwater rock excavation explosives engineering handbook. For underground hard rock mines, the term lateral development means the horizontal headings in a mine,such as drifts and crosscuts on a mine level. Basic drilling cycle for drill and blast drifting and tunneling.
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