blasting pattern in opencast mining

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Blast optimization at Kriel Colliery J r n a

sections. The opencast was commissioned in 1978 and consists of two dragline pits and a mini-pit. Project background General information on blasting operations This study was conducted in both Pit 5 and Pit 6. The overburden in Pit 5 is drilled on a 10 m x10 m blast hole pattern …

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Rock fragmentation control in opencast blasting ...

Apr 01, 2016· 1. Introduction. Rock fragmentation distribution influences a range of mining and milling processes including load and haul rates, crushing and grinding performance and ore recovery in beneficiation processes (Michaud et al., 1997).In opencast mining, where blasting is employed for excavation, the overall cost effectiveness of the production operations is compatible with optimization of ...

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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, initiation timing and sequence ...

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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...

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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.

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Drill And Blast Best Practices Part One: Bench Preparation ...

Jul 13, 2020· Introduction – Drill and Blast. The operations of drilling and blasting are critical to mining operations. The safety of a blast, the quality of the material fragmentation, the roads' conditions, and the resulting slope stability all strongly depend on the proper execution of these jobs.

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(PDF) Rock fragmentation control in opencast blasting ...

In opencast mining, where blasting is can be efficiently loaded, transported and milled (Singh et al., employed for excavation, the overall cost effectiveness of the 2005). The goal of efficient blasting can be achieved by investi- production operations is compatible with optimization of drilling gating the …

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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 ...

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Blaster's Training Modules - Module 4 - Blasthole Drilling

Surface Mining, U.S. Department of the Interior, located in Denver, Colorado. The module is an example of the technical assistance the Federal government furnishes States to assist them in meeting the requirements of the Surface Mining Control and Reclamation Act of 1977, upon which their State surface coal-mine regulating programs are based.

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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 activity.

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Blast Training Course Guide - Orica Mining Services

combination, including blast pattern and explosives quantities • Know how to prime and charge blastholes to ensure optimum performance • Select a suitable Initiation System, delay intervals and hook‑up methods • Modify blast patterns in difficult or unusual areas to maintain good results • Control excessive flyrock, ground

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[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 significantly ...

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Opencast Blasting (Question Bank Part - 1 ...

Aug 05, 2021· In this post, we have discussed about Opencast Blasting (Question Bank Part – 1).So, read this post carefully to know about Opencast Blasting (Question Bank Part – 1). यह quiz CMR- 2017, " Opencast Blasting (Question Bank Part – 1) " से बनाया गया है । इसमे सभी " content " को throughly cover कर के questions तैयार ...

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Explosives and Blasting-Part 5 – onlineminingexam

Dec 11, 2015· Blast- Pattern Parameters Burden The BURDEN is the distance from a single row to the face of the excavation, or between rows in the usual case where rows are fired in sequence. The proper burden dimension to use in any given individual blast can be calculated by taking into account hole diameter, relative rock density, and…

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Blasting process in opencast mining

Blasting process in opencast mining Products. As a leading global manufacturer of crushing, grinding and mining equipments, we offer advanced, reasonable solutions for any size-reduction requirements including, Blasting process in opencast mining, quarry, aggregate, and different kinds of minerals.

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Flyrock danger zone demarcation in opencast mines: a risk ...

May 21, 2010· Flyrock, a rock fragment thrown to an excessive distance, is a random event and an ongoing problem in opencast bench blasting. Existing criteria for a 'Flyrock Danger Zone' are rigid, such that blasting may not be permitted where there are structures within about 100 m. A statistical approach to the problem is proposed and new concepts of Factor of Safety, Threat Levels and Flyrock Risk ...

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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 for the four blasts are ...

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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 …

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(PDF) A Practical Approach to Open Pit Blast Design: A ...

The results show that the best blast performance is obtainable using a drilling pattern 2.0 m by 2.8 m, column loading of blastholes with a base charge of 80% special gelatine followed by a column ...

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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 …

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Basic Terminology in Opencast Short-firing » MiningPathsala

Jul 22, 2021· So, read this post carefully to know about Basic Terminology in Opencast Short-firing. Drilling Pattern :- Coal / overburden को blast करके excavate करने के लिए जिस pattern में hole किया जाता है उसे 'Drilling Pattern' कहते है | Blasting Pattern :-

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Open 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

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Solid blasting - Mining Technology

May 30, 2017· Blasting out coal in the centre of the face in the wedge cut pattern gives free face for the remaining coal. The maximum permissible charge to be used per hole therefore varies when blasting out the central wedge with P 5 -explosives and when blasting out the remaining coal (after the central wedge is blasted out thereby providing free face ...

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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 pioneers ...

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Blasting in Open Cast Mines - Mining Technology - Blasting ...

Aug 24, 2009· Explosives and Blasting in Mines to Increase the Production, control Fragmentation and Reduce Ground Vibration. Mining Technology,

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Drilling Pattern, Blasting Design Types used ... - Mining Papa

Jun 16, 2020· Drilling Pattern in Underground Coal Mines. In this Post We Cover drilling pattern in underground coal mines and all 7 types of blasting design patterns like wedge cut drilling pattern, pyramid cut drilling pattern, burn cut drilling pattern, cone cut, ring cut drilling pattern, drag cut drilling pattern, fan cut drilling pattern, cormorant cut ...

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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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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".

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