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Blast design parameters of bench blasting are the controlling parameters which regulate the desired fragmentation level of a particular blast. Rock mass properties and blasting …
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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 …
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Deep hole blasting is widely used in trenching, stripping, mining and other production processes of large mines. Its blasting volume accounts for more than 90% of …
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The concept is similar to that of specific charge in blasting. For mining operations other than blasting, quantification of dust can be done using emis-sion factors. ... 2016, 109-118. DOI: 10.22044/jme.2016.502 Monitoring and assessment of pollutants resulting from bench-blasting operations J. Abdollahisharif1, E. Bakhtavar2* and H ...
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Conclusion. This chapter tried to show a new way to use advanced analytics in mining, especially in rock fragmentation. There are different effective parameters on the quality of the rock fragmentation process—the parameters such as rock properties, drilling data, blasting design, and performance data. Therefore, the selected analytical model ...
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A blasting pattern for a box cut is shown here. Figure 6.4.9: Blasting pattern for a box cut. Sinking blasts like this vary from most blasts because there is no open face for relief and movement must be vertical. Since …
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The degree of rock fragmentation in bench blasting operations in metal mines is influenced by the controllable factors including the blast geometry and the …
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Bench blasting is a widely used approach in mining and civil excavations, characterized by its low-cost and high efficiency. Numerical simulations play very important role in the …
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The blast induced ground vibration also needs to be controlled as large amount of explosives were detonated in the dragline benches. Normal dragline blast of Jayant opencast project consists of detonation of 3-8 …
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The blasting operation considerably influences the overall productivity of opencast mines, especially when blasting results in oversized fragments that impact the operations ranging from ...
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In open-pit mines, the blast operation should be effectively optimized, leading to minimization of production costs through the application of specific technical specifications. However, there is inadequate information in the literature to link blasting to comminution stages. To this end, the effective parameters for the performance of mining …
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In blasting operations for removal of the overburden rocks, which have little or no inherent value, the powder factor is expressed in kg/m 3 . Generally, the powder factor value varies from as low as 0.15 to as much as 1.50 kg/m 3 with 0.30–0.60 kg/m 3 being the most common, in the open pit mines [ 6 ].
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1 Introduction. Deep-hole bench blasting is currently the primary method for aggregate extraction in mines. However, during the process of aggregate extraction, issues such as uneven rock fragmentation and high fines content often arise due to the complex geological conditions and suboptimal blasting process parameters (Roy et al., …
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The bench blast has been widely applied in many fields, such as mining engineering and hydraulic tunnel excavation. The effects of the bench blast would directly affect subsequent operations, such as …
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Bench blasting differs from tunnel blasting in that bench blasting is directed toward multiple free surfaces whereas tunnel blasting is directed toward a single free …
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Therefore, a well-planned and executed drilling and blasting strategy is pivotal for the overall success and sustainability of mining operations, ensuring a harmonious balance between productivity ...
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Credit: Blastcube. Automated or digitised drill and blast operations have the potential to improve productivity and increase profit margins at mine operations while enhancing worker safety, and greater attention is being paid to innovations in this vital early stage of mining projects. These technologies can remove the need for mineworkers to ...
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A prominent mine in Iquique, Chile, also started using continuous surface mining methods in 2017. The mine had a goal of taking a broader approach and evaluating the benefits of continuous surface ...
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Mr Aubin emphasises two key areas that can assist mines. "I see two main areas for development in the blasting sector in the coming years.". More advances using WebGen™ wireless initiation technology, such as double bench mining and mine schedule flexibility. Secondly, 4D™ Bulk Systems technology, integrated with our suite of BlastIQ ...
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Blasting in mining is a chemical and physical process that occurs through the firing of explosives. It breaks mineral-bearing materials. These materials can be coal, ore and mineral stone. Blasting fragments …
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The focus of this paper is the selection of stemming plugs for a bench blasting operation and the examination of blasting operation efficiency based on ergonomics and human factors.
