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  • Design of Drilling and Blasting Pattern for Excavation of

    Jan 01, 2010· Design of Drilling and Blasting Pattern for Excavation of HRT in High Temperature Zone (Adit 4 Upstream) at Karcham-Wangtoo Hydroelectric Project D. G. Kadkade Jaiprakash Associates Ltd Sector 128, Noida-201304, Chapter 8 BLAST DESIGN NPS,BLAST DESIGN (Figure 8-2) Staggered pattern (Figure 8-3) Sing (Figure 8-1) Square or rectangular pattern. 114 of explosive energy be placed into proper perspective within the entire drilling, blasting, handling and process-ing operation. This relationship is illustrated in

  • DRILLING AND BLASTING DESIGN BASED ON INVARIABLE

    DRILLING AND BLASTING DESIGN BASED ON INVARIABLE MINING PARAMETERS concern drilling pattern and specific charge. The main objectives of the research are: Fig. 1 Particle size distribution for Kuznechnoe granite deposit: 1, 2-drilling chips for two roller-bit drilling rigs (X-axis inPattern Design Hamiltons Blasting,Pattern Design Hamiltons Blasting objective is to provide effective drill and blast solutions to create sustainable value through customer focused, innovative solution, and continuous improvement. Hamiltons Blasting recognises blast design is vital to ensuring cost-efficient operations and output.

  • CV1240-Rock Excavations Blasting Design Part 1

    Drilling pat­ terns are always defined as this spacing and the burden and spacing (e.g., for a 5 x 6 pattern, the blast design has a burden of 5 ft and a spacing between boreholes of 6 ft). Rock Excavations Blasting Design Part 1 Ezekiel Enterprises, LLCDevelopment Blasting Mining and Blasting,Drift or Tunnel Blasting Divided Drift or Tunnel face into Design Sections Blast Pattern Design Four section cut. Large diameter center hole Blast Pattern Design 5-hole Burn-Cut Various Burn-Cuts V-Cut Firing Sequence Firing sequence for a large tunnel round Smooth wall Blasting

  • TUNNELS, SHAFT AND DEVELOPMENT HEADINGS

    When high heading advance-rates are desired, drilling and blasting cycles are most productive when round length is maximized. The practical length of heading rounds is limited by the type of cut used and its effectiveness. If V cuts or swing cuts are used, the advance is limited by physical width of the heading and the angle of the cut.Design methodology for underground ring blasting,Smaller diameter holes (64 or 76 mm) are generally restricted to activities such as drawbell blasting where the design objective is to minimise damage to pillars. Design burden For the common hole diameters used in ring blasting, design burdens typically range from 1 ?8to3?5 m and rarely 4 ?0 m.

  • blast pattern Mining and Blasting

    Oct 12, 2012· In these cases, the firing pattern can be used to control the blast direction in a more favourable direction and improve the blasting result. Before drilling, the blast direction should be set according to the orientation of the Elements of drill-and-blast design and three-dimensional,The proper design of the drilling and blasting system is essential to the success of mine operations. systems and a three-dimensional drill-and

  • Drilling & Blasting Pattern Nature

    Blasting Safety with Proper Techniques. ENVIRONMENTAL ISSUES Blast holes can be drilled in either To overcome these hazards, Ground Vibration, Air Blast, Fly Rock, square pattern or staggered Premature Detonations and Misfires proper blasting pattern to be pattern. IMPORTANT designed and followed as A staggered pattern produces a free faces given in Blast Design Software Blasting Pattern Software Blast,Blast Design. Generates blast plan and according to the delay pattern structure, simulation. BLAst DESigner Software (BLADES) calculates blast plan parameters, explosives charge distribution, initiation timing and sequence, results in terms of

  • CV1240-Rock Excavations Blasting Design Part 1

    Drilling pat­ terns are always defined as this spacing and the burden and spacing (e.g., for a 5 x 6 pattern, the blast design has a burden of 5 ft and a spacing between boreholes of 6 ft). Rock Excavations Blasting Design Part 1 Ezekiel Enterprises, LLC 6 Relief is the presence of a free face in the rock mass such that the blasted rockBlasting Patterns Scribd,Blasting Patterns Free download as Powerpoint Presentation (.ppt), PDF File (.pdf), Text File (.txt) or view presentation slides online. drilling and blasting pattern

  • 7 Rules of Thumb for Open Bit Blast Pattern

    Apr 08, 2018· 7 Rules of Thumb for Open Bit Blast Pattern April 8, 2018 Drilling and blasting are all about putting the right amount of energy in the right place at the right time at minimum cost to achieve maximum control over the shot rock volume and the resulting particle size distribution in the muck pileDrill and Blast Digitization Benefits V1.3.pdf,Also, Simulation and Analysis of complete blast design based on patterns and delays used. Business Benefits : Blast Design: Provides design of blasting pattern and allows easy design of blast by calculating blast parameters, vibration values, fragment size and approximate danger zone. Cost analysis: Provides Drilling and Blasting cost analysis

  • Optimized design of drilling and blasting operations in

    Nov 01, 2018· 1. Introduction. Mining activity is mostly represented by these four main operations: drilling, blasting, loading and hauling. For a proper mine planning and design, all of these operations need to be carefully planned in such a manner that can prevent extra loads such as operating costs, environmental footprints, etc. Amongst these operations, drilling and New burn cut blast design in drives enhances drilling,Aug 14, 2015· Appropriate blast design including drilling pattern, quantity and type of explosive, initiation sequence 3. Types of drilling equipment used and length of drilling rod used 4. Dimension of Drives 5.

