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[PDF] DETERMINATION OF BENCH BLAST DESIGN …

Bench design geometry parameters are considered the important issue of rock extraction. It directly has influences on rock extraction on all surface mines and quarries operation. This paper discuss the bench height calculation according to three important considerations; the stability of slope faces, the safety of the work place and the efficiency of the work place, besides the …

Controlled Blasting at Quarries - OSSGA

any blasting taking place. Historical background data collected from quarry operations throughout the province as well as data from scientific research organizations form the basis of the report. This data, combined with information supplied by explosives manufacturers, is used to develop a plan for the site of the proposed blasting activity.

Optimization of Blasting-Associated Costs in Surface Mines ...

Blasting outcomes have significant impacts on downstream mining operations such as loading, hauling, crushing, milling, and mineral processing. An ideal blasting plan can result in decrease in undesirable blast-induced impacts and in supplementary costs of downstream operations. This study developed a new mathematical model using a risk-based probability …

Optimization of Blast Design for Quarries -A Case Study …

2.4 Optimization of the Quarry Blasting Parameters 2.4.1Optimization Methodology The parameters were obtained using the Swedish technique developed by Langefors and Kilhstrom (1978). Here, the geometric design of the blasting pattern and the calculation of the charges are based on the uniaxial compressive strength of the rock.

Quarry optimisation good fragmentation less fines

Optimization of blasting at these benches was possible by opening the pattern, ensuring its consistency and by using laser 2D profiling before drilling. This reduction of explosives consumption was done without increase in oversize. This blast design included: - Burden:3,75 m (12.5´) - Spacing 4,5 m (15´) - Stemming 2 m (crushed rock)

Optimization of Blasting Parameters Using Regression ...

This research examines optimization of blasting parameters for economic production of granite aggregates in Ratcon and NSCE quarries …

Optimization of Blasting Parameters Using Regression ...

This research examines optimization of blasting parameters for economic production of granite aggregates in Ratcon and NSCE quarries located atIbadan,OyoState. Samples were collected from the study areas for the determination of rock density and porosity. Schmidt hammer was used for in situ determination of rock hardness. Uniaxial compressive strength of in situ rock …

Toeing the line: Blasting practices to control quarry ...

Blasting today is not simply about breaking the rock into manageable pieces, but properly fragmenting and placing that rock to minimise overall quarry costs and environmental effects. •. Anthony Konya is the senior project engineer and Dr Calvin J Konya the founder and president of Precision Blasting Services (USA).

Prediction of ground vibration due to quarry blasting ...

Prediction of ground vibration due to quarry blasting based ... ations conducted in a granite quarry, Malaysia. To achieve this aim, a total number of 102 blasting operations were ... other input parameters related to blasting design, rock mass properties, and explosive material were utilized for ground vibration prediction (e.g., Singh and ...

Application for Blast Design and Fragmentation Analysis

3. Case studies on blasting Two case studies on blasting are discussed for application of UAV.. 3.1 Granite quarry, Malaysia The granite quarry is situated in Johor Bahru. As the topography of granite quarry was very steep, geological study was undertaken using UAV [9-10]. With the support of UAV, aerial

OPTIMIZATION OF BLASTING PARAMETRS IN OPEN …

product value from quarries [2]. Rock fragmentation from blasting is determined by many factors, namely the properties of the rocks in-situ, e.g. jointing and fracturing, properties of the explosives used, blast pattern design and shot timing. As compressive strength, porosity, density, Young's modulus, Poisson's ratio, and rock fracturing

CONTROLLED BLASTING AT QUARRIES - OSSGA

blasting professional. Atmospheric (such as wind direction, humidity, temperature inversions, cloud cover etc.) and geologic conditions (such as soil types, bedrock, water table level, freeze/thaw conditions, etc.). Blasting will generate noise and vibration that may be heard and felt on properties around a quarry. The vibration levels that will be

Optimization of Blasting Parameters in opencast Mines

less wastage of explosive energy in blasting, less throw of materials, and reduction of blast vibration resulting in greater degrees of safety and stability to the nearby structures. Development of a Blast Optimization Model Selection of proper explosive in any blasting round is an important aspect of optimum blast design.

Blasting mechanics: Blasting design standards : Pit & Quarry

About this four-part series. In 1963, Pit & Quarry published a series of articles on the mechanics of blasting authored by Richard Ash, a longtime professor of mining engineering at the School of Mines & Metallurgy at the University of Missouri-Rolla. The content within each article was ahead of its time, putting forth cutting-edge concepts about the mechanics of rock …

Optimization of Blasting Parameters Using Regression ...

the optimum blasting result using the regression model generated using indices such as oversize generation and geometric volume of blast fit on blast design parameters. Description of the Study Areas . The study areas are located at Ibadan, Oyo state. Two quarries namely NSCE quarry and Ratcon quarry were used for this research.

Optimization Of Blasting Design Parameters On Open Pit ...

Corpus ID: 56219668; Optimization Of Blasting Design Parameters On Open Pit Bench A Case Study Of Nchanga Open Pits @article{Bowa2015OptimizationOB, title={Optimization Of Blasting Design Parameters On Open Pit Bench A Case Study Of Nchanga Open Pits}, author={Victor Mwango Bowa}, journal={International Journal of Scientific & …

Mine – Quarry Planning

Optimization of design to maximize flexibility, throughput efficiency, and power minimization while achieving requsite product quality. Stripping Drilling Blasting . Loading . Hauling Crushing Sizing "Value" Moment 2 3 . 4

Optimization of blasting design parameters on open ... - …

Optimization Of Blasting Design Parameters On Open Pit Bench A Case Study Of Nchanga Open Pits Victor Mwango Bowa Abstract: In hard rock mining, blasting is the most productive excavation technique applied to fragment insitu rock to the required size for efficient loading and crushing.

Optimization of stone-quarry technologies - ScienceDirect

1. Introduction The joint optimization of blasting and crushing technology in stone-quarrying is a complex task. The finished product, which is ready for use, is produced in several stages of crushing combined with screening, and in the individual stages the mechanical stress, i.e. the stretching force of the explosive, pressure, impact, shear ...

Blasting and Fragmentation Journal - International Society ...

Full-scale test blasts were analyzed at a granite quarry in Talbotton, GA. This analysis provides a representative understanding of timing effects on fragmentation in the field, different from previous lab scale studies that negate …

Quarry - Dyno Nobel

In July of 2016, at a granite quarry in the Southeast United States, current drill patterns were a 13x13 with 3' of subdrill using a 5.75" blast hole. The average pounds per hole was 598. The seismograph, measuring vibration, is located within 700ft from the blast. SHA (Signature Hole Analysis) was being utilized to delay shots.

Ground vibration prediction in quarry blasting through an ...

Blasting quarry operation in the vicinity of residential areas may cause critical environmental issues. Environmental problems such as flyrock, air overpressure, ground vibration, and dust and fumes may happen by blasting works due to several causes such as extra explosives, blasting design, the distance between the blast-face and monitoring point, …

Design Optimization of Safety Benches for Surface …

that come into play in the design of the bench width are numerous, making for a difficult problem. Geology, blasting, safety, pit design, hydrology, acceptable risk, reserve estimation, cost, and many other factors impact the chosen bench width. The complicated problem has therefore led to minimally engineered designs.

(PDF) Optimization of Blasting Parameters Using …

The burden and spacing values are either 1.5 m or 2 m for a given blast design.The quarry's blasting patternsgivespowder factor that ranges between 0.625 – …