mine bench height for blasting

  • bench height in iron ore mine

    the deep bench blasting technology in the important role of mining. 3 preliminary work to Nanshan mine has been mining since 1916 a 90-year history is China s largest iron ore . Chat Online height of iron ore mine bench in indiacrusherasia . height of iron ore mine bench in india.

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  • Big Bench Blasting In Mining Operations

    Dec 12 The drilling cost depends on bench configuration the performance of drilling equipment rock characteristics and blasting pattern. Typical mining bench is illustrated in Fig. 2. In a bench blasting activity the length width and height of the bench are known while designing a blast.

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  • Development and Application of Blast Casting Technique in

    Blast casting is a high-efficiency technique applied in surface mines for overburden removal and results in stripping cost savings. According to ballistic theory and center-of-mass frame basic movement principles key factors influencing blast casting effect were analyzed which include bench height and mining panel width inclined angle of blast holes explosive unit consumption (EUC) delay

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  • Improving Double Bench Face Performance at the Ekati

    involves drilling blasting and excavating the material for the design bench height. A second bench is then excavated without the creation of a catch bench i.e. only minimal offset from the first bench face is allowed when drilling off the second bench. The result is a double high bench face or double bench.

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  • DETERMINATION OF SOME BENCH BLAST

    blast area patch-1 Mine-2 22-23 4 Co-ordinates for the blastholes of patch-2 Mine-2 23-26 5 Boundary co-ordinates of top blast bench height bench slope angle height to width ratio etc. Explosive characteristics Characteristics of blasting accessories such

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  • BLASTECOrica Mining Services

    1.7 Limitation with respect to relation Hole Diameter/Bench Height In the program there is a limitation which does not allow too small bench heights in rela-tion to the hole diameter. Minimum accepted Bench Height (meter) is equal to Hole Di-ameter (mm) /100. For example mi-nimum bench height when using 76 mm drill holes is 0.76 m.

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  • Blaster s Training ModulesModule 4Blasthole Drilling

    Bench Height feet 3 3.5 4 4.5 5 5.5 6 6.25 6.5 6.75 7 7.88 9 9.88 10.6 12.3 13 15 16 3 7 10 13 16 20 23 26 30 33 36 39 43 46 49 52 56 59 62 66 69 72 75 79 82 Hole Diameter in Inches A common method for calculating this relationship is d (inches) < H/5 (in feet). Thus for example the maximum recommended drill-hole diameter for a mine that

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  • mining engineering MINE DESIGN BENCHING

    Jun 08 2010 · Bench Height and Dilution Watch Your Blasting Slope Design Summary Slope Design Conclusions 1. Maximize the height of the benches at the expense of mining selectivity 2. Minimize the width of working benches at the expense of productivity 3. Minimize the number width of catch benches

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  • Big Bench Blasting In Mining Operations

    Dec 12 The drilling cost depends on bench configuration the performance of drilling equipment rock characteristics and blasting pattern. Typical mining bench is illustrated in Fig. 2. In a bench blasting activity the length width and height of the bench are known while designing a blast.

    Get Price
  • Development and Application of Blast Casting Technique in

    Blast casting is a high-efficiency technique applied in surface mines for overburden removal and results in stripping cost savings. According to ballistic theory and center-of-mass frame basic movement principles key factors influencing blast casting effect were analyzed which include bench height and mining panel width inclined angle of blast holes explosive unit consumption (EUC) delay

    Get Price
  • Selection of practical bench height in open pit mining

    Dilution versus bench height (Bozorgebrahimi et al. 2005). Figure 3. Large block of the simple sequencing method. In open pit mining factors that can affect the degree of dilution can be regarded as deposit-related or mine-related. The bench height is a mine-related parameter that can be studied using a simple geometrical model of

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  • Blast fragmentation measurements in International Mining

    "Successful blasting to optimize the overall project economics is part of the study of mine to mill optimization. Mine-to-Mill® optimization as coined by JKTech considers the fragmentation and the impact of the particle size distribution on the drill blast and processing costs and process plant performance.

