blasting pattern in opencast mining

  • blast pattern Mining and Blasting

    Oct 12, 2012· 2. Contemplation of Blast Design: Blast designing is not a science, but knowledge, experience, studying and analyzing past practices in relation to rock strata & geology etc., makes blaster to achieve perfection. Thus, for a blaster, valuable tool is the file of blast reports that he builds as he gains experience. Not only do these provide evidence of the quality of his work, but they alsoOptimization of Blasting Parameters in opencast Mines,Drilling and blasting are the major unit operations in opencast mining. Inspite of the best efforts to introduce mechanization in the opencast mines, blasting continue to dominate the production. Therefore to cut down the cost of production optimal fragmentation from properly designed blasting pattern

  • Chapter 8 BLAST DESIGN NPS

    The economic analysis of the use of explosives is an important part of blasting operations in mining and construction. Explosives are energy, and the efficient use of this energy is a major factor in keeping rock blasting costs under control. High-energy explosives enhance fragmentation, which ultimately produces a positive effect on productionOptimization of Blasting Operation in Opencast Mine,In opencast mining both vertical and inclined holes practiced with the bench face. The holes drilled in a row may be single or multiple. So those two patterns are used, mainly in the opencast mines. They are: a) Single row blasting pattern b) Multi row blasting pattern Single row blasting pattern:

  • Blast design in opencast mining SlideShare

    Oct 12, 2017· 1. BLAST DESIGN IN OPENCAST MINES Presented by Gopal Karmakar (Id- 511214015 ) and Jagat kumar (Id- 511214014) Mining Engineering IIEST Shibpur. 2. Outline • Introduction • Drilling • Explosive used in opencast mine • Types of variables in blast design • Blasting patterns used in Indian opencast mines • Concept of optimum blasting(PDF) ROCK BLASTING FOR MINING ResearchGate,For surface explorations, in opencast mining opera tions, [Show full abstract] exported from the model so that pattern and blast design can be undertaken in other software packages.

  • [PDF] Optimization of blasting parameters in opencast

    Drilling and blasting are the major unit operations in opencast mining. Inspite of the best efforts to introduce mechanization in the opencast mines, blasting continue to dominate the production. Therefore to cut down the cost of production optimal fragmentation from properly designed blasting pattern has to be achieved. Proper adoption of drilling and blasting can contribute significantlyOptimization of Blasting Operation in Opencast Mine,In opencast mining both vertical and inclined holes practiced with the bench face. The holes drilled in a row may be single or multiple. So those two patterns are used, mainly in the opencast mines. They are: a) Single row blasting pattern b) Multi row blasting pattern Single row blasting pattern:

  • Optimization of Blasting Parameters in opencast Mines

    Drilling and blasting are the major unit operations in opencast mining. Inspite of the best efforts to introduce mechanization in the opencast mines, blasting continue to dominate the production. Therefore to cut down the cost of production optimal fragmentation from properly designed blasting pattern IRJET- Optimization of Blasting Operation in Opencast Mine,The present operation is a step in the direction of developing a suitable Key Words: Optimization, Drilling, Blasting, Opencast blast model, with simple methodologies which can be mine, Blast model, Explosives, Machinery. adapted by the mining industry to achieve better blasting results. 1.

  • drilling patterns in opencast mines

    A new mining method 02 T, Conventional drill and blast practices are used in both, This equates to lost drilling expenditure on each newly drilled blast pattern. Read more Rock fragmentation control in opencast blastingDesigning Blast Patterns Using Empirical Formulas,Designing Blast Patterns Using Empirical Formulas A Comparison of Calculated Patterns With Plans Used in Quarrying Limestone and Dolomite, With Geologic Considerations By Joseph M. Pugliese Twin Cities Mining Research Center, Minneapolis, Minn . . US Department of Interior Office of Surface Mining Reclamation and Enforcement Kenneth K

  • Investigation Of Firing Patterns On Fragmentation In An

    The firing patterns used were: ‘skewed V’, ‘in line’, ‘diagonal’ and ‘extended V’. Results for blast designs using a 150mm blasthole diameter. The field observations and the results of the four blasts, all conducted on the same limestone bench, are tabulated in table 2. The drilling and firing patterns Drilling patterns QueensMineDesignWiki,Blast patterns with square patterns are simple and provide good results where spacing equals the burden. Although, in hard rock mining triangular formations where the burden is 1.15 times greater than the spacing are more effective as it induces further twisting and shearing of the rock and avoids splitting between blast holes on planes before

  • ON-BENCH PRACTICES FOR OPEN CUT MINES AND QUARRIES

    including blast notification,setting of blast gua rds, clearance of the blast exclusion zone, firing the shot, post-blast clearance ,or misfire management. These are described in the AEISG Code of Good Practice, “Blast Guarding in an Open Cut Mining Environment”.Blast Hole Drilling: The Basic Process RPM Drilling,Aug 24, 2017· Blast hole Drilling is a technique used in mining whereby a hole is drilled into the surface of the rock, packed with explosive material, and detonated. The aim of this technique is to induce cracks in the inner geology of the surrounding rock, in order to facilitate further drilling and associated mining

