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Fragmentation of an opencast mine is one of the critical results of the blasting which is treated as the first quality demand in most types of blasting which affects all the …
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To address this issue a blast hole was drilled at Dragline bench of East Section and was loaded with 1600 kg of explosives and was fired instantaneously without in-hole delay. …
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The study was completed using a combination of rock explosion dynamics, rock mechanics and theoretical foundations of step blasting in opencast mines, using numerical …
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PDF | On May 18, 2020, Radharapu Sampath published Blast Design in Opencast Mines | Find, read and cite all the research you need on ResearchGate.
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Contribute to chengxinjia/sbm development by creating an account on GitHub.
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The opencast mines after extraction of coal are generally left open and filled with mine spoil. The filled up opencast mines due to rapid increase in population are seeking attention in terms of rehabilitation for best possible use. ... Figure 1 shows the general site configuration of the underground explosion that is similar to mine explosion ...
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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 …
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Opencast mining has the advantages of high resource recovery rate, good safety conditions, high labour e˜- ... energy in the explosion while reducing the blast generated by carbon dioxide ...
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4 Chapter-3 Drilling and blasting in large opencast mines 3.1 Drilling There are two forms of rock breakage viz., rock penetration and rock fragmentation. The former includes drilling, cutting, boring etc., while the latter includes blasting etc. The term rock penetration is preferred for all methods of forming a directional hole in the rock.
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Open-pit mining, or opencast mining, is a surface mining technique used for large-scale operations. It involves extracting minerals from a pit by removing waste rock and overburden. Commonly used for minerals like copper, gold, and iron ore, requires heavy equipment such as trucks and shovels to efficiently extract the ore.
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Optimization of Blasting Operation in Opencast Mine P. Taviti Naidu1, P Prudhvi2, G Phanindra2, D Joel Raju 2, R S R K Naidu ... This gives the shattering effect when the explosion explodes. Low explosive: Gun powder (It is a common and earliest known explosive of low explosives). The constituents of Gun
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Spacing and burden are important parameters and have immediate impacts on rock fragmentation in blast design. Excessive burden creates resistance to penetrate the …
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The filled up opencast mines due to rapid increase in population are seeking attention in terms of rehabilitation for best possible use. The issue for raising structure on such filled …
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Air over-pressure (AOp) is one of the products of blasting operations for rock fragmentation in open-pit mines. It can cause structural vibration, smash glass doors, …
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The former opencast coal mine site is said to be ideal for the event Extreme E also prides itself on being a gender-equal motorsport platform, which sees men and women drivers race equally for ...
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It is easy to control the height and width of the explosion pile, which is helpful to improve the mining efficiency; It is easy to keep the bench slope angle and slope smooth, …
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Opencast Mining; These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves. References 'Effect of Weather on Sound …
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The goal of the investigation is to develop a result of optimum blast design through some parameters, as type of explosive, explosive quantity, blast pattern and fragmentation. …
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Modern opencast mines are in general larger and deeper than the earlier operations, giving rise to a higher percentage of overburden requiring greater blasting in the area. Solutions to these problems call for in-depth understanding of the basic parameters involved in the process of blasting, to ascertain the basic features of generation ...
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Opencast mining is also known as open-put mining, open-cut mining, surface mining and also as strip mining, the later term being commonly used in the U.S.A. for opencast mining of coal. ... There is no risk of gas explosion. Very few stringent mining regulations are applicable to quarries. For example, compared to underground mining less number ...
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As regarding, this research aims to develop an ANN model for predicting blast-produced PPV at an open-pit coal mine of Vietnam (Fig. 1). Explosives used at the mine are …
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This paper presents some of the results of numerical simulation of flow and pollution dispersion in the proximity of coal deposit placed in the area of opencast coal mine. The mathematical model is based on Reynolds averaged Navier‐Stokes equations for incompressible flows. Turbulent closure of the model is obtained by simple algebraic …
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PDF | On May 18, 2020, Radharapu Sampath published Blast Design in Opencast Mines | Find, read and cite all the research you need on ResearchGate
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explosion, has forced the opencast coal mines to turn toward higher mechanization for extraction of coal and removal of O/B as well (Rai et al . 1999) [1]. Amlohri ... Amlohri opencast mine has a total geological reserve of 328.55MT out of which the mineable reserve is that of 314.46MT (EAC minutes, 2014) [2]. Amlohri mine
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