  • TUNNELS, SHAFT AND DEVELOPMENT HEADINGS BLAST

    affecting blast design. Round dimensions are usually pre-set, and designers must often accept the limitations that come with using existing drilling equipment drilling equipment. Despite some limitations, many other design elements can be adjusted to improve round design. Drill patterns and explosive loads can be modified, and within drillingDrilling and Blasting in Underground Mining GRT Review,Apr 01, 2021· The drilling pattern chosen should suit the intended blasting operations to achieve minimal overburden at the primary blasting level. The need for secondary blasting to remove overburden should be minimal if the drilling patterns are set up properly.

  • Design methodology for underground ring blasting

    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. The design engineer needs to have a thorough appreciation of the capabilities and limitations of each one of these enabling technologies.Calculation Of Drilling And Blasting Parameters For Quarry,Chapter 8 BLAST DESIGN NPS 1. Calculation sheet-drill pattern dimensions for average and alterna-tive blasting conditions.. 9 2. Blasting pattern dimensions for Ohio, Adams County, Quarry No. 1 11 3. Blasting pattern dimensions for Ohio, Highland County, Electronic Submission System (ESS)

  • Elements of drill-and-blast design and three-dimensional

    The proper design of the drilling and blasting system is essential to the success of mine operations. systems and a three-dimensional drill-and Drilling & Blasting Pattern Nature,Blasting Safety with Proper Techniques. ENVIRONMENTAL ISSUES Blast holes can be drilled in either To overcome these hazards, Ground Vibration, Air Blast, Fly Rock, square pattern or staggered Premature Detonations and Misfires proper blasting pattern to be pattern. IMPORTANT designed and followed as A staggered pattern produces a free faces given in

  • Best practices: Drilling and blasting Pit & Quarry

    Dec 07, 2015· Blasting contractors should lay out the drill pattern based on a surveyed profile of the face. At a minimum, a profile survey should be done after drilling and before loading so that the proper explosive load can be determined for each blast hole based on the survey and drill log. A best practice would be to profile both before and after drilling.Optimization of Blasting Operation in Opencast Mine,i.e., improper design of blast pattern, poor implementation of blast design in field work and poor use of explosives. So, these operations are eliminated with making of better blast design from old ones means optimize the blast designs for better results and improve productivity. 2. DRILLING AND BLASTING 2.1 Drilling

  • Optimization of blasting design parameters on open IJSTR

    b) Line drilling and blasting involves the drilling of closely spaced holes along the limit of the excavation. This provides a plane of weakness to which a primary blast may break. Cushion Blasting (Trim Blasting) is similar to smooth blasting in that the holes are shot after the main production shot.OPTIMIZATION OF DRILLING AND BLASTING PRACTICES ,Drilling and blasting are seen as sub-systems of the size reducing operations in mining. To have better design parameters for economical excavation of mineral production and good fragmentation, the drilling and blasting operations needs to be optimized to improve

  • Blast Design Software Blasting Pattern Software Blast

    Based on desired blasting inputs such as face co-ordinates, hole diameter, pattern layout, face rock characteristics and location, face profile, hole diameter, pattern layout, desired fragmentation size, explosives and initiating devices, environmental constraints, BLAST DESIGNER SOFTWARE (BLADES) calculates blast plan parameters, explosives charge distribution, Operational Design Tips for the Drill and Blast Engineer,Feb 21, 2019· Keep the drills drilling! The drill department’s job is to manage blast-able inventory in front of the blast crew. If drilling is a bottleneck, going off path or getting into a cycle of “sprinting” benches will not achieve production goals. Remember: If a drill is walking or floating to a new pattern or re-drill, it’s not drilling.

  • Drill and Blast Digitization Benefits V1.3.pdf

    Also, Simulation and Analysis of complete blast design based on patterns and delays used. Business Benefits : Blast Design: Provides design of blasting pattern and allows easy design of blast by calculating blast parameters, vibration values, fragment size and approximate danger zone. Cost analysis: Provides Drilling and Blasting cost analysisSolved = Design the blast pattern for a mine drift in hard,Question: = Design the blast pattern for a mine drift in hard rock (c = 0.4), excavated by the drilling and blasting (D&B) method with parallel blastholes and a four-section burn cut. The geometric dimensions and drilling data are.

  • Drilling & Blasting arşivleri Mining Consultant

    Drilling & Blasting By Furkan Kasa 7 October 2016 3 Comments Open Pit Blasting Pattern Design Here is a new style of form that has calculation of Open Pit Blasting Pattern Design. With this form you can register your email and then calculated fields will be sent to you via e-mail with pdf format.Metals Free Full-Text Numerical Modelling of Blasting,Mar 23, 2022· In order to reduce the blasting dust concentration in the tunnel during the drilling and blasting, accelerate the tunnel excavation process, and improve the working environment for the construction workers, a three-dimensional geometric model of dust transport was established based on the gas-solid two-phase flow model using the DesginModeler software, and the

  • PROCEDURES FOR BLASTING New York State Department

    Blast Pattern The plan view of the drill holes as laid out for blasting. Blast Plan A written procedure that details the methods and manner by which a Project blaster will comply with pertinent laws, rules, regulations, and contract documents.Blasting Techniques Used in Underground and Opencast Mines,3. Blast geometry in terms of hole diameter, bench height, burden, spacing, charge, stemming, delay pattern, etc. Given these inputs, SABREX predicts fragment size analysis, throw, muck pile profile, damage envelope, fly rock and cost of drilling blasting. The results are displayed in colour graphics and tabulations.