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  • A system-wide approach to minimize the operational cost of

    Dec 12 2018 · The drilling cost depends on bench configuration the performance of drilling equipment rock characteristics and blasting pattern. Typical mining bench is illustrated in Fig. 2. In a bench blasting activity the length width and height of the bench are known while designing a blast.

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  • CONSIDERATIONS IN THE OPTIMISATION OF BENCH

    The South African Institute of Mining and Metallurgy height bench face angle and berm width can be used in the slope design. The bench designs of blasting for wall stability are an additional criterion. The wedge failure mechanism and volume of failed material are illustrated in

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  • ON-BENCH PRACTICES FOR OPEN CUT MINES AND

    to on-bench activities including the preparation of a blast area the priming and charging of blastholes stemming and the tie-up of charged blastholes ready for firing. 1.2 This code does not cover the detailed requirements for the safe and secure storage

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  • big bench blasting in mining operations

    big bench blasting in mining operations. Some other researchers made attempts to optimize drilling and blasting operations from the technical point of view Sontamino and Drebenstedt addressed a dynamic model for a bench blasting design Bowa introduced a practical method in an open pit mine to optimize blasting design parameters such as bench height drill hole diameter spacing

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  • Blast fragmentation measurements in International Mining

    "Successful blasting to optimize the overall project economics is part of the study of mine to mill optimization. Mine-to-Mill® optimization as coined by JKTech considers the fragmentation and the impact of the particle size distribution on the drill blast and processing costs and process plant performance.

    Get Price
  • meaning of bench berm bench toe in mining « BINQ Mining

    Improving Double Bench Face Performance at the Ekati Diamond . impact on the final bench profile by contributing to blast damage of the face. BHP Billiton Diamonds Inc. Ekati Mine Diamond MineTM has pioneered the usage of . for this article the mean design bench face angle was around 80°.. not as effective as a catch fence nor as effective as a berm at the bench crest as falling

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  • (PDF) Rock Fragmentation by Blastinga review

    Bench height hole diameter spacing burden hole length bottom charge column charge stemming specific hole length and specific charge are the design parameters in bench production blasting.

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  • Economic evaluation of optimum bench height in quarries

    bench height has been found to be 15 m. At the same time the blast unit cost has been seen to diminish as the hole diameter grows. As the bench height goes up unit cost appears to drop however for 20 m of bench height because of the increase in priming the unit cost tends to build up increase. Loading and transportation

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  • International Journal of Science Technology Reference

    D=blast hole diameter (mm) W=standard deviation of the drilling accuracy (m) L=total charge length (m) H=Bench height (m).Cunningham (1987) notes that the uniformity coefficient n usually varies between 0.8 and 1.5 1.3 Bench Blasting Parameters Bench blasting in open pit operations are classified according to their purpose.

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  • CODE OF PRACTICE

    Mar 02 2018 · The bench height is designed by the mine planner. The main constraint on height of bench is Downer EDI Mining-Blasting Services Pty Ltd Dyno Nobel Asia Pacific Pty Limited Maxam Australia Pty Ltd Nitro Sibir Australia Pty Ltd Orica Australia Limited

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  • International Journal of Science Technology Reference

    D=blast hole diameter (mm) W=standard deviation of the drilling accuracy (m) L=total charge length (m) H=Bench height (m).Cunningham (1987) notes that the uniformity coefficient n usually varies between 0.8 and 1.5 1.3 Bench Blasting Parameters Bench blasting in open pit operations are classified according to their purpose.

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  • Basics of an open pit mineMine Engineer

    Several benches may be in operation simultaneously in different parts of and at different elevations in the open pit mine. Open pit mines can be used in coal mining and they are used extensively in "hard rock" mining for ores such as metal ores copper gold iron aluminum and many minerals.

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  • Reduction of Blast Induced Ground Mining and

    bench height of 7 m. A blast hole of 150 mm diameter was created at a distance of 4 m (burden) from the free face. These parameters are of those full-scale single hole blast conducted at an opencast coal mine in India (Adhikari et al. 2005). A set of vertical joints with a spacing of 20 m and horizontal joints with a spacing of 10 m was generated.