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Exclusion Zone. as exclusion area for equipment and a effects expected Exclusion / foreseen is determined by assessment process, to personnel. be layered, defined as the exclusion an maintained a. Blast equipment strategically. personnel of a suitable and traffic equipment), aDynamic interfere Water is commonly T.
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Based on the site visit and initial observations, the following may be the main reasons behind the boulder generation at this mine site: I. Unavailability of free faces: In some of the blasts, there were the unavailability of the proper free faces. It is necessary to ensure the availability of free faces up to the bench height to get the proper breakage of the rock …
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The blasting quality of open-pit mining can be enhanced and the production cost of stope reduced by establishing a mathematical model for step drilling and blasting costs based on stope consumption. By enhancing the Gray Wolf algorithm, the parameters for step drilling and blasting are optimized, resulting in improved effectiveness for step …
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In open-pit mining, the use of blast-masters, by designing the shape and size of the blasting polygons for the whole bench in the initial planning stages, is essential to increase eciency; Blast design optimisation by adapting the drill and blast parameters to the blasting polygon conditions will achieve the fragmentation target in a continuous ...
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Abstract and Figures. Nitrogen oxides and carbon monoxide gases together with dust are known as the major pollutants arising during the blasting operations using the ammonium nitrate-fuel oil ...
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Bench Blasting – Rock Blasting Services. In large-scale mining operations, it is possible to use blast hole diameters of up to 400 mm while in a small-scale construction operation a blast hole diameter of 30 mm may be the . Read More Overcoming Oversize: Caprock in blasting (Part 1) - Pit Quarry
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The operations of drilling and blasting are the beginning of mining operations. The safety of a blast, the quality of the material fragmentation, the roads' conditions, and the resulting slope ...
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Orica has announced the commercial release of WebGen™ 200 Surface, its latest wireless blast initiation solution tailored to surface mining applications. Developed based on the success of more than 5,000 WebGen 100 blasts around the world, containing over 150,000 primers, WebGen 200 Surface will change how the industry blasts, resulting in ...
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Blasting is a critical step that profoundly influences operational efficiency, costs, and long-term success in the mining industry. The current challenges of blasting …
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Blasting operations take place to breakdown the rock material into the desired size and we call that fragmentation, which is defined as the extent to which a rock mass or rock sample is broken into small pieces either …
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In the fourth section, examples are given of the operational complexity needed to implement a blast to cater for dificult bench geologies, environment constraints, past mining …
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Therefore, prediction of blasting vibration is essential in the mining industry. This paper proposes a combination of principal component analysis (PCA) and support vector machine (SVM) model to ...
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Blasting is a fundamental operation in the mining of metal and non-metal mine sites. There is a historical story of using explosive material in both underground and surface mines sites. ... This explosive can be used as the toe load in bench blasting . ... (2013) used a FIS model to predict PPV from blast operations at a copper mine in Iran ...
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Table 6.3.1: Rock Densities for Commonly Mined Minerals. If you are using an explosive, x, with a different bulk strength, the factor K B changes as follows: K Bx = K B * (B Sx) 1/2, and B Sx is the bulk strength of explosive X. The other two factors are constants: K S = 1 …
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This paper presents an integrated optimization model for both the drilling and blasting operations that consist of all related technical, economic and environmental …
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The study was conducted to develop controlled blasting patterns for safe blasting operations within the blasting zone of 50–100 m from the nearby dwellings. In order to minimize ground vibrations, three methods (1) Reduced burden and spacing with shorter hole depth, (2) Modified decoupled charged using plastic pipes and (3) Pre …
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A series of bench blasting productive tests were conducted in Heishan coal mine in Xinjiang, China. The rock mass of the quarry is slightly weathered sandstone, the saturation moisture compressive strength is 24–42 MPa, and the natural density is 2.41–2.69 g/cm 3.The blasthole diameter used in the previous blasts is 138 mm, and the …
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