  • Blast Design Software Blasting Pattern Software Blast

    Blast Design. Generates blast plan and according to the delay pattern structure, simulation. BLA st DES igner Software (BLADES) calculates blast plan parameters, explosives charge distribution, initiation timing and sequence, results in terms of rock breakage and fragment size distribution.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 blasting are known as the

  • Drilling pattern in underground mining wedge cut

    In this video explain the wedge cut pattern which is used in solid blasting. Important questions for mining compition exam https://youtu.be/nfm7rutwzbo*Seco.A system-wide approach to minimize the operational cost of,Dec 12, 2018· The production cycle of open-cast coal mines generally includes drilling, blasting, loading, hauling and coal preparation activities. Individual optimization of these activities does not mean that the whole system is optimized. This paper proposes a cost model considering all activities in mining cycle and system-wide approach to minimize the total mining cost of bench production. Since the

  • Rock blasting for mining SlideShare

    Jul 28, 2017· 29 Selection of explosives, drilling pattern, blasting pattern and delay patterns are the major aspects in mining. 30. 30 2.1 Drilling and Blasting: There are two basic operations that are necessary to achieve success in mining.Optimization of Blasting Operation in Opencast Mine,In opencast mining both vertical and inclined holes practiced with the bench face. The holes drilled in a row may be single or multiple. So those two patterns are used, mainly in the opencast mines. They are: a) Single row blasting pattern b) Multi row blasting pattern Single row blasting pattern:

  • IRJET- Optimization of Blasting Operation in Opencast Mine

    The present operation is a step in the direction of developing a suitable Key Words: Optimization, Drilling, Blasting, Opencast blast model, with simple methodologies which can be mine, Blast model, Explosives, Machinery. adapted by the mining industry to achieve better blasting results. 1.Blasting Pattern In Opencast Mining,blasting pattern in opencast mining rock crusher india. better fragmentation in opencast iron ore. blasting pattern in opencast iron mines Quarrying Crusher Plant. Read more. blasting in open cast

  • ASK MINING: Blasting Practices at Open Cast Mines

    Mar 02, 2012· Following are some important facts related to blasting practices in open cast mines:-. 1. Drilling: There are two major types of drilling techniques being used. Down the Hole (DTH): It is used when the blast hole diameter varies from 100mm to 380mm and the depth of blast hole is 12-15m. Rotary: When the blast hole diameter > 400mm and the depthOpen Cast Coal Mining Blasting Pattern- SOF Mining machine,Blasting pattern in opencast mining blasting pattern in opencast mining himalayahouse explosive casting is the technique used by many surface coal mines to control the displacement of overburden by means of explosive energy the casting moves of the overburden into the minedout pit while the remaining spoil is removed. Get Details

  • drilling patterns in opencast mines

    A new mining method 02 T, Conventional drill and blast practices are used in both, This equates to lost drilling expenditure on each newly drilled blast pattern. Read more Rock fragmentation control in opencast blastingOptimized 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 blasting are known as the

  • Investigation Of Firing Patterns On Fragmentation In An

    The firing patterns used were: ‘skewed V’, ‘in line’, ‘diagonal’ and ‘extended V’. Results for blast designs using a 150mm blasthole diameter. The field observations and the results of the four blasts, all conducted on the same limestone bench, are tabulated in table 2. The drilling and firing patterns DESIGN OF SURFACE BLASTS- A COMPUTATIONAL ,the surface mines, blast patterns are established through trial blasts. The blast pattern proposed from trial blast often fails to achieve the required blast results. Thus, it is felt necessary to develop a software for surface blast design based on the methodology proposed by

  • Blast-Casting Mechanism and Parameter Optimization of a

    During the research on bench deep-hole blast casting, the blast-casting parameters are directly related to the blast-casting results, so it could reveal the mechanism for improving the effect thereof. Based on the principle of the plane charge method, both the stress wave and detonation gas were considered to affect rock fragmentation and casting, a model of overburden fragmentation andA system-wide approach to minimize the operational cost of,Dec 12, 2018· The production cycle of open-cast coal mines generally includes drilling, blasting, loading, hauling and coal preparation activities. Individual optimization of these activities does not mean that the whole system is optimized. This paper proposes a cost model considering all activities in mining cycle and system-wide approach to minimize the total mining cost of bench production. Since the

  • 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), delayOffice of Surface Mining Reclamation and Enforcement (OSMRE),Office of Surface Mining Reclamation and Enforcement (OSMRE)

  • opencast mining % mineinformation opencast mining

    Aug 30, 2020· Opencast mining or quarrying of minerals is easier than mining by underground methods. During quarrying the and rocks below which the minerals lie, are removed and in the initial stages, in a place which is not required in future g, residential or other purposes. The mineral exposed is completely extracted, Opencast mining is also known as open-put mining, open-cut mining, surface mining ,