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  • big bench blasting in mining operations

    big bench blasting in mining operations. Some other researchers made attempts to optimize drilling and blasting operations from the technical point of view Sontamino and Drebenstedt addressed a dynamic model for a bench blasting design Bowa introduced a practical method in an open pit mine to optimize blasting design parameters such as bench height drill hole diameter spacing

    Get Price
  • Improved Blasting and Bench Slope Design at the Aitik

    For the footwall presplit blasting in inclined (70°) holes over the full double-bench height proved to be suitable in terms of both achievable bench slope geometry and production concerns. For the hangingwall a presplit blast design is used in specific areas to ensure that sufficient ramp width is achieved. The study

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  • Improved Blasting and Bench Slope Design at the Aitik

    For the footwall presplit blasting in inclined (70°) holes over the full double-bench height proved to be suitable in terms of both achievable bench slope geometry and production concerns. For the hangingwall a presplit blast design is used in specific areas to ensure that sufficient ramp width is achieved. The study

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  • mining engineering MINE DESIGN BENCHING

    Jun 08 2010 · Bench Height and Dilution Watch Your Blasting Slope Design Summary Slope Design Conclusions 1. Maximize the height of the benches at the expense of mining selectivity 2. Minimize the width of working benches at the expense of productivity 3. Minimize the number width of catch benches

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  • Prediction of Rock Size Distribution in Mine Bench

    Prediction of Rock Size Distribution in Mine Bench Blasting Using a Novel Ant Colony Optimization-Based Boosted Regression Tree Technique bench height stemming length and burden and outputs i.e. RSD in this study. The novel scoring and color-intensity methods were used for visualizing several statistical criteria including the

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  • Bench Height Drilling Mining Free 30-day Trial Scribd

    Mine Planning Bench Blasting. TGA March. 1-s2.0-Smain.pdf. ICRAMID_283. Tech Drilling DrDrilling1. and benches fragmentation usually cheaper with larger holes and benches Regulations may constrain Some localities limit bench height for safety Blast

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  • Basics of an open pit mineMine Engineer

    Several benches may be in operation simultaneously in different parts of and at different elevations in the open pit mine. Open pit mines can be used in coal mining and they are used extensively in "hard rock" mining for ores such as metal ores copper gold iron aluminum and many minerals.

    Get Price
  • Big Bench Blasting In Mining Operations

    Dec 12 The drilling cost depends on bench configuration the performance of drilling equipment rock characteristics and blasting pattern. Typical mining bench is illustrated in Fig. 2. In a bench blasting activity the length width and height of the bench are known while designing a blast.

    Get Price
  • ASK MINING Blasting Practices at Open Cast Mines

    Mar 02 2012 · Blast Hole Diameter Up to bench height of 8m 100mm 150mm 163mm of blast hole diameter is preferred but for bench height > 8m a minimum of 250mm diameter of blast hole is efficient. 4. Spacing and Burden In coal measure rocks spacing varies from 3-8m whereas burden is selected about 0.8 times the spacing.

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  • ON-BENCH PRACTICES FOR OPEN CUT MINES AND

    to on-bench activities including the preparation of a blast area the priming and charging of blastholes stemming and the tie-up of charged blastholes ready for firing. 1.2 This code does not cover the detailed requirements for the safe and secure storage

    Get Price
  • ASK MINING Blasting Practices at Open Cast Mines

    Mar 02 2012 · Blast Hole Diameter Up to bench height of 8m 100mm 150mm 163mm of blast hole diameter is preferred but for bench height > 8m a minimum of 250mm diameter of blast hole is efficient. 4. Spacing and Burden In coal measure rocks spacing varies from 3-8m whereas burden is selected about 0.8 times the spacing.

    Get Price
  • BULK EMULSION EXPLOSIVEA CASE STUDY

    3.2 Drilling and Blasting Generally Since the start up of the mine hole diameters of 9 7/8" have been used. 18 m vertical holes are drilled in the 15 m high bench 2 in a 7.5 x 9.5 m pattern for the stock blasts. An un­ loaded hole length of 4 m is left after the hole has been loaded. In 1969 Nitro Nobel built a

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